SFR Mapping
The Special Function Registers (SFRs) of the AT89C51RB2/RC2 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: IEN0, IPL0, IPH0, IEN1, IPL1, IPH1
Keyboard Interface registers: KBE, KBF, KBLS
SPI registers: SPCON, SPSTR, SPDAT
BRG (Baud Rate Generator) registers: BRL, BDRCON
Flash register: FCON
Clock Prescaler register: CKRL
Others: AUXR, AUXR1, CKCON0, CKCON1
4
AT89C51RB2/RC2
4180E–8051–10/06
ATMEL [ ATMEL CORPORATION ]
