[ /Title (80C86 ) /Subject (CMO S 16Bit Microprocessor) /Autho r () /Keywords (Intersil Corporation, Intersil Corporation, 16 Bit uP, microprocessor, 8086, PC) /Cre- 80C86 CMOS 16-Bit Microprocessor March 1997 Features Description * Compatible with NMOS 8086 The Intersil 80C86 high performance 16-bit CMOS CPU is manufactured using a self-aligned silicon gate CMOS process (Scaled SAJI IV). Two modes of operation, minimum for small systems and maximum for larger applications such as multiprocessing, allow user configuration to achieve the highest performance level. Full TTL compatibility (with the exception of CLOCK) and industry standard operation allow use of existing NMOS 8086 hardware and software designs. * Completely Static CMOS Design - DC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5MHz (80C86) - DC . . . . . . . . . . . . . . . . . . . . . . . . . . . .8MHz (80C86-2) * Low Power Operation - lCCSB . . . . . . . . . . . . . . . . . . . . . . . . . . . . .500A Max - ICCOP . . . . . . . . . . . . . . . . . . . . . . . . . 10mA/MHz Typ Ordering Information * 1MByte of Direct Memory Addressing Capability * 24 Operand Addressing Modes PACKAGE * Bit, Byte, Word and Block Move Operations PDIP TEMP. RANGE 0oC to +70oC 5MHz CP80C86 -40oC to +85oC lP80C86 * 8-Bit and 16-Bit Signed/Unsigned Arithmetic - Binary, or Decimal - Multiply and Divide PLCC 0oC to +70oC CS80C86 -40oC to +85oC lS80C86 * Wide Operating Temperature Range - C80C86 . . . . . . . . . . . . . . . . . . . . . . . . . . 0oC to +70oC - l80C86 . . . . . . . . . . . . . . . . . . . . . . . . . -40oC to +85oC - M80C86 . . . . . . . . . . . . . . . . . . . . . . . -55oC to +125oC 0oC CERDIP to +70oC CD80C86 -40oC to +85oC ID80C86 -55oC SMD# CLCC SMD# PKG. NO. CP80C86-2 E40.6 IP80C86-2 E40.6 CS80C86-2 N44.65 IS80C86-2 N44.65 CD80C86-2 F40.6 ID80C86-2 F40.6 MD80C86/B MD80C862/B F40.6 -55oC to +125oC 8405201QA 8405202QA F40.6 -55oC to +125oC MR80C86/B MR80C862/B J44.A -55oC to +125oC 8405201XA 8405202XA J44.A CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. http://www.intersil.com or 407-727-9207 | Copyright (c) Intersil Corporation 1999 3-141 to +125oC 8MHz File Number 2957.1 80C86 Pinouts 80C86 (DIP) TOP VIEW GND 1 MAX 40 VCC (MIN) AD14 2 39 AD15 AD13 3 38 A16/S3 AD12 4 37 A17/S4 AD11 5 36 A18/S5 AD10 6 35 A19/S6 AD9 7 34 BHE/S7 AD8 8 33 MN/MX AD7 9 32 RD AD6 10 31 RQ/GT0 (HOLD) AD5 11 30 RQ/GT1 (HLDA) AD4 12 29 LOCK (WR) AD3 13 28 S2 (M/IO) AD2 14 27 S1 (DT/R)) AD1 15 26 S0 (DEN) AD0 16 25 QS0 (ALE) NMI 17 24 QS1 (INTA) INTR 18 23 TEST CLK 19 22 READY GND 20 21 RESET VCC A17/S4 A18/S5 NC VCC NC A17/S4 A18/S5 GND GND AD15 AD14 AD14 A16/S3 AD13 AD13 AD15 AD11 AD12 AD12 MIN MODE 80C86 AD11 MAX MODE 80C86 A16/S3 80C86 (PLCC, CLCC) TOP VIEW 6 5 4 3 2 1 44 43 42 41 40 7 39 8 38 NC A19/S6 NC A19/S6 AD8 9 37 BHE/S7 BHE/S7 AD7 10 36 MN/MX MN/MX AD6 AD6 11 35 RD RD AD5 AD5 12 34 HOLD RQ/GT0 AD4 AD4 13 33 HLDA RQ/GT1 AD3 AD3 14 32 WR LOCK AD2 AD2 15 31 M/IO S2 AD1 AD0 AD1 AD0 16 30 17 29 DT/R DEN S1 S0 READY TEST INTA ALE TEST QS1 QS0 NC NC READY GND GND RESET CLK CLK RESET INTR INTR 18 19 20 21 22 23 24 25 26 27 28 NC AD7 NMI AD8 NC AD10 AD9 NMI AD10 AD9 3-142 MIN MODE 80C86 MAX MODE 80C86 80C86 Functional Diagram EXECUTION UNIT REGISTER FILE BUS INTERFACE UNIT RELOCATION REGISTER FILE DATA POINTER AND INDEX REGS (8 WORDS) SEGMENT REGISTERS AND INSTRUCTION POINTER (5 WORDS) 16-BIT ALU 16 BHE/S7 A19/S6 A16/S3 AD15-AD0 3 INTA, RD, WR 4 DT/R, DEN, ALE, M/IO 4 FLAGS BUS INTERFACE UNIT 6-BYTE INSTRUCTION QUEUE TEST INTR NMI RQ/GT0, 1 LOCK CONTROL AND TIMING 2 HOLD HLDA CLK 2 QS0, QS1 3 S2, S1, S0 3 RESET READY MN/MX GND VCC MEMORY INTERFACE C-BUS INSTRUCTION STREAM BYTE QUEUE B-BUS ES CS BUS INTERFACE UNIT SS DS IP EXECUTION UNIT CONTROL SYSTEM A-BUS AH BH AL BL CL CH EXECUTION UNIT ARITHMETIC/ LOGIC UNIT DL DH SP BP SI FLAGS DI 3-143 80C86 Pin Description The following pin function descriptions are for 80C86 systems in either minimum or maximum mode. The "Local Bus" in these description is the direct multiplexed bus interface connection to the 80C86 (without regard to additional bus buffers). SYMBOL PIN NUMBER TYPE DESCRIPTION AD15-AD0 2-16, 39 I/O ADDRESS DATA BUS: These lines constitute the time multiplexed memory/lO address (T1) and data (T2, T3, TW, T4) bus. A0 is analogous to BHE for the lower byte of the data bus, pins D7D0. It is LOW during Ti when a byte is to be transferred on the lower portion of the bus in memory or I/O operations. Eight-bit oriented devices tied to the lower half would normally use A0 to condition chip select functions (See BHE). These lines are active HIGH and are held at high impedance to the last valid logic level during interrupt acknowledge and local bus "hold acknowledge" or "grant sequence". A19/S6 A18/S5 A17/S4 A16/S3 35-38 O ADDRESS/STATUS: During T1, these are the four most significant address lines for memory operations. During I/O operations these lines are LOW. During memory and I/O operations, status information is available on these lines during T2, T3, TW, T4. S6 is always LOW. The status of the interrupt enable FLAG bit (S5) is updated at the beginning of each clock cycle. S4 and S3 are encoded as shown. This information indicates which segment register is presently being used for data accessing. These lines are held at high impedance to the last valid logic level during local bus "hold acknowledge" or "grant sequence". BHE/S7 34 O S4 S3 CHARACTERISTICS 0 0 Alternate Data 0 1 Stack 1 0 Code or None 1 1 Data BUS HIGH ENABLE/STATUS: During T1 the bus high enable signal (BHE) should be used to enable data onto the most significant half of the data bus, pins D15-D8. Eight bit oriented devices tied to the upper half of the bus would normally use BHE to condition chip select functions. BHE is LOW during T1 for read, write, and interrupt acknowledge cycles when a byte is to be transferred on the high portion of the bus. The S7 status information is available during T2, T3 and T4. The signal is active LOW, and is held at high impedance to the last valid logic level during interrupt acknowledge and local bus "hold acknowledge" or "grant sequence", it is LOW during T1 for the first interrupt acknowledge cycle. BHE A0 CHARACTERISTICS 0 0 Whole Word 0 1 Upper Byte From/to Odd Address 1 0 Lower Byte From/to Even address 1 1 None RD 32 O READ: Read strobe indicates that the processor is performing a memory or I/O read cycle, depending on the state of the M/IO or S2 pin. This signal is used to read devices which reside on the 80C86 local bus. RD is active LOW during T2, T3 and TW of any read cycle, and is guaranteed to remain HIGH in T2 until the 80C86 local bus has floated. This line is held at a high impedance logic one state during "hold acknowledge" or "grand sequence". READY 22 I READY: is the acknowledgment from the addressed memory or I/O device that will complete the data transfer. The RDY signal from memory or I/O is synchronized by the 82C84A Clock Generator to form READY. This signal is active HIGH. The 80C86 READY input is not synchronized. Correct operation is not guaranteed if the Setup and Hold Times are not met. 3-144 80C86 Pin Description (Continued) The following pin function descriptions are for 80C86 systems in either minimum or maximum mode. The "Local Bus" in these description is the direct multiplexed bus interface connection to the 80C86 (without regard to additional bus buffers). SYMBOL PIN NUMBER TYPE DESCRIPTION INTR 18 I INTERRUPT REQUEST: is a level triggered input which is sampled during the last clock cycle of each instruction to determine if the processor should enter into an interrupt acknowledge operation. A subroutine is vectored to via an interrupt vector lookup table located in system memory. It can be internally masked by software resetting the interrupt enable bit. lNTR is internally synchronized. This signal is active HIGH. TEST 23 I TEST: input is examined by the "Wait" instruction. If the TEST input is LOW execution continues, otherwise the processor waits in an "Idle" state. This input is synchronized internally during each clock cycle on the leading edge of CLK. NMI 17 I NON-MASKABLE INTERRUPT: is an edge triggered input which causes a type 2 interrupt. A subroutine is vectored to via an interrupt vector lookup table located in system memory. NMI is not maskable internally by software. A transition from LOW to HIGH initiates the interrupt at the end of the current instruction. This input is internally synchronized. RESET 21 I RESET: causes the processor to immediately terminate its present activity. The signal must transition LOW to HIGH and remain active HIGH for at least four clock cycles. It restarts execution, as described in the Instruction Set description, when RESET returns LOW. RESET is internally synchronized. CLK 19 I CLOCK: provides the basic timing for the processor and bus controller. It is asymmetric with a 33% duty cycle to provide optimized internal timing. VCC 40 VCC: +5V power supply pin. A 0.1F capacitor between pins 20 and 40 is recommended for decoupling. GND 1, 20 GND: Ground. Note: both must be connected. A 0.1F capacitor between pins 1 and 20 is recommended for decoupling. MN/MX 33 I MINIMUM/MAXIMUM: Indicates what mode the processor is to operate in. The two modes are discussed in the following sections. Minimum Mode System The following pin function descriptions are for the 80C86 in minimum mode (i.e., MN/MX = VCC). Only the pin functions which are unique to minimum mode are described; all other pin functions are as described below. SYMBOL PIN NUMBER TYPE DESCRIPTION M/IO 28 O STATUS LINE: logically equivalent to S2 in the maximum mode. It is used to distinguish a memory access from an I/O access. M/lO becomes valid in the T4 preceding a bus cycle and remains valid until the final T4 of the cycle (M = HIGH, I/O = LOW). M/lO is held to a high impedance logic one during local bus "hold acknowledge". WR 29 O WRITE: indicates that the processor is performing a write memory or write I/O cycle, depending on the state of the M/IO signal. WR is active for T2, T3 and TW of any write cycle. It is active LOW, and is held to high impedance logic one during local bus "hold acknowledge". INTA 24 O INTERRUPT ACKNOWLEDGE: is used as a read strobe for interrupt acknowledge cycles. It is active LOW during T2, T3 and TW of each interrupt acknowledge cycle. Note that INTA is never floated. ALE 25 O ADDRESS LATCH ENABLE: is provided by the processor to latch the address into the 82C82/82C83 address latch. It is a HIGH pulse active during clock LOW of T1 of any bus cycle. Note that ALE is never floated. 3-145 80C86 Minimum Mode System (Continued) The following pin function descriptions are for the 80C86 in minimum mode (i.e., MN/MX = VCC). Only the pin functions which are unique to minimum mode are described; all other pin functions are as described below. SYMBOL PIN NUMBER TYPE DESCRIPTION DT/R 27 O DATA TRANSMIT/RECEIVE: is needed in a minimum system that desires to use a data bus transceiver. It is used to control the direction of data flow through the transceiver. Logically, DT/R is equivalent to S1 in maximum mode, and its timing is the same as for M/IO (T = HIGH, R = LOW). DT/R is held to a high impedance logic one during local bus "hold acknowledge". DEN 26 O DATA ENABLE: provided as an output enable for a bus transceiver in a minimum system which uses the transceiver. DEN is active LOW during each memory and I/O access and for INTA cycles. For a read or INTA cycle it is active from the middle of T2 until the middle of T4, while for a write cycle it is active from the beginning of T2 until the middle of T4. DEN is held to a high impedance logic one during local bus "hold acknowledge". HOLD HLDA 31, 30 I O HOLD: indicates that another master is requesting a local bus "hold". To be an acknowledged, HOLD must be active HIGH. The processor receiving the "hold" will issue a "hold acknowledge" (HLDA) in the middle of a T4 or TI clock cycle. Simultaneously with the issuance of HLDA, the processor will float the local bus and control lines. After HOLD is detected as being LOW, the processor will lower HLDA, and when the processor needs to run another cycle, it will again drive the local bus and control lines. HOLD is not an asynchronous input. External synchronization should be provided if the system cannot otherwise guarantee the setup time. Maximum Mode System The following pin function descriptions are for the 80C86 system in maximum mode (i.e., MN/MX - GND). Only the pin functions which are unique to maximum mode are described below. SYMBOL PIN NUMBER TYPE DESCRIPTION S0 S1 S2 26 27 28 O O O STATUS: is active during T4, T1 and T2 and is returned to the passive state (1, 1, 1) during T3 or during TW when READY is HIGH. This status is used by the 82C88 Bus Controller to generate all memory and I/O access control signals. Any change by S2, S1 or S0 during T4 is used to indicate the beginning of a bus cycle, and the return to the passive state in T3 or TW is used to indicate the end of a bus cycle. These signals are held at a high impedance logic one state during "grant sequence". S2 S1 S0 0 0 0 Interrupt Acknowledge 0 0 1 Read I/O Port 0 1 0 Write I/O Port 0 1 1 Halt 1 0 0 Code Access 1 0 1 Read Memory 1 1 0 Write Memory 1 1 1 Passive 3-146 CHARACTERISTICS 80C86 Maximum Mode System (Continued) The following pin function descriptions are for the 80C86 system in maximum mode (i.e., MN/MX - GND). Only the pin functions which are unique to maximum mode are described below. SYMBOL RQ/GT0 RQ/GT1 PIN NUMBER TYPE DESCRIPTION 31, 30 I/O REQUEST/GRANT: pins are used by other local bus masters to force the processor to release the local bus at the end of the processor's current bus cycle. Each pin is bidirectional with RQ/GTO having higher priority than RQ/GT1. RQ/GT has an internal pull-up bus hold device so it may be left unconnected. The request/grant sequence is as follows (see RQ/GT Sequence Timing) 1. A pulse of 1 CLK wide from another local bus master indicates a local bus request ("hold") to the 80C86 (pulse 1). 2. During a T4 or TI clock cycle, a pulse 1 CLK wide from the 80C86 to the requesting master (pulse 2) indicates that the 80C86 has allowed the local bus to float and that it will enter the "grant sequence" state at the next CLK. The CPU's bus interface unit is disconnected logically from the local bus during "grant sequence". 3. A pulse 1 CLK wide from the requesting master indicates to the 80C86 (pulse 3) that the "hold" request is about to end and that the 80C86 can reclaim the local bus at the next CLK. The CPU then enters T4 (or TI if no bus cycles pending). Each Master-Master exchange of the local bus is a sequence of 3 pulses. There must be one idle CLK cycle after each bus exchange. Pulses are active low. If the request is made while the CPU is performing a memory cycle, it will release the local bus during T4 of the cycle when all the following conditions are met: 1. 2. 3. 4. Request occurs on or before T2. Current cycle is not the low byte of a word (on an odd address). Current cycle is not the first acknowledge of an interrupt acknowledge sequence. A locked instruction is not currently executing. If the local bus is idle when the request is made the two possible events will follow: 1. Local bus will be released during the next cycle. 2. A memory cycle will start within three clocks. Now the four rules for a currently active memory cycle apply with condition number 1 already satisfied. LOCK 29 O LOCK: output indicates that other system bus masters are not to gain control of the system bus while LOCK is active LOW. The LOCK signal is activated by the "LOCK" prefix instruction and remains active until the completion of the next instruction. This signal is active LOW, and is held at a high impedance logic one state during "grant sequence". In MAX mode, LOCK is automatically generated during T2 of the first INTA cycle and removed during T2 of the second INTA cycle. QS1, QSO 24, 25 O QUEUE STATUS: The queue status is valid during the CLK cycle after which the queue operation is performed. QS1 and QS0 provide status to allow external tracking of the internal 80C86 instruction queue. Note that QS1, QS0 never become high impedance. QSI QSO 0 0 No Operation 0 1 First byte of op code from queue 1 0 Empty the queue 1 1 Subsequent byte from queue 3-147 80C86 Functional Description code, data, extra and stack segments of up to 64K bytes each, with each segment falling on 16-byte boundaries. (See Figure 1). Static Operation All 80C86 circuitry is of static design. Internal registers, counters and latches are static and require no refresh as with dynamic circuit design. This eliminates the minimum operating frequency restriction placed on other microprocessors. The CMOS 80C86 can operate from DC to the specified upper frequency limit. The processor clock may be stopped in either state (HIGH/LOW) and held there indefinitely. This type of operation is especially useful for system debug or power critical applications. The 80C86 can be single stepped using only the CPU clock. This state can be maintained as long as is necessary. Single step clock operation allows simple interface circuitry to provide critical information for bringing up your system. FFFFFH 64K-BIT CODE SEGMENT XXXXOH STACK SEGMENT + OFFSET SEGMENT REGISTER FILE DATA SEGMENT CS SS Static design also allows very low frequency operation (down to DC). In a power critical situation, this can provide extremely low power operation since 80C86 power dissipation is directly related to operating frequency. As the system frequency is reduced, so is the operating power until, ultimately, at a DC input frequency, the 80C86 power requirement is the standby current, (500A maximum). DS ES EXTRA SEGMENT 00000H Internal Architecture FIGURE 1. 80C86 MEMORY ORGANIZATION The internal functions of the 80C86 processor are partitioned logically into two processing units. The first is the Bus Interface Unit (BlU) and the second is the Execution Unit (EU) as shown in the CPU functional diagram. These units can interact directly, but for the most part perform as separate asynchronous operational processors. The bus interface unit provides the functions related to instruction fetching and queuing, operand fetch and store, and address relocation. This unit also provides the basic bus control. The overlap of instruction pre-fetching provided by this unit serves to increase processor performance through improved bus bandwidth utilization. Up to 6 bytes of the instruction stream can be queued while waiting for decoding and execution. The instruction stream queuing mechanism allows the BIU to keep the memory utilized very efficiently. Whenever there is space for at least 2 bytes in the queue, the BlU will attempt a word fetch memory cycle. This greatly reduces "dead-time" on the memory bus. The queue acts as a First-In-First-Out (FIFO) buffer, from which the EU extracts instruction bytes as required. If the queue is empty (following a branch instruction, for example), the first byte into the queue immediately becomes available to the EU. The execution unit receives pre-fetched instructions from the BlU queue and provides un-relocated operand addresses to the BlU. Memory operands are passed through the BIU for processing by the EU, which passes results to the BIU for storage. Memory Organization The processor provides a 20-bit address to memory, which locates the byte being referenced. The memory is organized as a linear array of up to 1 million bytes, addressed as 00000(H) to FFFFF(H). The memory is logically divided into TABLE 1. TYPE OF MEMORY REFERENCE DEFAULT SEGMENT BASE ALTERNATE SEGMENT BASE Instruction Fetch CS None IP Stack Operation SS None SP Variable (except following) DS CS, ES, SS Effective Address String Source DS CS, ES, SS SI String Destination ES None DI BP Used As Base Register SS CS, DS, ES OFFSET Effective Address All memory references are made relative to base addresses contained in high speed segment registers. The segment types were chosen based on the addressing needs of programs. The segment register to be selected is automatically chosen according to the specific rules of Table 1. All information in one segment type share the same logical attributes (e.g. code or data). By structuring memory into re-locatable areas of similar characteristics and by automatically selecting segment registers, programs are shorter, faster and more structured. (See Table 1). Word (16-bit) operands can be located on even or odd address boundaries and are thus, not constrained to even boundaries as is the case in many 16-bit computers. For address and data operands, the least significant byte of the word is stored in the lower valued address location and the most significant byte in the next higher address location. The BIU automatically performs the proper number of memory 3-148 80C86 accesses; one, if the word operand is on an even byte boundary and two, if it is on an odd byte boundary. Except for the performance penalty, this double access is transparent to the software. The performance penalty does not occur for instruction fetches; only word operands. Physically, the memory is organized as a high bank (D15D8) and a low bank (D7-D0) of 512K bytes addressed in parallel by the processor's address lines. Byte data with even addresses is transferred on the D7-D0 bus lines, while odd addressed byte data (A0 HIGH) is transferred on the D15-D8 bus lines. The processor provides two enable signals, BHE and A0, to selectively allow reading from or writing into either an odd byte location, even byte location, or both. The instruction stream is fetched from memory as words and is addressed internally by the processor at the byte level as necessary. In referencing word data, the BlU requires one or two memory cycles depending on whether the starting byte of the word is on an even or odd address, respectively. Consequently, in referencing word operands performance can be optimized by locating data on even address boundaries. This is an especially useful technique for using the stack, since odd address references to the stack may adversely affect the context switching time for interrupt processing or task multiplexing. Certain locations in memory are reserved for specific CPU operations (See Figure 2). Locations from address FFFF0H through FFFFFH are reserved for operations including a jump to the initial program loading routine. Following RESET, the CPU will always begin execution at location FFFF0H where the jump must be located. Locations 00000H through 003FFH are reserved for interrupt operations. Each of the 256 possible interrupt service routines is accessed thru its own pair of 16bit pointers (segment address pointer and offset address pointer). The first pointer, used as the offset address, is loaded into the lP and the second pointer, which designates the base address is loaded into the CS. At this point program control is transferred to the interrupt routine. The pointer elements are assumed to have been stored at the respective places in reserved memory prior to occurrence of interrupts. Minimum and Maximum Operation Modes The requirements for supporting minimum and maximum 80C86 systems are sufficiently different that they cannot be met efficiently using 40 uniquely defined pins. Consequently, the 80C86 is equipped with a strap pin (MN/MX) which defines the system configuration. The definition of a certain subset of the pins changes, dependent on the condition of the strap pin. When the MN/MX pin is strapped to GND, the 80C86 defines pins 24 through 31 and 34 in maximum mode. When the MN/MX pin is strapped to VCC, the 80C86 generates bus control signals itself on pins 24 through 31 and 34. 80C86 provides DEN and DT/R to control the transceiver, and ALE to latch the addresses. This configuration of the minimum mode provides the standard demultiplexed bus structure with heavy bus buffering and relaxed bus timing requirements. The maximum mode employs the 82C88 bus controller (See Figure 6B). The 82C88 decodes status lines S0, S1 and S2, and provides the system with all bus control signals. Moving the bus control to the 82C88 provides better source and sink current capability to the control lines, and frees the 80C86 pins for extended large system features. Hardware lock, queue status, and two request/grant interfaces are provided by the 80C86 in maximum mode. These features allow coprocessors in local bus and remote bus configurations. Bus Operation The 80C86 has a combined address and data bus commonly referred to as a time multiplexed bus. This technique provides the most efficient use of pins on the processor while permitting the use of a standard 40 lead package. This "local bus" can be buffered directly and used throughout the system with address latching provided on memory and I/O modules. In addition, the bus can also be demultiplexed at the processor with a single set of 82C82 address latches if a standard non-multiplexed bus is desired for the system. Each processor bus cycle consists of at least four CLK cycles. These are referred to as T1, T2, T3 and T4 (see Figure 3). The address is emitted from the processor during T1 and data transfer occurs on the bus during T3 and T4. T2 is used primarily for changing the direction of the bus during read operations. In the event that a "NOT READY" indication is given by the addressed device, "Wait" states (TW) are inserted between T3 and T4. Each inserted wait state is the same duration as a CLK cycle. Periods can occur between 80C86 driven bus cycles. These are referred to as idle" states (TI) or inactive CLK cycles. The processor uses these cycles for internal housekeeping and processing. During T1 of any bus cycle, the ALE (Address Latch Enable) signal is emitted (by either the processor or the 82C88 bus controller, depending on the MN/MX strap). At the trailing edge of this pulse, a valid address and certain status information for the cycle may be latched. Status bits S0, S1 and S2 are used by the bus controller, in maximum mode, to identify the type of bus transaction according to Table 2. The minimum mode 80C86 can be used with either a multiplexed or demultiplexed bus. This architecture provides the 80C86 processing power in a highly integrated form. The demultiplexed mode requires two 82C82 latches (for 64K addressability) or three 82C82 latches (for a full megabyte of addressing). An 82C86 or 82C87 transceiver can also be used if data bus buffering is required. (See Figure 6A.) The 3-149 TABLE 2. S2 S1 S0 CHARACTERISTICS 0 0 0 Interrupt 0 0 1 Read I/O 0 1 0 Write I/O 0 1 1 Halt 1 0 0 Instruction Fetch 1 0 1 Read Data from Memory 1 1 0 Write Data to Memory 1 1 1 Passive (No Bus Cycle) 80C86 Status bits S3 through S7 are time multiplexed with high order address bits and the BHE signal, and are therefore valid during T2 through T4. S3 and S4 indicate which segment register (see Instruction Set Description) was used for this bus cycle in forming the address, according to Table 3. S5 is a reflection of the PSW interrupt enable bit. S3 is always zero and S7 is a spare status bit. TABLE 3. S4 S3 CHARACTERISTICS 0 0 Alternate Data (Extra Segment) 0 1 Stack 1 0 Code or None 1 1 Data FFFFFH FFFF0H I/O Addressing In the 80C86, I/O operations can address up to a maximum of 64K I/O byte registers or 32K I/O word registers. The I/O address appears in the same format as the memory address on bus lines A15-A0. The address lines A19-A16 are zero in I/O operations. The variable I/O instructions which use register DX as a pointer have full address capability while the direct I/O instructions directly address one or two of the 256 I/O byte locations in page 0 of the I/O address space. I/O ports are addressed in the same manner as memory locations. Even addressed bytes are transferred on the D7-D0 bus lines and odd addressed bytes on D15-D8. Care must be taken to ensure that each register within an 8-bit peripheral located on the lower portion of the bus be addressed as even. RESET BOOTSTRAP PROGRAM JUMP 3FCH TYPE 225 POINTER (AVAILABLE) 084H TYPE 33 POINTER (AVAILABLE) 080H TYPE 32 POINTER (AVAILABLE) 07FH TYPE 31 POINTER (AVAILABLE) 014H TYPE 5 POINTER (RESERVED) 010H TYPE 4 POINTER OVERFLOW 00CH TYPE 3 POINTER 1 BYTE INT INSTRUCTION 008H TYPE 2 POINTER NON MASKABLE 004H TYPE 1 POINTER SINGLE STEP 000H TYPE 0 POINTER DIVIDE ERROR 3FFH AVAILABLE INTERRUPT POINTERS (224) RESERVED INTERRUPT POINTERS (27) DEDICATED INTERRUPT POINTERS (5) CS BASE ADDRESS 16 BITS FIGURE 2. RESERVED MEMORY LOCATIONS 3-150 IP OFFSET 80C86 (4 + NWAIT) = TCY T1 T2 T3 (4 + NWAIT) = TCY TWAIT T4 T1 T2 T3 TWAIT T4 CLK GOES INACTIVE IN THE STATE JUST PRIOR TO T4 ALE S2-S0 ADDR/ STATUS BHE, A19-A16 BHE A19-A16 S7-S3 S7-S3 BUS RESERVED FOR DATA IN ADDR/DATA D15-D0 VALID A15-A0 A15-A0 DATA OUT (D15-D0) RD, INTA READY READY READY WAIT WAIT DT/R DEN MEMORY ACCESS TIME WR FIGURE 3. BASIC SYSTEM TIMING 3-151 80C86 External Interface Interrupt Operations Processor RESET and Initialization Processor initialization or start up is accomplished with activation (HIGH) of the RESET pin. The 80C86 RESET is required to be HIGH for greater than 4 CLK cycles. The 80C86 will terminate operations on the high-going edge of RESET and will remain dormant as long as RESET is HIGH. The low-going transition of RESET triggers an internal reset sequence for approximately 7 clock cycles. After this interval, the 80C86 operates normally beginning with the instruction in absolute location FFFF0H. (See Figure 2). The RESET input is internally synchronized to the processor clock. At initialization, the HIGHto-LOW transition of RESET must occur no sooner than 50s (or 4 CLK cycles, whichever is greater) after power-up, to allow complete initialization of the 80C86. NMl will not be recognized prior to the second CLK cycle following the end of RESET. If NMl is asserted sooner than nine clock cycles after the end of RESET, the processor may execute one instruction before responding to the interrupt. Bus Hold Circuitry To avoid high current conditions caused by floating inputs to CMOS devices and to eliminate need for pull-up/down resistors, "bus-hold" circuitry has been used on the 80C86 pins 2-16, 2632 and 34-39. (See Figure 4A and Figure 4B). These circuits will maintain the last valid logic state if no driving source is present (i.e., an unconnected pin or a driving source which goes to a high impedance state). To overdrive the "bus hold" circuits, an external driver must be capable of supplying approximately 400A minimum sink or source current at valid input voltage levels. Since this "bus hold" circuitry is active and not a "resistive" type element, the associated power supply current is negligible and power dissipation is significantly reduced when compared to the use of passive pull-up resistors. BOND PAD OUTPUT DRIVER EXTERNAL PIN INPUT BUFFER FIGURE 4A. BUS HOLD CIRCUITRY PIN 2-16, 34-39 BOND PAD OUTPUT DRIVER INPUT BUFFER Interrupts result in a transfer of control to a new program location. A 256-element table containing address pointers to the interrupt service program locations resides in absolute locations 0 through 3FFH, which are reserved for this purpose. Each element in the table is 4 bytes in size and corresponds to an interrupt "type". An interrupting device supplies an 8-bit type number during the interrupt acknowledge sequence, which is used to "vector" through the appropriate element to the new interrupt service program location. All flags and both the Code Segment and Instruction Pointer register are saved as part of the lNTA sequence. These are restored upon execution of an Interrupt Return (IRET) instruction. Non-Maskable Interrupt (NMI) The processor provides a single non-maskable interrupt pin (NMI) which has higher priority than the maskable interrupt request pin (INTR). A typical use would be to activate a power failure routine. The NMI is edge-triggered on a LOWto-HIGH transition. The activation of this pin causes a type 2 interrupt. NMl is required to have a duration in the HIGH state of greater than two CLK cycles, but is not required to be synchronized to the clock. Any positive transition of NMI is latched on-chip and will be serviced at the end of the current instruction or between whole moves of a block-type instruction. Worst case response to NMI would be for multiply, divide, and variable shift instructions. There is no specification on the occurrence of the low-going edge; it may occur before, during or after the servicing of NMI. Another positive edge triggers another response if it occurs after the start of the NMI procedure. The signal must be free of logical spikes in general and be free of bounces on the low-going edge to avoid triggering extraneous responses. Maskable Interrupt (INTR) INPUT PROTECTION CIRCUITRY VCC Interrupt operations fall into two classes: software or hardware initiated. The software initiated interrupts and software aspects of hardware interrupts are specified in the Instruction Set Description. Hardware interrupts can be classified as non-maskable or maskable. P EXTERNAL PIN INPUT PROTECTION CIRCUITRY FIGURE 4B. BUS HOLD CIRCUITRY PIN 26-32 The 80C86 provides a single interrupt request input (lNTR) which can be masked internally by software with the resetting of the interrupt enable flag (IF) status bit. The interrupt request signal is level triggered. It is internally synchronized during each clock cycle on the high-going edge of CLK. To be responded to, lNTR must be present (HIGH) during the clock period preceding the end of the current instruction or the end of a whole move for a block type instruction. lNTR may be removed anytime after the falling edge of the first INTA signal. During the interrupt response sequence further interrupts are disabled. The enable bit is reset as part of the response to any interrupt (lNTR, NMI, software interrupt or single-step), although the FLAGS register which is automatically pushed onto the stack reflects the state of the processor prior to the interrupt. Until the old FLAGS register is restored, the enable bit will be zero unless specifically set by an instruction. 3-152 80C86 During the response sequence (Figure 5) the processor executes two successive (back-to-back) interrupt acknowledge cycles. The 80C86 emits the LOCK signal (Max mode only) from T2 of the first bus cycle until T2 of the second. A local bus "hold" request will not be honored until the end of the second bus cycle. In the second bus cycle, a byte is supplied to the 80C86 by the 82C59A Interrupt Controller, which identifies the source (type) of the interrupt. This byte is multiplied by four and used as a pointer into the interrupt vector lookup table. An INTR signal left HIGH will be continually responded to within the limitations of the enable bit and sample period. The INTERRUPT RETURN instruction includes a FLAGS pop which returns the status of the original interrupt enable bit when it restores the FLAGS. T1 T2 T3 T4 TI T1 T2 T3 External Synchronization Via TEST As an alternative to interrupts, the 80C86 provides a single software-testable input pin (TEST). This input is utilized by executing a WAIT instruction. The single WAIT instruction is repeatedly executed until the TEST input goes active (LOW). The execution of WAIT does not consume bus cycles once the queue is full. If a local bus request occurs during WAIT execution, the 80C86 three-states all output drivers while inputs and I/O pins are held at valid logic levels by internal bus-hold circuits. If interrupts are enabled, the 80C86 will recognize interrupts and process them when it regains control of the bus. The WAIT instruction is then refetched, and re-executed. TABLE 4. 80C86 REGISTER T4 ALE LOCK AX AH AL ACCUMULATOR BX BH BL BASE CX CH CL COUNT DX DH DL DATA INTA AD0AD15 FLOAT TYPE VECTOR FIGURE 5. INTERRUPT ACKNOWLEDGE SEQUENCE Halt When a software "HALT" instruction is executed the processor indicates that it is entering the "HALT" state in one of two ways depending upon which mode is strapped. In minimum mode, the processor issues one ALE with no qualifying bus control signals. In maximum mode the processor issues appropriate HALT status on S2, S1, S0 and the 82C88 bus controller issues one ALE. The 80C86 will not leave the "HALT" state when a local bus "hold" is entered while in "HALT". In this case, the processor reissues the HALT indicator at the end of the local bus hold. An NMI or interrupt request (when interrupts enabled) or RESET will force the 80C86 out of the "HALT" state. Read/Modify/Write (Semaphore) Operations Via Lock The LOCK status information is provided by the processor when consecutive bus cycles are required during the execution of an instruction. This gives the processor the capability of performing read/modify/write operations on memory (via the Exchange Register With Memory instruction, for example) without another system bus master receiving intervening memory cycles. This is useful in multiprocessor system configurations to accomplish "test and set lock" operations. The LOCK signal is activated (forced LOW) in the clock cycle following decoding of the software "LOCK" prefix instruction. It is deactivated at the end of the last bus cycle of the instruction following the "LOCK" prefix instruction. While LOCK is active a request on a RQ/GT pin will be recorded and then honored at the end of the LOCK. SP STACK POINTER BP BASE POINTER SI SOURCE INDEX DI DESTINATION INDEX IP INSTRUCTION POINTER FLAGSH FLAGSL STATUS FLAG CS CODE SEGMENT DS DATA SEGMENT SS STACK SEGMENT ES EXTRA SEGMENT Basic System Timing Typical system configurations for the processor operating in minimum mode and in maximum mode are shown in Figures 6A and 6B, respectively. In minimum mode, the MN/MX pin is strapped to VCC and the processor emits bus control signals (e.g. RD, WR, etc.) directly. In maximum mode, the MN/MX pin is strapped to GND and the processor emits coded status information which the 82C88 bus controller uses to generate MULTIBUS compatible bus control signals. Figure 3 shows the signal timing relationships. System Timing - Minimum System The read cycle begins in T1 with the assertion of the Address Latch Enable (ALE) signal. The trailing (low-going) edge of this signal is used to latch the address information, which is valid on the address/data bus (AD0-AD15) at this time, into the 82C82/82C83 latch. The BHE and A0 signals address the low, high or both bytes. From T1 to T4 the M/lO signal indicates a memory or I/O operation. At T2, the address is removed from the address/data bus and the bus is held at the last valid logic state by internal bus hold 3-153 80C86 devices. The read control signal is also asserted at T2. The read (RD) signal causes the addressed device to enable its data bus drivers to the local bus. Some time later, valid data will be available on the bus and the addressed device will drive the READY line HIGH. When the processor returns the read signal to a HIGH level, the addressed device will again three-state its bus drivers. If a transceiver (82C86/82C87) is required to buffer the 80C86 local bus, signals DT/R and DEN are provided by the 80C86. A write cycle also begins with the assertion of ALE and the emission of the address. The M/IO signal is again asserted to indicate a memory or I/O write operation. In T2, immediately following the address emission, the processor emits the data to be written into the addressed location. This data remains valid until at least the middle of T4. During T2, T3 and TW, the processor asserts the write control signal. The write (WR) signal becomes active at the beginning of T2 as opposed to the read which is delayed somewhat into T2 to provide time for output drivers to become inactive. The BHE and A0 signals are used to select the proper byte(s) of the memory/lO word to be read or written according to Table 5. A0 0 0 Whole word 0 1 Upper Byte From/To Odd Address 1 0 Lower Byte From/To Even Address 1 1 None For medium complexity systems the MN/MX pin is connected to GND and the 82C88 Bus Controller is added to the system as well as an 82C82/82C83 latch for latching the system address, and an 82C86/82C87 transceiver to allow for bus loading greater than the 80C86 is capable of handling. Signals ALE, DEN, and DT/R are generated by the 82C88 instead of the processor in this configuration, although their timing remains relatively the same. The 80C86 status outputs (S2, S1 and S0) provide type-of-cycle information and become 82C88 inputs. This bus cycle information specifies read (code, data or I/O), write (data or I/O), interrupt acknowledge, or software halt. The 82C88 issues control signals specifying memory read or write, I/O read or write, or interrupt acknowledge. The 82C88 provides two types of write strobes, normal and advanced, to be applied as required. The normal write strobes have data valid at the leading edge of write. The advanced write strobes have the same timing as read strobes, and hence, data is not valid at the leading edge of write. The 82C86/82C87 transceiver receives the usual T and OE inputs from the 82C88 DT/R and DEN signals. The pointer into the interrupt vector table, which is passed during the second INTA cycle, can be derived from an 82C59A located on either the local bus or the system bus. If the master 82C59A Priority Interrupt Controller is positioned on the local bus, the 82C86/82C87 transceiver must be disabled when reading from the master 82C59A during the interrupt acknowledge sequence and software "poll". TABLE 5. BHE Bus Timing - Medium Size Systems CHARACTERISTICS I/O ports are addressed in the same manner as memory location. Even addressed bytes are transferred on the D7-D0 bus lines and odd address bytes on D15-D8. The basic difference between the interrupt acknowledge cycle and a read cycle is that the interrupt acknowledge signal (INTA) is asserted in place of the read (RD) signal and the address bus is held at the last valid logic state by internal bus hold devices. (See Figure 4). In the second of two successive INTA cycles a byte of information is read from the data bus (D7-D0) as supplied by the interrupt system logic (i.e., 82C59A Priority Interrupt Controller). This byte identifies the source (type) of the interrupt. It is multiplied by four and used as a pointer into an interrupt vector lookup table, as described earlier. 3-154 80C86 VCC VCC MN/MX M/IO INTA 82C8A/85 CLOCK GENERATOR CLK READY RES RD WR RESET RDY DT/R DEN GND WAIT STATE GENERATOR ALE 80C86 CPU GND 1 VCC AD0-AD15 A16-A19 C1 20 STB GND OE ADDR ADDR/DATA 82C82 LATCH 2 OR 3 BHE GND C2 40 T VCC OE 82C86 TRANSCEIVER (2) C1 = C2 = 0.1F DATA A0 BHE OPTIONAL FOR INCREASED DATA BUS DRIVE EH EL W G HM-6516 CMOS RAM 2K x 8 2K x 8 E G HM-6616 CMOS PROM (2) 2K x 8 2K x 8 CS RD WR CMOS 82CXX PERIPHERALS FIGURE 6A. MINIMUM MODE 80C86 TYPICAL CONFIGURATION VCC GND MN/MX CLK S0 READY S1 RESET S2 82C84A/85 CLOCK GENERATOR/ RES RDY 80C86 CPU GND LOCK WAIT STATE GENERATOR MRDC NC NC NC STB GND 1 VCC CLK MWTC S0 82C88 S1 BUS AMWC S2 CTRLR IORC IOWC DEN DT/R AIOWC ALE INTA C1 GND AD0-AD15 A16-A19 BHE 20 ADDR/DATA OE ADDR 82C82 (2 OR 3) GND C2 40 C1 = C2 = 0.1F VCC T OE DATA 82C86 TRANSCEIVER (2) A0 BHE EH EL W G HM-65162 CMOS RAM 2K x 8 2K x 8 E G HM-6616 CMOS PROM (2) 2K x 8 2K x 8 FIGURE 6B. MAXIMUM MODE 80C86 TYPICAL CONFIGURATION 3-155 CS RDWR CMOS 82CXX PERIPHERALS 80C86 Absolute Maximum Ratings Thermal Information Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +8.0V Input, Output or I/O Voltage . . . . . . . . . . . .GND -0.5V to VCC +0.5V Storage Temperature Range . . . . . . . . . . . . . . . . . -65oC to +150oC Junction Temperature Ceramic Packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +175oC Plastic Packages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150oC Lead Temperature (Soldering 10s) . . . . . . . . . . . . . . . . . . . . +300oC (Lead tips only for surface mount packages) ESD Classification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Class 1 Thermal Resistance (Typical, Note 1) JA (oC/W) JC (oC/W) PDIP Package . . . . . . . . . . . . . . . . . . . 50 N/A PLCC Package . . . . . . . . . . . . . . . . . . 46 N/A SBDIP Package . . . . . . . . . . . . . . . . . . 30 6 CLCC Package . . . . . . . . . . . . . . . . . . 40 6 Gate Count . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9750 Gates CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. NOTE: 1. JA is measured with the component mounted on an evaluation PC board in free air. Operating Conditions Operating Supply Voltage. . . . . . . . . . . . . . . . . . . . . +4.5V to +5.5V M80C86-2 ONLY. . . . . . . . . . . . . . . . . . . . . . . . +4.75V to +5.25V DC Electrical Specifications SYMBOL VCC = 5.0V, 10%; VCC = 5.0V, 10%; VCC = 5.0V, 10%; VCC = 5.0V, 5%; PARAMETER VlH Logical One Input Voltage VIL Logical Zero Input Voltage VIHC CLK Logical One Input Voltage VILC CLK Logical Zero Input Voltage VOH Output High Voltage VOL Output Low Voltage Operating Temperature Range: C80C86/-2 . . . . . . . . 0oC to +70oC I80C86/-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40oC to +85oC M80C86/-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55oC to +125oC TA = 0oC to +70oC (C80C86, C80C86-2) TA = -40oC to +85oC (l80C86, I80C86-2) TA = -55oC to +125oC (M80C86) TA = -55oC to +125oC (M80C86-2) MIN MAX 2.0 2.2 UNITS V V 0.8 VCC -0.8 TEST CONDITION C80C86, I80C86 (Note 5) M80C86 (Note 5) V V 0.8 3.0 VCC -0.4 V V V lOH = -2.5mA lOH = -100A 0.4 V lOL = +2.5mA Input Leakage Current -1.0 1.0 A VIN = GND or VCC DIP Pins 17-19, 21-23, 33 lBHH Input Current-Bus Hold High -40 -400 A VIN = - 3.0V (Note 1) lBHL Input Current-Bus Hold Low 40 400 A VIN = - 0.8V (Note 2) Output Leakage Current - -10.0 A VOUT = GND (Note 4) ICCSB Standby Power Supply Current - 500 A VCC = - 5.5V (Note 3) ICCOP Operating Power Supply Current - 10 mA/MHz II IO Capacitance SYMBOL CIN COUT CI/O FREQ = Max, VIN = VCC or GND, Outputs Open TA = 25oC PARAMETER TYPICAL UNITS TEST CONDITIONS Input Capacitance 25 pF FREQ = 1MHz. All measurements are referenced to device GND Output Capacitance 25 pF FREQ = 1MHz. All measurements are referenced to device GND I/O Capacitance 25 pF FREQ = 1MHz. All measurements are referenced to device GND NOTES: 2. lBHH should be measured after raising VIN to VCC and then lowering to 3.0V on the following pins 2-16, 26-32, 34-39. 3. IBHL should be measured after lowering VIN to GND and then raising to 0.8V on the following pins: 2-16, 34-39. 4. lCCSB tested during clock high time after halt instruction executed. VIN = VCC or GND, VCC = 5.5V, Outputs unloaded. 5. IO should be measured by putting the pin in a high impedance state and then driving VOUT to GND on the following pins: 26-29 and 32. 6. MN/MX is a strap option and should be held to VCC or GND. 3-156 80C86 AC Electrical Specifications VCC = 5.0V 10%; TA = 0oC to +70oC (C80C86, C80C86-2) VCC = 5.0V 100%; TA = -40oC to +85oC (I80C86, I80C86-2) VCC = 5.0V 100%; TA = -55oC to +125oC (M80C86) VCC = 5.0V 5%; TA = -55oC to +125oC (M80C86-2) MINIMUM COMPLEXITY SYSTEM 80C86 SYMBOL PARAMETER MIN 80C86-2 MAX MIN MAX UNITS TEST CONDITIONS TIMING REQUIREMENTS (1) TCLCL Cycle Period 200 125 ns (2) TCLCH CLK Low Time 118 68 ns (3) TCHCL CLK High Time 69 44 ns (4) TCH1CH2 CLK Rise Time 10 10 ns From 1.0V to 3.5V (5) TCL2C1 CLK FaIl Time 10 10 ns From 3.5V to 1.0V (6) TDVCL Data In Setup Time 30 20 ns (7) TCLDX1 Data In Hold Time 10 10 ns (8) TR1VCL RDY Setup Time into 82C84A (Notes 7, 8) 35 35 ns (9) TCLR1X RDY Hold Time into 82C84A (Notes 7, 8) 0 0 ns (10) TRYHCH READY Setup Time into 80C86 118 68 ns (11) TCHRYX READY Hold Time into 80C86 30 20 ns (12) TRYLCL READY Inactive to CLK (Note 9) -8 -8 ns (13) THVCH HOLD Setup Time 35 20 ns (14) TINVCH lNTR, NMI, TEST Setup Time (Note 8) 30 15 ns (15) TILIH Input Rise Time (Except CLK) 15 15 ns From 0.8V to 2.0V (16) TIHIL Input FaIl Time (Except CLK) 15 15 ns From 2.0V to 0.8V 60 ns CL = 100pF ns CL = 100pF 50 ns CL = 100pF 50 ns CL = 100pF 60 ns CL = 100pF ns CL = 100pF TIMING RESPONSES (17) TCLAV Address Valid Delay 10 110 10 (18) TCLAX Address Hold Time 10 (19) TCLAZ Address Float Delay TCLAX (20) TCHSZ Status Float Delay (21) TCHSV Status Active Delay (22) TLHLL ALE Width (23) TCLLH ALE Active Delay 80 50 ns CL = 100pF (24) TCHLL ALE Inactive Delay 85 55 ns CL = 100pF 10 80 TCLAX 80 10 110 TCLCH-20 3-157 10 TCLCH-10 80C86 AC Electrical Specifications VCC = 5.0V 10%; TA = 0oC to +70oC (C80C86, C80C86-2) VCC = 5.0V 100%; TA = -40oC to +85oC (I80C86, I80C86-2) VCC = 5.0V 100%; TA = -55oC to +125oC (M80C86) VCC = 5.0V 5%; TA = -55oC to +125oC (M80C86-2) (Continued) MINIMUM COMPLEXITY SYSTEM 80C86 SYMBOL PARAMETER MIN TCHCL-10 80C86-2 MAX MIN (25) TLLAX Address Hold Time to ALE Inactive (26) TCLDV Data Valid Delay 10 (27) TCLDX2 Data Hold Time 10 (28) TWHDX Data Hold Time After WR TCLCL-30 (29) TCVCTV Control Active Delay 1 10 110 10 (30) TCHCTV Control Active Delay 2 10 110 (31) TCVCTX Control Inactive Delay 10 110 (32) TAZRL Address Float to READ Active 0 (33) TCLRL RD Active Delay 10 165 10 (34) TCLRH RD Inactive Delay 10 150 10 (35) TRHAV RD Inactive to Next Address Active (36) TCLHAV HLDA Valid Delay (37) TRLRH RD Width 2TCLCL-75 (38) TWLWH WR Width (39) TAVAL Address Valid to ALE Low (40) TOLOH Output Rise Time 20 (41) TOHOL Output Fall Time 20 MAX TCHCL-10 UNITS TEST CONDITIONS ns CL = 100pF ns CL = 100pF 10 ns CL = 100pF TCLCL-30 ns CL = 100pF 70 ns CL = 100pF 10 60 ns CL = 100pF 10 70 ns CL = 100pF ns CL = 100pF 100 ns CL = 100pF 80 ns CL = 100pF ns CL = 100pF ns CL = 100pF 2TCLCL-50 ns CL = 100pF 2TCLCL-60 2TCLCL-40 ns CL = 100pF TCLCH-60 TCLCH-40 ns CL = 100pF 15 ns From 0.8V to 2.0V 15 ns From 2.0V to 0.8V 110 TCLCL-40 160 10 NOTES: 7. Signal at 82C84A shown for reference only. 8. Setup requirement for asynchronous signal only to guarantee recognition at next CLK. 9. Applies only to T2 state (8ns into T3). 3-158 60 0 TCLCL-45 10 10 100 80C86 Waveforms T1 T2 T3 T4 (5) TCL2CL1 (1) TCLCL TW TCH1CH2 (4) CLK (82C84A OUTPUT) (3) (2) TCLCH TCHCL (30) TCHCTV TCHCTV (30) M/IO (17) TCLAV (17) TCLAV (26) TCLDV (18) TCLAX S7-S3 BHE, A19-A16 BHE/S7, A19/S6-A16/S3 TLHLL (22) (23) TCLLH TLLAX (25) ALE (24) TR1VCL (8) TCHLL RDY (82C84A INPUT) SEE NOTE VIH TAVAL (39) VIL TCLR1X (9) (12) TRYLCL (11) TCHRYX READY (80C86 INPUT) (19) TCLAZ AD15-AD0 (10) TRYHCH (16) TDVCL AD15-AD0 DATA IN (32) TAZRL (34) TCLRH (7) TCLDX1 TRHAV (35) RD (30) TCHCTV READ CYCLE (WR, INTA = VOH) TRLRH (37) TCLRL (33) (30) TCHCTV DT/R (29) TCVCTV TCVCTX (31) DEN FIGURE 7A. BUS TIMING - MINIMUM MODE SYSTEM NOTE: Signals at 82C84A are shown for reference only. RDY is sampled near the end of T2, T3, TW to determine if TW machine states are to be inserted. 3-159 80C86 Waveforms (Continued) T1 T2 (4) TCH1CH2 T3 TW CLK (82C84A OUTPUT) (26) TCLDV TCLAX (17) TCLAV TCVCTV (27) TCLDX2 (18) AD15-AD0 AD15-AD0 WRITE CYCLE T4 TW (5) TCL2CL1 DATA OUT TWHDX (29) (28) (31) TCVCTX DEN (RD, INTA, DT/R = VOH) (29) TCVCTV (38) TWLWH WR TCVCTX TDVCL (19) TCLAZ (31) (6) TCLDX1 (7) POINTER AD15-AD0 TCHCTV (30) TCHCTV (30) DT/R INTA CYCLE (SEE NOTE) (RD, WR = VOH BHE = VOL) (29) TCVCTV INTA (29) TCVCTV TCVCTX (31) DEN SOFTWARE HALT DEN, RD, WR, INTA = VOH INVALID ADDRESS AD15-AD0 SOFTWARE HALT TCLAV (17) DT/R = INDETERMINATE FIGURE 7B. BUS TIMING - MINIMUM MODE SYSTEM NOTE: Two INTA cycles run back-to-back. The 80C86 local ADDR/DATA bus is floating during both INTA cycles. Control signals are shown for the second INTA cycle. 3-160 80C86 AC Electrical Specifications VCC = 5.0V 10% VCC = 5.0V 10%; VCC = 5.0V 10%; VCC = 5.0V 5%; TA = 0oC to +70oC (C80C86, C80C86-2) TA = -40oC to +85oC (I80C86, I80C86-2) TA = -55oC to +125oC (M80C86) TA = -55oC to +125oC (M80C86-2) MAX MODE SYSTEM (USING 82C88 BUS CONTROLLER) TIMING REQUIREMENTS SYMBOL PARAMETER 80C86 MIN 80C86-2 MAX MIN MAX UNITS TEST CONDITIONS (1) TCLCL CLK Cycle Period 200 125 ns (2) TCLCH CLK Low Time 118 68 ns (3) TCHCL CLK High Time 69 44 ns (4) TCH1CH2 CLK Rise Time 10 10 ns From 1.0V to 3.5V (5) TCL2CL1 CLK Fall Time 10 10 ns From 3.5V to 1.0V (6) TDVCL Data in Setup Time 30 20 ns (7) TCLDX1 Data In Hold Time 10 10 ns (8) TR1VCL RDY Setup Time into 82C84A (Notes 10, 11) 35 35 ns (9) TCLR1X RDY Hold Time into 82C84A (Notes 10, 11) 0 0 ns (10) TRYHCH READY Setup Time into 80C86 118 68 ns (11) TCHRYX READY Hold Time into 80C86 30 20 ns (12) TRYLCL READY Inactive to CLK (Note 12) -8 -8 ns (13) TlNVCH Setup Time for Recognition (lNTR, NMl, TEST) (Note 11) 30 15 ns (14) TGVCH RQ/GT Setup Time 30 15 ns (15) TCHGX RQ Hold Time into 80C86 (Note 13) 40 (16) TILlH Input Rise Time (Except CLK) (17) TIHIL Input Fall Time (Except CLK) TCHCL+ 10 30 TCHCL+ 10 ns 15 15 ns From 0.8V to 2.0V 15 15 ns From 2.0V to 0.8V TIMING RESPONSES (18) TCLML Command Active Delay (Note 10) 5 35 5 35 ns CL = 100pF for All 80C86 Outputs (In Addition to 80C86 Self Load) (19) TCLMH Command Inactive (Note 10) 5 35 5 35 ns CL = 100pF for All 80C86 Outputs (In Addition to 80C86 Self Load) (20) TRYHSH 65 ns CL = 100pF for All 80C86 Outputs (In Addition to 80C86 Self Load) (21) TCHSV Status Active Delay 10 110 10 60 ns CL = 100pF for All 80C86 Outputs (In Addition to 80C86 Self Load) (22) TCLSH Status Inactive Delay (Note 14) 10 130 10 70 ns CL = 100pF for All 80C86 Outputs (In Addition to 80C86 Self Load) READY Active to Status Passive (Notes 12, 14) 110 3-161 80C86 AC Electrical Specifications VCC = 5.0V 10% VCC = 5.0V 10%; VCC = 5.0V 10%; VCC = 5.0V 5%; TA = 0oC to +70oC (C80C86, C80C86-2) TA = -40oC to +85oC (I80C86, I80C86-2) TA = -55oC to +125oC (M80C86) TA = -55oC to +125oC (M80C86-2) (Continued) MAX MODE SYSTEM (USING 82C88 BUS CONTROLLER) TIMING REQUIREMENTS SYMBOL PARAMETER 80C86 80C86-2 MIN MAX MIN MAX UNITS TEST CONDITIONS 110 10 60 ns CL = 100pF for All 80C86 Outputs (In Addition to 80C86 Self Load) ns CL = 100pF for All 80C86 Outputs (In Addition to 80C86 Self Load) 50 ns CL = 100pF for All 80C86 Outputs (In Addition to 80C86 Self Load) (23) TCLAV Address Valid Delay 10 (24) TCLAX Address Hold Time 10 (25) TCLAZ Address Float Delay TCLAX (26) TCHSZ Status Float Delay 80 50 ns CL = 100pF for All 80C86 Outputs (In Addition to 80C86 Self Load) (27) TSVLH Status Valid to ALE High (Note 10) 20 20 ns CL = 100pF for All 80C86 Outputs (In Addition to 80C86 Self Load) (28) TSVMCH Status Valid to MCE High (Note 10) 30 30 ns CL = 100pF for All 80C86 Outputs (In Addition to 80C86 Self Load) (29) TCLLH CLK low to ALE Valid (Note 10) 20 20 ns CL = 100pF for All 80C86 Outputs (In Addition to 80C86 Self Load) (30) TCLMCH CLK low to MCE High (Note 10) 25 25 ns CL = 100pF for All 80C86 Outputs (In Addition to 80C86 Self Load) (31) TCHLL ALE Inactive Delay (Note 10) 18 ns CL = 100pF for All 80C86 Outputs (In Addition to 80C86 Self Load) (32) TCLMCL MCE Inactive Delay (Note 10) 15 ns CL = 100pF for All 80C86 Outputs (In Addition to 80C86 Self Load) (33) TCLDV Data Valid Delay 10 60 ns CL = 100pF for All 80C86 Outputs (In Addition to 80C86 Self Load) (34) TCLDX2 Data Hold Time 10 ns CL = 100pF for All 80C86 Outputs (In Addition to 80C86 Self Load) 4 10 80 18 TCLAX 4 15 3-162 110 10 10 80C86 AC Electrical Specifications VCC = 5.0V 10% VCC = 5.0V 10%; VCC = 5.0V 10%; VCC = 5.0V 5%; TA = 0oC to +70oC (C80C86, C80C86-2) TA = -40oC to +85oC (I80C86, I80C86-2) TA = -55oC to +125oC (M80C86) TA = -55oC to +125oC (M80C86-2) (Continued) MAX MODE SYSTEM (USING 82C88 BUS CONTROLLER) TIMING REQUIREMENTS SYMBOL PARAMETER 80C86 80C86-2 MIN MAX MIN MAX UNITS TEST CONDITIONS (35) TCVNV Control Active Delay (Note 10) 5 45 5 45 ns CL = 100pF for All 80C86 Outputs (In Addition to 80C86 Self Load) (36) TCVNX Control Inactive Delay (Note 10) 10 45 10 45 ns CL = 100pF (37) TAZRL Address Float to Read Active 0 ns CL = 100pF (38) TCLRL RD Active Delay 10 165 10 100 ns CL = 100pF (39) TCLRH RD Inactive Delay 10 150 10 80 ns CL = 100pF (40) TRHAV RD Inactive to Next Address Active ns CL = 100pF (41) TCHDTL Direction Control Active Delay (Note 10) 50 50 ns CL = 100pF (42) TCHDTH Direction Control Inactive Delay (Note 10) 30 30 ns CL = 100pF (43) TCLGL GT Active Delay 10 85 0 50 ns CL = 100pF (44) TCLGH GT Inactive Delay 10 85 0 50 ns CL = 100pF (45) TRLRH RD Width ns CL = 100pF (46) TOLOH Output Rise Time 20 15 ns From 0.8V to 2.0V (47) TOHOL Output Fall Time 20 15 ns From 2.0V to 0.8V 0 TCLCL -45 TCLCL -40 2TCLC L -75 2TCLC L -50 NOTES: 10. Signal at 82C84A or 82C88 shown for reference only. 11. Setup requirement for asynchronous signal only to guarantee recognition at next CLK. 12. Applies only to T2 state (8ns into T3). 13. The 80C86 actively pulls the RQ/GT pin to a logic one on the following clock low time. 14. Status lines return to their inactive (logic one) state after CLK goes low and READY goes high. 3-163 80C86 Waveforms T1 T2 (4) TCH1CH2 (1) TCLCL T3 T4 (5) TCL2CL1 TW CLK (23) TCLAV TCLCH (2) TCHCL (3) QS0, QS1 TCLSH (21) TCHSV S2, S1, S0 (EXCEPT HALT) (33) (SEE NOTE 17) TCLDV TCLAX (23) TCLAV TCLAV (24) BHE, A19-A16 BHE/S7, A19/S6-A16/S3 TSVLH (27) ALE (82C88 OUTPUT) (22) (23) S7-S3 TCHLL (31) TCLLH (29) NOTE TR1VCL (8) RDY (82C84 INPUT) TCLR1X (9) (12) TRYLCL (11) READY 80C86 INPUT) (24) TCLAX TRYHSH (20) TCHRYX (10) TRYHCH READ CYCLE TCLAV (25) TCLAZ (23) (6) TDVCL AD15-AD0 AD15-AD0 (37) TAZRL (7) TCLDX1 DATA IN (39) TCLRH TRHAV RD (42) TCHDTH (41) TCHDTL TCLRL (38) DT/R TCLML 82C88 OUTPUTS SEE NOTES 15, 16 (18) (40) TRLRH (45) TCLMH (19) TCVNX (36) MRDC OR IORC (35) TCVNV DEN FIGURE 8A. BUS TIMING - MAXIMUM MODE (USING 82C88) NOTES: 15. Signals at 82C84A or 82C88 are shown for reference only. RDY is sampled near the end of T2, T3, TW to determine if TW machine states are to be inserted. 16. The issuance of the 82C88 command and control signals (MRDC, MWTC, AMWC, IORC, IOWC, AIOWC, INTA, and DEN) lags the active high 82C88 CEN. 17. Status inactive in state just prior to T4. 3-164 80C86 Waveforms (Continued) T1 T2 T3 T4 TW CLK TCHSV (21) (SEE NOTE 20)) S2, S1, S0 (EXCEPT HALT) WRITE CYCLE (23) TCLAV (33) (24) TCLDV TCLAX TCLSH (22) AD15-AD0 TCLDX2 DATA TCVNX (36) TCVNV (35) DEN 82C88 OUTPUTS SEE NOTES 18, 19 (34) TCLMH (19) (18) TCLML AMWC OR AIOWC TCLMH (19) (18)TCLML MWTC OR IOWC INTA CYCLE AD15-AD0 (SEE NOTES 21, 22) RESERVED FOR CASCADE ADDR (25) TCLAZ (6) AD15-AD0 TDVCL TCLDX1 (7) POINTER (32) TCLMCL (28) TSVMCH (41) TCHDTL MCE/PDEN (30) TCLMCH DT/R 82C88 OUTPUTS SEE NOTES 18, 19 (42) TCHDTH (18) TCLML INTA TCVNV (35) (19) TCLMH DEN SOFTWARE HALT - RD, MRDC, IORC, MWTC, AMWC, IOWC, AIOWC, INTA, S0, S1 = VOH TCVNX (36) INVALID ADDRESS AD15-AD0 TCLAV (23) S2 TCHSV (21) TCLSH (22) FIGURE 8B. BUS TIMING - MAXIMUM MODE (USING 82C88) NOTES: 18. Signals at 82C84A or 82C86 are shown for reference only. 19. The issuance of the 82C88 command and control signals (MRDC, MWTC, AMWC, IORC, IOWC, AIOWC, INTA and DEN) lags the active high 82C88 CEN. 20. Status inactive in state just prior to T4. 21. Cascade address is valid between first and second INTA cycles. 22. Two INTA cycles run back-to-back. The 80C86 local ADDR/DATA bus is floating during both INTA cycles. Control for pointer address is shown for second INTA cycle. 3-165 80C86 Waveforms (Continued) >0-CLK ANY CLK CYCLE CYCLES CLK TCLGH (44) TGVCH (14) (1) TCLCL TCHGX (15) RQ/GT TCLGH (44) PULSE 2 80C86 GT PULSE 1 COPROCESSOR RQ PREVIOUS GRANT AD15-AD0 TCLGL (43) PULSE 3 COPROCESSOR RELEASE TCLAZ (25) 80C86 COPROCESSOR TCHSV (21) (SEE NOTE) TCHSZ (26) RD, LOCK BHE/S7, A19/S0-A16/S3 S2, S1, S0 NOTE: The coprocessor may not drive the busses outside the region shown without risking contention. FIGURE 9. REQUEST/GRANT SEQUENCE TIMING (MAXIMUM MODE ONLY) 1CLK CYCLE 1 OR 2 CYCLES CLK THVCH (13) THVCH (13) HOLD TCLHAV (36) TCLHAV (36) HLDA TCLAZ (19) AD15-AD0 80C86 80C86 COPROCESSOR TCHSV (21) TCHSZ (20) BHE/S7, A19/S6-A16/S3 RD, WR, M/IO, DT/R, DEN FIGURE 10. HOLD/HOLD ACKNOWLEDGE TIMING (MINIMUM MODE ONLY) CLK ANY CLK CYCLE CLK (13) TINVCH (SEE NOTE) NMI INTR ANY CLK CYCLE TCLAV (23) TCLAV (23) SIGNAL LOCK TEST NOTE: Setup requirements for asynchronous signals only to guarantee recognition at next CLK. FIGURE 11. ASYNCHRONOUS SIGNAL RECOGNITION FIGURE 12. BUS LOCK SIGNAL TIMING (MAXIMUM MODE ONLY) 3-166 80C86 Waveforms (Continued) 50s VCC CLK (7) TCLDX1 (6) TDVCL RESET 4 CLK CYCLES FIGURE 13. RESET TIMING AC Test Circuit OUTPUT FROM DEVICE UNDER TEST TEST POINT CL (SEE NOTE) NOTE: Includes stay and jig capacitance. AC Testing Input, Output Waveform INPUT VIH + 20% VIH OUTPUT 1.5V 1.5V VOH VOL VIL - 50% VIL NOTE: AC Testing: All input signals (other than CLK) must switch between VILMAX -50% VIL and VIHMIN +20% VIH. CLK must switch between 0.4V and VCC.-0.4 Input rise and fall times are driven at 1ns/V. 3-167 80C86 Burn-In Circuits MD80C86 CERDIP C GND 1 GND GND RIO VCC 40 RIO 2 AD14 AD15 39 3 AD13 AD16 38 4 AD12 AD17 37 5 AD11 AD18 36 6 AD10 AD19 35 7 AD9 BHE 34 8 AD8 MX 33 9 AD7 RD 32 10 AD6 RQ0 31 11 AD5 RQ1 30 12 AD4 LOCK 29 OPEN 13 AD3 S2 28 OPEN 14 AD2 S1 27 OPEN 15 AD1 S0 26 RO OPEN 16 AD0 QS0 25 RO GND 17 NMI QS2 24 GND 18 INTR TEST 23 19 CLK READY 22 RI 20 GND RESET 21 RI GND VCL GND GND VCL GND GND GND VCL VCL VCL F0 GND RIO RIO RIO RIO RIO RIO RIO RIO RIO RIO RC NOTES: COMPONENTS: VCC = 5.5V 0.5V, GND = 0V. Input voltage limits (except clock): VIL (maximum) = 0.4V VIH (minimum) = 2.6V, VIH (clock) = (VCC -0.4V) minimum. VCC/2 is external supply set to 2.7V 10%. VCL is generated on program card (VCC - 0.65V). Pins 13 - 16 input sequenced instructions from internal hold devices. F0 = 100kHz 10%. Node A = a 40s pulse every 2.56ms. 1. 2. 3. 4. 5. 3-168 RO RO RO RO RO VCC VCL VCC/2 VCC/2 VCC/2 VCC/2 VCC/2 GND RO RI RO RO RO RO RO VCC/2 VCL VCL VCC/2 VCC/2 VCC/2 VCC/2 VCC/2 VCC/2 GND VCL NODE A FROM PROGRAM CARD RI = 10k 5%, 1/4W RO = 1.2k 5%, 1/4W RIO = 2.7k 5%, 1/4W RC = 1k 5%, 1/4W C = 0.01F (Minimum) 80C86 Burn-In Circuits (Continued) MR80C86 CLCC VCC VCL RIO RIO RIO RIO RIO RIO RIO 6 5 4 3 RO RO RO RIO RIO RIO RIO RIO C 1 44 43 42 41 40 2 7 39 8 38 9 37 10 36 11 35 12 34 13 33 14 32 15 31 16 30 17 29 RO RO RO RI RI RO RO RO RO RO RO RI RI RC 18 19 20 21 22 23 24 25 26 27 28 VCC/2 GND F0 A (FROM PROGRAM CARD) NOTES: COMPONENTS: VCC = 5.5V 0.5V, GND = 0V. Input voltage limits (except clock): VIL (maximum) = 0.4V VIH (minimum) = 2.6V, VIH (clock) = (VCC -0.4V) minimum. VCC/2 is external supply set to 2.7V 10%. VCL is generated on program card (VCC - 0.65V). Pins 13 - 16 input sequenced instructions from internal hold devices. F0 = 100kHz 10%. Node A = a 40s pulse every 2.56ms. 1. 2. 3. 4. 5. 3-169 RI = 10k 5%, 1/4W RO = 1.2k 5%, 1/4W RIO = 2.7k 5%, 1/4W RC = 1k 5%, 1/4W C = 0.01F (Minimum) 80C86 Metallization Topology DIE DIMENSIONS: 249.2 x 290.9 x 19 GLASSIVATION: Type: Nitrox Thickness: 10kA 2kA METALLIZATION: Type: Silicon - Aluminum Thickness: 11kA 2kA WORST CASE CURRENT DENSITY: 1.5 x 105 A/cm2 Metallization Mask Layout 80C86 AD11 AD12 AD13 AD14 GND VCC AD15 A16/S3 A17/S4 A18/S5 A19/S6 AD10 AD9 BHE/S7 MN/MX AD8 AD7 RD AD6 RQ/GT0 AD5 RQ/GT1 AD4 AD3 LOCK S2 AD2 AD1 S1 AD0 S0 NMI INTR CLK GND RESET READY TEST QS1 QS0 3-170 80C86 Instruction Set Summary INSTRUCTION CODE MNEMONIC AND DESCRIPTION 76543210 76543210 76543210 76543210 Register/Memory to/from Register 100010dw mod reg r/m Immediate to Register/Memory 1100011w mod 0 0 0 r/m data data if w 1 DATA TRANSFER MOV = MOVE: Immediate to Register 1 0 1 1 w reg data data if w 1 Memory to Accumulator 1010000w addr-low addr-high Accumulator to Memory 1010001w addr-low addr-high Register/Memory to Segment Register 10001110 mod 0 reg r/m Segment Register to Register/Memory 10001100 mod 0 reg r/m 11111111 mod 1 1 0 r/m PUSH = Push: Register/Memory Register Segment Register 0 1 0 1 0 reg 0 0 0 reg 1 1 0 POP = Pop: Register/Memory Register Segment Register 10001111 mod 0 0 0 r/m 0 1 0 1 1 reg 0 0 0 reg 1 1 1 XCHG = Exchange: Register/Memory with Register Register with Accumulator 1000011w mod reg r/m 1 0 0 1 0 reg IN = Input from: Fixed Port 1110010w Variable Port 1110110w port OUT = Output to: Fixed Port 1110011w Variable Port 1110111w port XLAT = Translate Byte to AL 11010111 LEA = Load EA to Register2 10001101 mod reg r/m LDS = Load Pointer to DS 11000101 mod reg r/m LES = Load Pointer to ES 11000100 mod reg r/m LAHF = Load AH with Flags 10011111 SAHF = Store AH into Flags 10011110 PUSHF = Push Flags 10011100 POPF = Pop Flags 10011101 ARITHMETIC ADD = Add: Register/Memory with Register to Either 000000dw mod reg r/m Immediate to Register/Memory 100000sw mod 0 0 0 r/m data Immediate to Accumulator 0000010w data data if w = 1 000100dw mod reg r/m ADC = Add with Carry: Register/Memory with Register to Either 3-171 data if s:w = 01 80C86 Instruction Set Summary (Continued) INSTRUCTION CODE MNEMONIC AND DESCRIPTION 76543210 76543210 76543210 76543210 Immediate to Register/Memory 100000sw mod 0 1 0 r/m data data if s:w = 01 Immediate to Accumulator 0001010w data data if w = 1 1111111w mod 0 0 0 r/m INC = Increment: Register/Memory Register 0 1 0 0 0 reg AAA = ASCll Adjust for Add 00110111 DAA = Decimal Adjust for Add 00100111 SUB = Subtract: Register/Memory and Register to Either 001010dw mod reg r/m Immediate from Register/Memory 100000sw mod 1 0 1 r/m data Immediate from Accumulator 0010110w data data if w = 1 Register/Memory and Register to Either 000110dw mod reg r/m Immediate from Register/Memory 100000sw mod 0 1 1 r/m data Immediate from Accumulator 0001110w data data if w = 1 1111111w mod 0 0 1 r/m data if s:w = 01 SBB = Subtract with Borrow data if s:w = 01 DEC = Decrement: Register/Memory Register NEG = Change Sign 0 1 0 0 1 reg 1111011w mod 0 1 1 r/m Register/Memory and Register 001110dw mod reg r/m Immediate with Register/Memory 100000sw mod 1 1 1 r/m data Immediate with Accumulator 0011110w data data if w = 1 AAS = ASCll Adjust for Subtract 00111111 DAS = Decimal Adjust for Subtract 00101111 MUL = Multiply (Unsigned) 1111011w mod 1 0 0 r/m IMUL = Integer Multiply (Signed) 1111011w mod 1 0 1 r/m AAM = ASCll Adjust for Multiply 11010100 00001010 DlV = Divide (Unsigned) 1111011w mod 1 1 0 r/m IDlV = Integer Divide (Signed) 1111011w mod 1 1 1 r/m AAD = ASClI Adjust for Divide 11010101 00001010 CBW = Convert Byte to Word 10011000 CWD = Convert Word to Double Word 10011001 CMP = Compare: LOGIC NOT = Invert 1111011w mod 0 1 0 r/m SHL/SAL = Shift Logical/Arithmetic Left 110100vw mod 1 0 0 r/m SHR = Shift Logical Right 110100vw mod 1 0 1 r/m SAR = Shift Arithmetic Right 110100vw mod 1 1 1 r/m ROL = Rotate Left 110100vw mod 0 0 0 r/m ROR = Rotate Right 110100vw mod 0 0 1 r/m RCL = Rotate Through Carry Flag Left 110100vw mod 0 1 0 r/m 3-172 data if s:w = 01 80C86 Instruction Set Summary (Continued) INSTRUCTION CODE MNEMONIC AND DESCRIPTION 76543210 76543210 110100vw mod 0 1 1 r/m Reg./Memory and Register to Either 0010000dw mod reg r/m Immediate to Register/Memory 1000000w Immediate to Accumulator 0010010w Register/Memory and Register 1000010w mod reg r/m Immediate Data and Register/Memory 1111011w mod 0 0 0 r/m data Immediate Data and Accumulator 1010100w data data if w = 1 Register/Memory and Register to Either 000010dw mod reg r/m Immediate to Register/Memory 1000000w mod 1 0 1 r/m data Immediate to Accumulator 0000110w data data if w = 1 Register/Memory and Register to Either 001100dw mod reg r/m Immediate to Register/Memory 1000000w mod 1 1 0 r/m data Immediate to Accumulator 0011010w data data if w = 1 disp-high RCR = Rotate Through Carry Right 76543210 76543210 mod 1 0 0 r/m data data if w = 1 data data if w = 1 AND = And: TEST = And Function to Flags, No Result: data if w = 1 OR = Or: data if w = 1 XOR = Exclusive or: STRING MANIPULATION REP = Repeat 1111001z MOVS = Move Byte/Word 1010010w CMPS = Compare Byte/Word 1010011w SCAS = Scan Byte/Word 1010111w LODS = Load Byte/Word to AL/AX 1010110w STOS = Stor Byte/Word from AL/A 1010101w CONTROL TRANSFER CALL = Call: Direct Within Segment 11101000 disp-low Indirect Within Segment 11111111 mod 0 1 0 r/m Direct Intersegment 10011010 offset-low offset-high seg-low seg-high Indirect Intersegment 11111111 mod 0 1 1 r/m Direct Within Segment 11101001 disp-low Direct Within Segment-Short 11101011 disp Indirect Within Segment 11111111 mod 1 0 0 r/m Direct Intersegment 11101010 offset-low offset-high seg-low seg-high JMP = Unconditional Jump: Indirect Intersegment 11111111 disp-high mod 1 0 1 r/m RET = Return from CALL: Within Segment 11000011 Within Seg Adding lmmed to SP 11000010 3-173 data-low data-high data if w = 1 80C86 Instruction Set Summary (Continued) INSTRUCTION CODE MNEMONIC AND DESCRIPTION 76543210 76543210 76543210 11001010 data-low data-high JE/JZ = Jump on Equal/Zero 01110100 disp JL/JNGE = Jump on Less/Not Greater or Equal 01111100 disp JLE/JNG = Jump on Less or Equal/ Not Greater 01111110 disp JB/JNAE = Jump on Below/Not Above or Equal 01110010 disp JBE/JNA = Jump on Below or Equal/Not Above 01110110 disp Intersegment 11001011 Intersegment Adding Immediate to SP JP/JPE = Jump on Parity/Parity Even 01111010 disp JO = Jump on Overflow 01110000 disp JS = Jump on Sign 01111000 disp JNE/JNZ = Jump on Not Equal/Not Zero 01110101 disp JNL/JGE = Jump on Not Less/Greater or Equal 01111101 disp JNLE/JG = Jump on Not Less or Equal/Greater 01111111 disp JNB/JAE = Jump on Not Below/Above or Equal 01110011 disp JNBE/JA = Jump on Not Below or Equal/Above 01110111 disp JNP/JPO = Jump on Not Par/Par Odd 01111011 disp JNO = Jump on Not Overflow 01110001 disp JNS = Jump on Not Sign 01111001 disp LOOP = Loop CX Times 11100010 disp LOOPZ/LOOPE = Loop While Zero/Equal 11100001 disp LOOPNZ/LOOPNE = Loop While Not Zero/Equal 11100000 disp JCXZ = Jump on CX Zero 11100011 disp Type Specified 11001101 type Type 3 11001100 INTO = Interrupt on Overflow 11001110 IRET = Interrupt Return 11001111 INT = Interrupt PROCESSOR CONTROL CLC = Clear Carry 11111000 CMC = Complement Carry 11110101 STC = Set Carry 11111001 CLD = Clear Direction 11111100 STD = Set Direction 11111101 CLl = Clear Interrupt 11111010 ST = Set Interrupt 11111011 HLT = Halt 11110100 WAIT = Wait 10011011 ESC = Escape (to External Device) 11011xxx LOCK = Bus Lock Prefix 11110000 3-174 mod x x x r/m 76543210 80C86 Instruction Set Summary (Continued) INSTRUCTION CODE MNEMONIC AND DESCRIPTION 76543210 NOTES: AL = 8-bit accumulator AX = 16-bit accumulator CX = Count register DS= Data segment ES = Extra segment Above/below refers to unsigned value. Greater = more positive; Less = less positive (more negative) signed values if d = 1 then "to" reg; if d = 0 then "from" reg if w = 1 then word instruction; if w = 0 then byte instruction if mod = 11 then r/m is treated as a REG field if mod = 00 then DISP = O, disp-low and disp-high are absent if mod = 01 then DISP = disp-low sign-extended 16-bits, disp-high is absent if mod = 10 then DISP = disp-high:disp-low if r/m = 000 then EA = (BX) + (SI) + DISP if r/m = 001 then EA = (BX) + (DI) + DISP if r/m = 010 then EA = (BP) + (SI) + DISP if r/m = 011 then EA = (BP) + (DI) + DISP if r/m = 100 then EA = (SI) + DISP if r/m = 101 then EA = (DI) + DISP if r/m = 110 then EA = (BP) + DISP if r/m = 111 then EA = (BX) + DISP DISP follows 2nd byte of instruction (before data if required) except if mod = 00 and r/m = 110 then EA = disp-high: disp-low. MOV CS, REG/MEMORY not allowed. 76543210 76543210 76543210 if s:w = 01 then 16-bits of immediate data form the operand. if s:w. = 11 then an immediate data byte is sign extended to form the 16-bit operand. if v = 0 then "count" = 1; if v = 1 then "count" in (CL) x = don't care z is used for string primitives for comparison with ZF FLAG. SEGMENT OVERRIDE PREFIX 001 reg 11 0 REG is assigned according to the following table: 16-BIT (w = 1) 8-BIT (w = 0) SEGMENT 000 AX 000 AL 00 ES 001 CX 001 CL 01 CS 010 DX 010 DL 10 SS 011 BX 011 BL 11 DS 100 SP 100 AH 00 ES 101 BP 101 CH 00 ES 110 SI 110 DH 00 ES 111 DI 111 BH 00 ES Instructions which reference the flag register file as a 16-bit object use the symbol FLAGS to represent the file: FLAGS = X:X:X:X:(OF):(DF):(IF):(TF):(SF):(ZF):X:(AF):X:(PF):X:(CF) Mnemonics Intel, 1978 3-175