Special function registers (sfr’s), Introduction – Rainbow Electronics AT89C5122 User Manual
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AT8xC5122/23
4202E–SCR–06/06
Special Function
Registers (SFR’s)
Introduction
The Special Function Registers (SFRs) of the AT8xC5122/23 can be ranked into the fol-
lowing categories:
•
C51 Core Registers: ACC, B, DPH, DPL, PSW, SP
•
System Configuration Registers: PCON, CKRL, CKCON0, CKCON1, CKSEL,
PLLCON, PLLDIV, AUXR, AUXR1, RCON
•
I/O Port Registers: P0, P1, P2, P3, P4, P5, PMOD1, PMOD2
•
Timer Registers: TCON, TH0, TH1, TMOD, TL0, TL1
•
Watchdog (WD) Registers: WDTRST, WDTPRG
•
Serial I/O Port Registers: SADDR, SADEN, SBUF, SCON
•
Baud Rate Generator (BRG) Registers: BRL, BDRCON
•
System Interrupt Registers: IE0, IPL0, IPH0, IE1, IPL1, IPH1
•
Smart Card Interface (SCI) Registers: SCSR, SCCON/SCETU0, SCISR/SCETU1,
SCIER/SCIIR, SCIBUF, SCGT0/SCWT0, SCGT1/SCWT1, SCICR/SCWT2, SCICLK
•
DC/DC Converter Registers: DCCKPS
•
Keyboard Interface Registers: KBE, KBF, KBLS
•
Serial Port Interface (SPI) Registers: SPCON, SPSTA, SPDAT
•
Universal Serial Bus (USB) Registers:USBCON, USBADDR, USBINT, USBIEN,
UEPNUM, UEPCONX, UEPSTAX, UEPRST, UEPINT, UEPIEN, UEPDATX,
UBYCTX, UFNUML, UFNUMH
•
LED Controller Registers: LEDCON0, LEDCON1