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S87C751-4DB Datasheet(PDF) 11 Page - NXP Semiconductors |
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S87C751-4DB Datasheet(HTML) 11 Page - NXP Semiconductors |
11 / 24 page Philips Semiconductors Product specification 83C751/87C751 80C51 8-bit microcontroller family 2K/64 OTP/ROM, I2C, low pin count 1998 May 01 11 Table 3. 8XC751 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 DPTR: DPH DPL Data pointer (2 bytes) High byte Low byte 83H 82H 00H 00H DF DE DD DC DB DA D9 D8 I2CFG*# I2C configuration D8H/RD SLAVEN MASTRQ 0 TIRUN – – CT1 CT0 0000xx00B WR SLAVEN MASTRQ CLRTI TIRUN – – CT1 CT0 9F 9E 9D 9C 9B 9A 99 98 I2CON*# I2C control 98H/RD RDAT ATN DRDY ARL STR STP MASTER – 81H WR CXA IDLE CDR CARL CSTR CSTP XSTR XSTP I2DAT# I2C data 99H/RD RDAT 0 0 0 0 0 0 0 80H WR XDAT X X X X X X X FF FE FD FC FB FA F9 F8 I2STA*# I2C status F8H – IDLE XDATA XACTV MAKSTR MAKSTP XSTR XSTP x0100000B AF AE AD AC AB AA A9 A8 IE*# Interrupt enable ABH EA – – EI2 ET1 EX1 ET0 EX0 00H 82 81 80 P0*# Port 0 80H – – – – – – SDA SCL xxxxx111B 97 96 95 94 93 92 91 90 P1* Port 1 90H T0 INT1 INT0 – – – – – FFH P3* Port 3 B0H B7 B6 B5 B4 B3 B2 B1 B0 FFH PCON# Power control 87H – – – – – – PD IDL xxxxxx00B D7 D6 D5 D4 D3 D2 D1 D0 PSW* Program status word D0H CY AC F0 RS1 RS0 OV – P 00H SP Stack pointer 81H 07H 8F 8E 8D 8C 8B 8A 89 88 TCON*# Timer/counter control 88H GATE C/T TF TR IE0 IT0 IE1 IT1 00H TL# Timer low byte 8AH 00H TH# Timer high byte 8CH 00H RTL# Timer low reload 8BH 00H RTH# Timer high reload 8DH 00H * SFRs are bit addressable. # SFRs are modified from or added to the 80C51 SFRs. |
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