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P80C851FBB Datasheet(PDF) 6 Page - NXP Semiconductors |
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P80C851FBB Datasheet(HTML) 6 Page - NXP Semiconductors |
6 / 22 page Philips Semiconductors Product specification 80C851/83C851 CMOS single-chip 8-bit microcontroller with on-chip EEPROM 1998 Jul 03 6 Table 1. 8XC851 Special Function Registers SYMBOL DESCRIPTION DIRECT ADDRESS BIT ADDRESS, SYMBOL, OR ALTERNATIVE PORT FUNCTION MSB LSB RESET VALUE ACC* Accumulator E0H E7 E6 E5 E4 E3 E2 E1 E0 00H B* B register F0H F7 F6 F5 F4 F3 F2 F1 F0 00H EF EE ED EC EB EA E9 E8 DPTR: DPH DPL Data pointer (2 bytes): High byte Low byte 83H 82H 00H 00H EADRH# EEPROM addr reg-high F3H 80H EADRL# EEPROM addr reg-low F2H 00H ECNTRL# EEPROM control reg F6H IFE EEINT EWP – ECNTR L3 ECNTR L2 ECNTR L1 ECNTR L0 00H EDAT# EEPROM data register F4H xxH ETIM# EEPROM timer register F5H 08H BF BE BD BC BB BA B9 B8 IP* Interrupt priority B8H – – – PS PT1 PX1 PT0 PX0 xxx00000B AF AE AD AC AB AA A9 A8 IE* Interrupt enable A8H EA – – ES ET1 EX1 ET0 EX0 0xx00000B P0* Port 0 80H 87 86 85 84 83 82 81 80 FFH P1* Port 1 90H 97 96 95 94 93 92 91 90 FFH P2* Port 2 A0H A7 A6 A5 A4 A3 A2 A1 A0 FFH P3* Port 3 B0H B7 B6 B5 B4 B3 B2 B1 B0 FFH PCON Power control 87H SMOD – – – GF1 GF0 PD IDL 0xxx0000B D7 D6 D5 D4 D3 D2 D1 D0 PSW* Program status word D0H CY AC F0 RS1 RS0 OV – P 00H SBUF Serial data buffer 99H xxxxxxxxB 9F 9E 9D 9C 9B 9A 99 98 SCON* Serial port control 98H SM0 SM1 SM2 REN TB8 RB8 TI RI 00H SP Stack pointer 81H 07H 8F 8E 8D 8C 8B 8A 89 88 00H TCON* Timer/counter con- trol 88H TF1 TR1 TF0 TR0 IE1 IT1 IE0 IT0 00H TMOD Timer/counter mode 89H GATE C/T M1 M0 GATE C/T M1 M0 00H TH0 Timer 0 high byte 8CH 00H TH1 Timer 1 high byte 8DH 00H TL0 Timer 0 low byte 8AH 00H TL1 Timer 1 low byte 8BH 00H * SFRs are bit addressable. # SFRs are modified from or added to the 80C51 SFRs. |
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