AT80C51RD2-3CSUM datasheet(6/83 Pages) ATMEL

Part #	AT80C51RD2-3CSUM

Description	80C51 High Performance ROM 8-bit Microcontroller

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Manufacturer	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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AT80C51RD2/AT83C51Rx2

4113B–8051–03/05

SFR Mapping

The Special Function Registers (SFRs) of the microcontroller fall into the following

categories:

•

C51 core registers: ACC, B, DPH, DPL, PSW, SP

•

I/O port registers: P0, P1, P2, P3

•

Timer registers: T2CON, T2MOD, TCON, TH0, TH1, TH2, TMOD, TL0, TL1, TL2,

RCAP2L, RCAP2H

•

Serial I/O port registers: SADDR, SADEN, SBUF, SCON

•

PCA (Programmable Counter Array) registers: CCON, CCAPMx, CL, CH,

CCAPxH, CCAPxL (x: 0 to 4)

•

Power and clock control registers: PCON

•

Hardware Watchdog Timer registers: WDTRST, WDTPRG

•

Interrupt system registers: IE0, IPL0, IPH0, IE1, IPL1, IPH1

•

Keyboard Interface registers: KBE, KBF, KBLS

•

BRG (Baud Rate Generator) registers: BRL, BDRCON

•

Clock Prescaler register: CKRL

•

Others: AUXR, AUXR1, CKCON0, CKCON1

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