Instruction Manual

Preliminary W79E8213/W79E8213R Data Sheet
Publication Release Date: July 11, 2008
- 14 - Revision A2
8. SPECIAL FUNCTION REGISTERS
The W79E8213 series uses Special Function Registers (SFRs) to control and monitor peripherals and
their Modes. The SFRs reside in the register locations 80-FFh and are accessed by direct addressing
only. Some of the SFRs are bit addressable. This is very useful in cases where users wish to modify a
particular bit without changing the others. The SFRs that are bit addressable are those whose
addresses end in 0 or 8. The W79E8213 series contain all the SFRs present in the standard 8052.
However some additional SFRs are added. In some cases the unused bits in the original 8052, have
been given new functions. The list of the SFRs is as follows.
F8
IP1 BUZCON
F0
B PADIDS IP1H
E8
EIE
E0
ACC ADCCON ADCH ADCCON1
D8
WDCON PWMPL PWM0L PWM1L PWMCON1 PWM2L PWM3L PWMCON2
D0
PSW PWMPH PWM0H PWM1H PWM2H PWM3H PWMCON3
C8
NVMCON NVMDATA
C0
NVMADDRL TA
B8
IP0
B0
P0M1 P0M2 P1M1 P1M2 P2M1 P2M2 IP0H
A8
IE
A0
P2 AUXR1 EDIC
98
90
P1
88
TCON TMOD TL0 TL1 TH0 TH1 CKCON
80
P0 SP DPL DPH PCON
Table 8-1: Special Function Register Location Table
Note: 1. The SFRs in the column with dark borders are bit-addressable
2. The table is condensed with eight locations per row. Empty locations indicate that these are no registers at these
addresses. When a bit or register is not implemented, it will read high.