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T89C51AC2 Datasheet(PDF) 10 Page - ATMEL Corporation |
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T89C51AC2 Datasheet(HTML) 10 Page - ATMEL Corporation |
10 / 117 page 10 T89C51AC2 4127D–8051–02/03 SFR Mapping The Special Function Registers (SFRs) of the T89C51AC2 fall into the following categories: Table 3. C51 Core SFRs Mnemonic Add Name 7 6543 210 ACC E0h Accumulator ––– ––– –– B F0h B Register ––– ––– –– PSW D0h Program Status Word CY AC F0 RS1 RS0 OV F1 P SP 81h Stack Pointer ––– ––– –– DPL 82h Data Pointer Low byte LSB of DPTR ––– ––– –– DPH 83h Data Pointer High byte MSB of DPTR ––– ––– –– Table 4. I/O Port SFRs Mnemonic Add Name 7 6543 210 P0 80h Port 0 ––– ––– –– P1 90h Port 1 ––– ––– –– P2 A0h Port 2 ––– ––– –– P3 B0h Port 3 ––– ––– –– P4 C0h Port 4 (x2) ––– ––– –– Table 5. Timers SFRs Mnemonic Add Name 7 6543 210 TH0 8Ch Timer/Counter 0 High byte ––– ––– –– TL0 8Ah Timer/Counter 0 Low byte ––– ––– –– TH1 8Dh Timer/Counter 1 High byte ––– ––– –– TL1 8Bh Timer/Counter 1 Low byte ––– ––– –– TH2 CDh Timer/Counter 2 High byte ––– ––– –– TL2 CCh Timer/Counter 2 Low byte ––– ––– –– TCON 88h Timer/Counter 0 and 1 control TF1 TR1 TF0 TR0 IE1 IT1 IE0 IT0 TMOD 89h Timer/Counter 0 and 1 Modes GATE1 C/T1# M11 M01 GATE0 C/T0# M10 M00 |
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