Rainbow Electronics AT89C5131 - Manual (Page 12)

12
AT89C5131
4136A–USB–03/03
SFR Mapping
The Special Function Registers (SFRs) of the AT89C5131 fall into the following
categories:
• C51 core registers: ACC, B, DPH, DPL, PSW, SP
• I/O port registers: P0, P1, P2, P3, P4
• 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, CMOD, 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
• LED register: LEDCON
• Serial Port Interface (SPI) registers: SPCON, SPSTA, SPDAT
• USB registers: Uxxx (17 registers)
• PLL registers: PLLCON, PLLDIV0
• BRG (Baud Rate Generator) registers: BRL, BDRCON
• Flash register: FCON (FCON access is reserved for the Flash API and ISP
software)
• EEPROM register: EECON
• Clock Prescaler register: CKRL
• 32 kHz Sub Clock Oscillator registers: CKSEL
• Others: AUXR, AUXR1, CKCON0, CKCON1