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rite Register 0 (non-multiplexed bus mode) Write Register 1 D7 D6 D5 D4 D3 D2 D1 D0 D7 D6 D5 D4 D3 D2 D1 D0 Ext Int Enable 0 0 0 Register 0 0 0 1 Register 1 0 1 0 Register 2 0 1 1 Register 3 1 0 0 Register 4 1 0 1 Register 5 1 1 0 Register 6 1 1 1 Register 7 0 0 0 Register 8 0 0 1 Register 9 0 1 0 Register 10 0 1 1 Register 11 * 1 0 0 Register 12 1 0 1 Register 13 1 1 0 Register 14 1 1 Register 15 Null Code Point High Reset Ext/Status Interrupts Send Abort (SDLC) Enable Int on Next Rx Character Reset Tx Int Pending Error Reset Reset Highest IUS 0 0 1 1 0 1 0 1 Tx Int Enable Parity is Special Condition 0 0 1 1 0 1 0 1 Rx Int Disable Rx Int on First Character or Special Condition Int on all Rx Characters or Special Condition Rx Int on Special Condition Only WAIT/DMA Request on Receive /Transmit WAIT/DMA Request Function WAIT/DMA Request 0 0 0 0 0 1 0 1 0 0 1 1 1 0 0 1 0 1 1 1 0 1 1 1 Null Code Reset Rx CRC Checker Reset Tx CRC Generator Reset Tx Underrun/EOM Latch Write Register 2 D7 D6 D5 D4 D3 D2 D1 D0 V0 V1 V2 V3 V4 * With Point High Command Interrupt Vector V5 V6 Write Register 0 (multiplexed bus mode) V7 D7 D6 D5 D4 D3 D2 D1 D0 Write Register 3 0 0 1 1 0 1 0 1 Null Code Null Code Select Shift Left Mode Select Shift Right Mode D7 D6 D5 D4 D3 D2 D1 D0 * Rx Enable Sync Character Load Inhibit 0 0 0 0 0 1 1 1 1 0 0 1 1 0 1 0 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 Null Code Null Code Reset Ext/Status Interrupts Send Abort Enable Int on Next Rx Character Reset Tx Int Pending Error Reset Reset Highest IUS Null Code Reset Rx CRC Checker Reset Tx CRC Checker Reset Tx Underrun/EOM Latch Address Search Mode (SDLC) Rx CRC Enable Enter Hunt Mode Auto Enables 0 0 1 1 0 1 0 1 Rx 5 Bits/Character Rx 7 Bits/Character Rx 6 Bits/Character Rx 8 Bits/Character * B Channel Only )LJXUH :ULWH5HJLVWHU%LW)XQFWLRQV 36 )XQFWLRQDO'HVFULSWLRQ =&=&&0266&& 6HULDO&RPPXQLFDWLRQV&RQWUROOHU Write Register 4 Write Register 5 D7 D6 D5 D4 D3 D2 D1 D0 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 D7 D6 D5 D4 D3 D2 D1 D0 Parity Enable Tx CRC Enable Parity EVEN/ODD RTS SDLC/CRC-16 Sync Modes Enable 1 Stop Bit/Character 1 1/2 Stop Bits/Character 2 Stop Bits/Character 8-Bit Sync Character 16-Bit Sync Character SDLC Mode (01111110 Flag) External Sync Mode Tx Enable Send Break 0 0 1 1 0 1 0 1 Tx 5 Bits (or Less)/Character Tx 7 Bits/Character Tx 6 Bits/Character Tx 8 Bits/Character DTR 0 0 1 1 0 X1 Clock Mode 1 X16 Clock Mode 0 X32 Clock Mode 1 X64 Clock Mode )LJXUH :ULWH5HJLVWHU%LW)XQFWLRQV )XQFWLRQDO'HVFULSWLRQ 36 =&=&&0266&& 6HULDO&RPPXQLFDWLRQV&RQWUROOHU Write Register 6 D7 D6 D5 D4 D3 D2 D1 D0 Sync7 Sync1 Sync7 Sync3 ADR7 ADR7 Sync6 Sync0 Sync6 Sync2 ADR6 ADR6 Sync5 Sync5 Sync5 Sync1 ADR5 ADR5 Sync4 Sync4 Sync4 Sync0 ADR4 ADR4 Sync3 Sync3 Sync3 1 ADR3 x Sync2 Sync2 Sync2 1 ADR2 x Sync1 Sync1 Sync1 1 ADR1 x Sync0 Sync0 Sync0 1 ADR0 x Monosync, 8 Bits Monosync, 6 Bits Bisync, 16 Bits Bisync, 12 Bits SDLC SDLC (Address Range) Write Register 7 D7 D6 D5 D4 D3 D2 D1 D0 Sync7 Sync6 Sync5 Sync4 Sync15 Sync14 Sync11 Sync10 1 0 Sync5 Sync3 Sync13 Sync9 1 Sync4 Sync2 Sync12 Sync8 1 Sync3 Sync1 Sync11 Sync7 1 Sync2 Sync1 Sync0 x Sync0 x Sync10 Sync9 Sync8 Sync6 Sync5 Sync4 1 1 0 Monosync, 8 Bits Monosync, 6 Bits Bisync, 16 Bits Bisync, 12 Bits SDLC WR 7' Prime (85C30 only) D7 D6 D5 D4 D3 D2 D1 D0 Auto Tx Flag Auto EOM Reset Auto RTS Deactivation Force TxD High DTR/REQ Fast Mode Complete CRC Reception Extended Read Enable Reserved (Program as 0) )LJXUH :ULWH5HJLVWHU%LW)XQFWLRQV 36 )XQFWLRQDO'HVFULSWLRQ =&=&&0266&& 6HULDO&RPPXQLFDWLRQV&RQWUROOHU Write Register 9 Write Register 9 D7 D6 D5 D4 D3 D2 D1 D0 0 0 1 1 0 1 0 1 D7 D6 D5 D4 D3 D2 D1 D0 VIS TC0 NV TC1 DLC TC2 MIE TC3 Status High/Status Low TC4 Software INTACK Enable TC5 Lower Byte of Time Constant TC6 No Reset Channel Reset B Channel Reset A Force Hardware Reset TC7 Write Register 13 D7 D6 D5 D4 D3 D2 D1 D0 Write Register 9 D7 D6 D5 D4 D3 D2 D1 D0 TC8 TC9 0 0 1 1 6-Bit/8-Bit Sync TC10 Loop Mode TC11 Abort/Flag on Underrun TC12 Mark/Flag Idle TC13 Go Active on Poll TC14 Upper Byte of Time Constant TC15 0 NRZ 1 NRZI 0 FM1 (Transition = 1) 1 FM1 (Transition = 0) Write Register 14 D7 D6 D5 D4 D3 D2 D1 D0 CRC Preset I/O BR Generator Enable Write Register 11 BR Generator Source D7 D6 D5 D4 D3 D2 D1 D0 DTR/Request Function Auto Echo 0 0 1 1 0 1 0 1 TRxC Out = Xtal Output TRxC Out = Transmit Clock TRxC Out = BR Generator Output TRxC Out = DPLL Output TRxC O/I 0 0 1 1 0 Transmit Clock = RTxC Pin 1 Transmit Clock = TRxC Pin 0 Transmit Clock = BR Generator Output 1 Transmit Clock = DPLL Output Local Loopback 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 Null Command Enter Search Mode Reset Missing Clock Disable DPLL Set Source = BR Generator Set Source = RTxC Set FM Mode Set NRZI Mode Write Register 15 0 0 1 1 0 Receive Clock = RTxC Pin 1 Receive Clock = TRxC Pin 0 Receive Clock = BR Generator Output 1 Receive Clock = DPLL Output D7 D6 D5 D4 D3 D2 D1 D0 RTxC Xtal/No Xtal 0 Zero Count IE SDLC FIFO Enable DCD IE Sync/Hunt IE CTS IE Tx Underrun/EOM IE Break/Abort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ead Register 3 Read Register 0 D7 D6 D5 D4 D3 D2 D1 D0 D7 D6 D5 D4 D3 D2 D1 D0 Rx Character Available Channel B Ext/Status IP Zero Count Channel B Tx IP Tx Buffer Empty Channel B Rx IP DCD Channel A Ext/Status IP Sync/Hunt Channel A Tx IP CTS Channel A Rx IP Tx Underrun/EOM 0 Break/Abort 0 * * Always 0 in B Channel Read Register 1 D7 D6 D5 D4 D3 D2 D1 D0 Read Register 10 D7 D6 D5 D4 D3 D2 D1 D0 All Sent Residue Code 2 0 Residue Code 1 On Loop Residue Code 0 0 Parity Error 0 Rx Overrun Error Loop Sending CRC/Framing Error 0 End of Frame (SDLC) Two Clocks Missing One Clocks Missing Read Register 2 Read Register 12 D7 D6 D5 D4 D3 D2 D1 D0 D7 D6 D5 D4 D3 D2 D1 D0 V0 TC0 V1 TC1 V2 V3 V4 Interrupt Vector * TC2 TC3 V5 TC4 V6 TC5 V7 * Modified in B Channel Lower Byte of Time 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