W925EP01 Datasheet, PDF (14/108 Pages) Winbond – 8-BIT CID MICROCONTROLLER

W925EP01/ W925EP01FG
6.2 Special Function Registers
The W925EP01 uses Special Function Registers (SFRs) to control and monitor peripherals and their
Modes.
The SFRs reside in the register locations 80-FFh and accessed by direct addressing only. Some of
the SFRs are bit addressable. This is very useful in cases where one wishes 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 list of SFRs is as follows. The table is condensed with eight locations per row. Empty
locations indicate that there are no registers at these addresses. The content of reserved bits or
registers is not guaranteed.
Table 1 Special Function Register Location Table
F8 EIP
CIDGD CIDGA
FF
F0 B
F7
E8 EIE
TA
CHPCO
N
EF
E0 ACC
SFRAL SFRAH SFRFD SFRCN E7
D8 WDCON
DF
D0 PSW
D7
C8 DIVC
BGCON BG
CF
C0 SCON1 SBUF1 REGVC
PMR
STATUS FSKTC FSKTB C7
B8 IP
DTMFG COMPR IRC1
IRC2
CASPT CASAT BF
B0 P3
CIDR
CIDFG CIDPCR FSKDR DTMFDR DTMFPT DTMFAT B7
A8 IE
P6H
P7H
P7IO
P6IO
P4IO
P5IO AF
A0 P2
HB
P4H
P5H
P7
P6
P4
P5
A7
98 SCON SBUF
P1EF
P1H
P2H
P3H
9F
90 P1
EXIF
RPAGE P1SR P0IO
P1IO
P2IO
P3IO 97
88 TCON TMOD TL0
TL1
TH0
TH1
CKCON1 CKCON2 8F
80 P0
SP
DPL
DPH
DPL1 DPH1 DPS
PCON 87
Note: The SFRs in the column with dark borders are bit-addressable.
A brief description of the SFRs now follows.
PORT 0
(initial=FFH)
Bit:
7
6
5
4
3
2
1
0
P0.7 P0.6 P0.5 P0.4 P0.3 P0.2 P0.1 P0.0
Mnemonic: P0
Address: 80h
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