IN90S2333DW, IN90LS2333DW,
1
8-BIT MICROCONTROLLER WITH 2K/4K BYTES
BUILD-IN PROGRAMMABLE FLASH
Description
The IN90S2333 is a low-power CMOS 8-bit
microcontroller based on the AVR RISC architecture. By
executing powerful instructions in a single clock cycle, the
IN90S2333 achieves throughputs approaching 1 MIPS
per MHz allowing the system designer to optimize power
consumption versus processing speed.
1
28
The AVR core combines a rich instruction set with 32 general purpose working
registers. All the 32 registers are directly connected to the Arithmetic Logic Unit (ALU),
allowing two independent registers to be accessed in one single instruction executed in
one clock cycle. The resulting architecture is more code efficient while achieving
throughputs up to ten times faster than conventional CISC microcontrollers.
The AT90S2333/4433 provides the following features: 2K/4K bytes of In-System
Programmable Flash, 128/256 bytes EEPROM, 128 bytes SRAM, 20 general purpose I/O
lines, 32 general purpose working registers, two flexible timer/counters with compare
modes, internal and external interrupts, a programmable serial UART, 6-channel, 10-bit
ADC, programmable Watchdog Timer with internal oscillator, an SPI serial port and two
software selectable power saving modes. The Idle mode stops the CPU while allowing the
SRAM, timer/counters, SPI port and interrupt system to continue functioning. The Power
Down mode saves the register contents but freezes the oscillator, disabling all other chip
functions until the next interrupt or hardware reset.
The device is manufactured using Atmel’s high density nonvolatile memory
technology. The on-chip Flash program memory can be reprogrammed in-system through
an SPI serial interface or by a conventional nonvolatile memory programmer. By
combining a RISC 8-bit CPU with In-System Programmable Flash on a monolithic chip, the
Atmel AT90S2333/4433 is a powerful microcontroller that provides a highly flexible and
cost effective solution to many embedded control applications. The AT90S2333/4433 AVR
is supported with a full suite of program and system development tools including: C
compilers, macro assemblers, program debugger/simulators, in-circuit emulators, and
evaluation kits.
IN90S2333DW, IN90LS2333DW,
2
Features
High-performance and Low-power AVR® 8-bit RISC Architecture
118 Powerful Instructions - Most Single Cycle Execution
32 x 8 General Purpose Working Registers
Up to 8 MIPS Throughput at 8 MHz
Data and Nonvolatile Program Memory
2K/4K Bytes of In-System Programmable Flash Endurance 1,000 Write/Erase Cycles
128 Bytes of SRAM
128/256 Bytes of In-System Programmable EEPROM Endurance: 100,000 Write/Erase Cycles
Programming Lock for Flash Program and EEPROM Data Security
Peripheral Features
One 8-bit Timer/Counter with Separate Prescaler
Expanded 16-bit Timer/Counter with Separate Prescaler, Compare, Capture Modes and 8-, 9- or
10-bit PWM
On-chip Analog Comparator
Programmable Watchdog Timer with Separate On-chip Oscillator
Programmable UART
6-channel, 10-bit ADC
Master/Slave SPI Serial Interface
Special Microcontroller Features
Brown-Out Reset Circuit
Enhanced Power-on Reset Circuit
Low-Power Idle and Power Down Modes
External and Internal Interrupt Sources
Specifications
Low-power, High-speed CMOS Process Technology
Fully Static Operation
Power Consumption at 4 MHz, 3V, 25oC
Active: 3.4 mA
Idle Mode: 1.4 mA
Power Down Mode: <1 µA
I/O and Packages
20 Programmable I/O Lines
28-pin PDIP and 32-pin TQFP
Operating Voltage
2.7V - 6.0V (IN90LS2333)
4.0V - 6.0V (IN90S2333 )
Speed Grades
0 - 4 MHz (IN90LS2333 )
0 - 8 MHz (IN90S2333 )
IN90S2333DW, IN90LS2333DW,
3
Block Diagram
IN90S2333DW, IN90LS2333DW,
4
Pin Descriptions
VCC
Supply voltage
GND
Ground
Port B (PB5..PB0)
Port B is a 6-bit bi-directional I/O port with internal pullup resistors.
The Port B output buffers can sink 20 mA. As inputs, Port B pins that
are externally pulled low will source current if the pull-up resistors are
activated.
Port B also serves the functions of various special features of the IN90S2333.
The port B pins are tristated when a reset condition becomes active, even if the clock is not running.
Port C (PC5..PC0)
Port C is a 6-bit bi-directional I/O port with internal pullup resistors. The Port C output buffers can sink 20
mA. As inputs, Port C pins that are externally pulled low will source current if the pull-up resistors are
activated. Port C also serves as the analog inputs to the A/D Converter.
The port C pins are tristated when a reset condition becomes active, even if the clock is not running.
Port D (PD7..PD0)
Port D is an 8-bit bi-directional I/O port with internal pull-up resistors. The Port D output buffers can sink
20 mA. As inputs, Port D pins that are externally pulled low will source current if the pull-up resistors are
activated.
Port D also serves the functions of various special features of the IN90S2333
The port D pins are tristated when a reset condition becomes active, even if the clock is not running.
RESET
Reset input. An external reset is generated by a low level on the RESET pin. Reset pulses longer than 50
ns will generate a reset, even if the clock is not running. Shorter pulses are not guaranteed to generate a
reset.
XTAL1
Input to the inverting oscillator amplifier and input to the internal clock operating circuit.
XTAL2
Output from the inverting oscillator amplifier
AVCC via a low-pass filter. See
This is the supply voltage pin for the A/D Converter. It should be externally connected to VCC
Datasheet for details on operation of the ADC.
AREF
This is the analog reference input for the A/D Converter. For ADC operations, a voltage in the range 2.7V
to AVCC must be applied to this pin.
IN90S2333DW, IN90LS2333DW,
5
AGND
If the board has a separate analog ground plane, this pin should be connected to this ground plane.
Otherwise, connect to GND.
Architectural Overview
The fast-access register file concept contains 32 x 8-bit general purpose working registers with a single
clock cycle access time. This means that during one single clock cycle, one Arithmetic Logic Unit (ALU)
operation is executed. Two operands are output from the register file, the operation is executed, and the
result is stored back in the register file - in one clock cycle.
Six of the 32 registers can be used as three 16-bits indirect address register pointers for Data Space
addressing - enabling efficient address calculations. One of the three address pointers is also used as the
address pointer for the constant table look up function. These added function registers are the 16-bits X-
register, Y-register and Z-register.
The ALU supports arithmetic and logic functions between registers or between a constant and a register.
Single register operations are also executed in the ALU. In addition to the register operation, the
conventional memory addressing modes can be used on the register file as well. This is enabled by the
fact that the register file is assigned the 32 lowermost Data Space addresses ($00 - $1F), allowing them
to be accessed as though they were ordinary memory locations.
AVR IN90S2333 Architecture
IN90S2333DW, IN90LS2333DW,
6
The I/O memory space contains 64 addresses for CPU peripheral functions as Control Registers,
Timer/Counters, A/D-converters, and other I/O functions. The I/O Memory can be accessed directly, or as
the Data Space locations following those of the register file, $20 - $5F.
The AVR uses a Harvard architecture concept - with separate memories and buses for program and data.
The program memory is executed with a two stage pipeline. While one instruction is being executed, the
next instruction is pre-fetched from the program memory. This concept enables instructions to be
executed in every clock cycle.
The program memory is In-System Programmable Flash memory.
With the relative jump and call instructions, the whole 1K/2K word address space is directly accessed.
Most AVR instructions have a single 16-bit word format. Every program memory address contains a 16-
or 32-bit instruction.
During interrupts and subroutine calls, the return address program counter (PC) is stored on the stack.
The stack is effectively allocated in the general data SRAM, and consequently the stack size is only
limited by the total SRAM size and the usage of the SRAM. All user programs must initialize the SP in the
reset routine (before subroutines or interrupts are executed). The 8-bit stack pointer SP is read/write
accessible in the I/O space.
The 128 bytes data SRAM can be easily accessed through the five different addressing modes supported
in the AVR architecture.
The memory spaces in the AVR architecture are all linear and regular memory maps.
Memory Map
A flexible interrupt module has its control registers in the I/O space with an additional global interrupt
enable bit in the status register. All the different interrupts have a separate interrupt vector in the interrupt
vector table at the beginning of the program memory. The different interrupts have priority in accordance
with their interrupt vector position. The lower the interrupt vector address, the higher the priority.
IN90S2333DW, IN90LS2333DW,
7
Register Summary
Address Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
$3F ($5F) SREG I T H S V N Z C
$3E ($5E) Reserved - - - - - - - -
$3D ($5D) SP SP7 SP6 SP5 SP4 SP3 SP2 SP1 SP0
$3C ($5C) Reserved
$3B ($5B) GIMSK INT1 INT0 - - - - - -
$3A ($5A) GIFR INTF1 INTF0
$39 ($59) TIMSK TOIE1 OCIE1 - -
TICIE1 - TOIE0 -
$38 ($58) TIFR TOV1 OCF1 - -
ICF1 - TOV0 -
$37 ($57) Reserved
$36 ($56) Reserved
$35 ($55) MCUCR - SE SM ISC11 ISC10 ISC01 ISC00
$34 ($54) MCUSR - - - - WDRF BORF EXTRF PORF
$33 ($53) TCCR0 - - - - - CS02 CS01 CS00
$32 ($52) TCNT0 Timer/Counter0 (8 Bits)
$31 ($51) Reserved
$30 ($50) Reserved
$2F ($4F) TCCR1A COM1
1
COM10 - - - - PWM11 PWM10
$2E ($4E) TCCR1B ICNC1 ICES1 - - CTC1 CS12 CS11 CS10
$2D ($4D) TCNT1H Timer/Counter1 - Counter Register High Byte
$2C ($4C) TCNT1L Timer/Counter1 - Counter Register Low Byte
$2B ($4B) OCR1H Timer/Counter1 - Output Compare Register High Byte
$2A ($4A) OCR1L Timer/Counter1 - Output Compare Register Low Byte
$29 ($49) Reserved
$28 ($48) Reserved
$27 ($47) ICR1H Timer/Counter1 - Input Capture Register High Byte
$26 ($46) ICR1L Timer/Counter1 - Input Capture Register Low Byte
$25 ($45) Reserved
$24 ($44) Reserved
$23 ($43) Reserved
$22 ($42) Reserved
$21 ($41) WDTCR - - - WDTOE WDE WDP2 WDP1 WDP0
$20 ($40) Reserved
$1F ($3F) Reserved
$1E ($3E) EEAR EEPROM Address Register
$1D ($3D) EEDR EEPROM Data Register
$1C ($3C) EECR - - - - EERIE EEMWE EEWE EERE
$1B ($3B) Reserved
$1A ($3A) Reserved
$19 ($39) Reserved
$18 ($38) PORTB - - PORTB5 PORTB4 PORTB3 PORTB2 PORTB1 PORTB0
$17 ($37) DDRB - - DDB5 DDB4 DDB3 DDB2 DDB1 DDB0
$16 ($36) PINB - - PINB5 PINB4 PINB3 PINB2 PINB1 PINB0
$15 ($35) PORTC - - PORTC5 PORTC4 PORTC3 PORTC2 PORTC1 PORTC0
$14 ($34) DDRC - - DDC5 DDC4 DDC3 DDC2 DDC1 DDC0
$13 ($33) PINC - - PINC5 PINC4 PINC3 PINC2 PINC1 PINC0
$12 ($32) PORTD PORT
D7
PORTD6 PORTD5 PORTD4 PORTD3 PORTD2 PORTD1 PORTD0
$11 ($31) DDRD DDD7 DDD6 DDD5 DDD4 DDD3 DDD2 DDD1 DDD0
$10 ($30) PIND PIND7 PIND6 PIND5 PIND4 PIND3 PIND2 PIND1 PIND0
$0F ($2F) SPDR SPI Data Register
$0E ($2E) SPSR SPIF WCOL - - - - - -
$0D ($2D) SPCR SPIE SPE DORD MSTR CPOL CPHA SPR1 SPR0
$0C ($2C) UDR UART I/O Data Register
IN90S2333DW, IN90LS2333DW,
8
Register Summary (Continued)
Address Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
$0B ($2B) UCSRA RXC TXC UDRE FE OR - - -
$0A ($2A) UCSRB RXCIE TXCIE UDRIE RXEN TXEN CHR9 RXB8 TXB8
$09 ($29) UBRR UART Baud Rate Register
$08 ($28) ACSR ACD AINBG ACO ACI ACIE ACIC ACIS1 ACIS0
$07 ($27) ADMUX - ADCBG - - - MUX2 MUX1 MUX0
$06 ($26) ADCSR ADEN ADSC ADFR ADIF ADIE ADPS2 ADPS1 ADPS0
$05 ($25) ADCH - - - - - - ADC9 ADC8
$04 ($24) ADCL ADC7 ADC6 ADC5 ADC4 ADC3 ADC2 ADC1 ADC0
$03 ($23) UBRRHI UART Baud Rate Register High
$02 ($22) Reserved
$01 ($21) Reserved
$00 ($20) Reserved
Notes: 1. For compatibility with future devices, reserved bits should be written to zero if accessed. Reserved I/O
memory addresses should never be written.
2. Some of the status flags are cleared by writing a logical one to them. Note that the CBI and SBI instructions
will operate on all bits in the I/O register, writing a one back into any flag read as set, thus clearing the flag.
The CBI and SBI instructions work with registers $00 to $1F only.
Instruction Set Summary
Mnemonics Operands Description Operation Flags #Cloc
ks
ARITHMETIC AND LOGIC INSTRUCTIONS
ADD Rd, Rr Add two Registers Rd Rd + Rr Z,C,N,V,H 1
ADC Rd, Rr Add with Carry two Registers Rd Rd + Rr + C Z,C,N,V,H 1
ADIW Rdl,K Add Immediate to Word Rdh:Rdl Rdh:Rdl + K Z,C,N,V,S 2
SUB Rd, Rr Subtract two Registers Rd Rd - Rr Z,C,N,V,H 1
SUBI Rd, K Subtract Constant from Register Rd Rd - K Z,C,N,V,H 1
SBC Rd, Rr Subtract with Carry two Registers Rd Rd - Rr - C Z,C,N,V,H 1
SBCI Rd, K Subtract with Carry Constant from
Reg.
Rd Rd - K - C Z,C,N,V,H 1
SBIW Rdl,K Subtract Immediate from Word Rdh:Rdl Rdh:Rdl - K Z,C,N,V,S 2
AND Rd, Rr Logical AND Registers Rd Rd Rr Z,N,V 1
ANDI Rd, K Logical AND Register and Constant Rd Rd K Z,N,V 1
OR Rd, Rr Logical OR Registers Rd Rd v Rr Z,N,V 1
ORI Rd, K Logical OR Register and Constant Rd Rd v K Z,N,V 1
EOR Rd, Rr Exclusive OR Registers Rd Rd Rr Z,N,V 1
COM Rd One’s Complement Rd $FF - Rd Z,C,N,V 1
NEG Rd Two’s Complement Rd $00 - Rd Z,C,N,V,H 1
SBR Rd,K Set Bit(s) in Register Rd Rd v K Z,N,V 1
CBR Rd,K Clear Bit(s) in Register Rd Rd ($FF - K) Z,N,V 1
INC Rd Increment Rd Rd + 1 Z,N,V 1
DEC Rd Decrement Rd Rd - 1 Z,N,V 1
TST Rd Test for Zero or Minus Rd Rd Rd Z,N,V 1
CLR Rd Clear Register Rd Rd Rd Z,N,V 1
SER Rd Set Register Rd $FF None 1
BRANCH INSTRUCTIONS
RJMP k Relative Jump PC PC + k + 1 None 2
IJMP Indirect Jump to (Z) PC Z None 2
RCALL k Relative Subroutine Call PC PC + k + 1 None 3
ICALL Indirect Call to (Z) PC Z None 3
RET Subroutine Return PC STACK None 4
RETI Interrupt Return PC STACK I 4
IN90S2333DW, IN90LS2333DW,
9
Instruction Set Summary (Continued)
Mnemonics Operands Description OPERATION Flags #Cloc
ks
CPSE Rd,Rr Compare, Skip if Equal if (Rd = Rr) PC PC + 2 or 3 None 1 / 2 /
3
CP Rd,Rr Compare Rd - Rr Z, N,V,C,H 1
CPC Rd,Rr Compare with Carry Rd - Rr - C Z, N,V,C,H 1
CPI Rd,K Compare Register with Immediate Rd - K Z, N,V,C,H 1
SBRC Rr, b Skip if Bit in Register Cleared if (Rr(b)=0) PC PC + 2 or 3 None 1 / 2 /
3
SBRS Rr, b Skip if Bit in Register is Set if (Rr(b)=1) PC PC + 2 or 3 None 1 / 2 /
3
SBIC P, b Skip if Bit in I/O Register Cleared if (P(b)=0) PC PC + 2 or 3 None 1 / 2 /
3
SBIS P, b Skip if Bit in I/O Register is Set if (P(b)=1) PC PC + 2 or 3 None 1 / 2 /
3
BRBS s, k Branch if Status Flag Set if (SREG(s) = 1) then PCPC+k +
1
None 1 / 2
BRBC s, k Branch if Status Flag Cleared if (SREG(s) = 0) then PCPC+k +
1
None 1 / 2
BREQ k Branch if Equal if (Z = 1) then PC PC + k + 1 None 1 / 2
BRNE k Branch if Not Equal if (Z = 0) then PC PC + k + 1 None 1 / 2
BRCS k Branch if Carry Set if (C = 1) then PC PC + k + 1 None 1 / 2
BRCC k Branch if Carry Cleared if (C = 0) then PC PC + k + 1 None 1 / 2
BRSH k Branch if Same or Higher if (C = 0) then PC PC + k + 1 None 1 / 2
BRLO k Branch if Lower if (C = 1) then PC PC + k + 1 None 1 / 2
BRMI k Branch if Minus if (N = 1) then PC PC + k + 1 None 1 / 2
BRPL k Branch if Plus if (N = 0) then PC PC + k + 1 None 1 / 2
BRGE k Branch if Greater or Equal, Signed if (N  V= 0) then PC PC + k + 1 None 1 / 2
BRLT k Branch if Less Than Zero, Signed if (N  V= 1) then PC PC + k + 1 None 1 / 2
BRHS k Branch if Half Carry Flag Set if (H = 1) then PC PC + k + 1 None 1 / 2
BRHC k Branch if Half Carry Flag Cleared if (H = 0) then PC PC + k + 1 None 1 / 2
BRTS k Branch if T Flag Set if (T = 1) then PC PC + k+ 1
None
1 / 2
BRTC k Branch if T Flag Cleared if (T = 0) then PC PC + k + 1 None 1 / 2
BRVS k Branch if Overflow Flag is Set if (V = 1) then PC PC + k + 1 None 1 / 2
BRVC k Branch if Overflow Flag is Cleared if (V = 0) then PC PC + k + 1 None 1 / 2
BRIE k Branch if Interrupt Enabled if ( I = 1) then PC PC + k + 1 None 1 / 2
BRID k Branch if Interrupt Disabled if ( I = 0) then PC PC + k + 1 None 1 / 2
DATA TRANSFER INSTRUCTIONS
MOV Rd, Rr Move Between Registers Rd Rr None 1
LDI Rd, K Load Immediate Rd K None 1
LD Rd, X Load Indirect Rd (X) None 2
LD Rd, X+ Load Indirect and Post-Inc. Rd (X), X X + 1 None 2
LD Rd, - X Load Indirect and Pre-Dec. X X - 1, Rd (X) None 2
LD Rd, Y Load Indirect Rd (Y) None 2
LD Rd, Y+ Load Indirect and Post-Inc. Rd (Y), Y Y + 1 None 2
LD Rd, - Y Load Indirect and Pre-Dec. Y Y - 1, Rd (Y) None 2
LDD Rd,Y+q Load Indirect with Displacement Rd (Y + q) None 2
LD Rd, Z Load Indirect Rd (Z) None 2
LD Rd, Z+ Load Indirect and Post-Inc. Rd (Z), Z Z+1 None 2
LD Rd, -Z Load Indirect and Pre-Dec. Z Z - 1, Rd (Z) None 2
LDD Rd, Z+q Load Indirect with Displacement Rd (Z + q) None 2
LDS Rd, k Load Direct from SRAM Rd (k) None 2
ST X, Rr Store Indirect (X) Rr None 2
ST X+, Rr Store Indirect and Post-Inc. (X) Rr, X X + 1 None 2
ST - X, Rr Store Indirect and Pre-Dec. X X - 1, (X) Rr None 2
ST Y, Rr Store Indirect (Y) Rr None 2
IN90S2333DW, IN90LS2333DW,
10
ST Y+, Rr Store Indirect and Post-Inc. (Y) Rr, Y Y + 1 None 2
ST - Y, Rr Store Indirect and Pre-Dec. Y Y - 1, (Y) Rr None 2
STD Y+q,Rr Store Indirect with Displacement (Y + q) Rr None 2
IN90S2333DW, IN90LS2333DW,
11
Instruction Set Summary (Continued)
Mnemonics Operands Description OPERATION Flags #Cloc
ks
ST Z, Rr Store Indirect (Z) Rr None 2
ST Z+, Rr Store Indirect and Post-Inc. (Z) Rr, Z Z + 1 None 2
ST -Z, Rr Store Indirect and Pre-Dec. Z Z - 1, (Z) Rr None 2
STD Z+q,Rr Store Indirect with Displacement (Z + q) Rr None 2
STS k, Rr Store Direct to SRAM (k) Rr None 2
LPM Load Program Memory R0 (Z) None 3
IN Rd, P In Port Rd P None 1
OUT P, Rr Out Port P Rr None 1
PUSH Rr Push Register on Stack STACK Rr None 2
POP Rd Pop Register from Stack Rd STACK None 2
BIT AND BIT-TEST INSTRUCTIONS
SBI P,b Set Bit in I/O Register I/O(P,b) 1 None 2
CBI P,b Clear Bit in I/O Register I/O(P,b) 0 None 2
LSL Rd Logical Shift Left Rd(n+1) Rd(n), Rd(0) 0 Z,C,N,V 1
LSR Rd Logical Shift Right Rd(n) Rd(n+1), Rd(7) 0 Z,C,N,V 1
ROL Rd Rotate Left Through Carry Rd(0)C,Rd(n+1)
Rd(n),CRd(7)
Z,C,N,V 1
ROR Rd Rotate Right Through Carry Rd(7)C,Rd(n)
Rd(n+1),CRd(0)
Z,C,N,V 1
ASR Rd Arithmetic Shift Right Rd(n) Rd(n+1), n=0..6 Z,C,N,V 1
SWAP Rd Swap Nibbles Rd(3..0)Rd(7..4),Rd(7..4)Rd(3..
0)
None 1
BSET s Flag Set SREG(s) 1 SREG(s) 1
BCLR s Flag Clear SREG(s) 0 SREG(s) 1
BST Rr, b Bit Store from Register to T T Rr(b) T 1
BLD Rd, b Bit load from T to Register Rd(b) T None 1
SEC Set Carry C 1 C 1
CLC Clear Carry C 0 C 1
SEN Set Negative Flag N 1 N 1
CLN Clear Negative Flag N 0 N 1
SEZ Set Zero Flag Z 1 Z 1
CLZ Clear Zero Flag Z 0 Z 1
SEI Global Interrupt Enable I 1 I 1
CLI Global Interrupt Disable I 0 I 1
SES Set Signed Test Flag S 1 S 1
CLS Clear Signed Test Flag S 0 S 1
SEV Set Twos Complement Overflow. V 1 V 1
CLV Clear Twos Complement Overflow V 0 V 1
SET Set T in SREG T 1 T 1
CLT Clear T in SREG T 0 T 1
SEH Set Half Carry Flag in SREG H 1 H 1
CLH Clear Half Carry Flag in SREG H 0 H 1
NOP No Operation None 1
SLEEP Sleep (see specific descr. for Sleep function) None 3
WDR Watchdog Reset (see specific descr. for WDR/timer) None 1
IN90S2333DW, IN90LS2333DW,
12
Package Overall Dimensions
D
E
A
A
1
CM
H
e
B
h x 45°
0.25 (0.010) M T
-T-
01
28
14
15
e
1
L
C
α
A A1 B C D E e e2 H h L
α
mm deg
ree
min 2.35 0.05 0.35 0.14 17.7 8.23 11.5 0.25 0.40 0
max 3.05 0.35 0.50 0.32 18.5 8.90
1.27
(nom
)
11.4
3
(nom
)
12.7 0.75 1.27 8
SO - package MS-013AE