AT80C51RD2-RLRUM datasheet(6/81 Pages) ATMEL

Part #	AT80C51RD2-RLRUM

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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6

4113D–8051–01/09

AT80C51RD2

4.

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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