APPENDIX A LIST OF PERIPHERAL CIRCUIT CONTROL REGISTERS
S1C31D50/D51 TECHNICAL MANUAL
Seiko Epson Corporation
AP-A-21
(Rev. 2.00)
Address
Register name
Bit
Bit name
Initial
Reset
R/W
Remarks
48
pin
64
pin
80
pin
100
pin
0x0020
027c
P7MODSEL
(P7 Port Mode Select
Register)
15–8 –
0x00
–
R
–
– – – –
7
P7SEL7
0
H0
R/W –
– – –
✓
6
P7SEL6
0
H0
R/W
– – –
✓
5
P7SEL5
0
H0
R/W
– – –
✓
4
P7SEL4
0
H0
R/W
– –
✓
✓
3
P7SEL3
0
H0
R/W
✓
✓
✓
✓
2
P7SEL2
0
H0
R/W
✓
✓
✓
✓
1
P7SEL1
0
H0
R/W
–
✓
✓
✓
0
P7SEL0
0
H0
R/W
–
✓
✓
✓
0x0020
027e
P7FNCSEL
(P7 Port Function
Select Register)
15–14 P77MUX[1:0]
0x0
H0
R/W –
– – –
✓
13–12 P76MUX[1:0]
0x0
H0
R/W
– – –
✓
11–10 P75MUX[1:0]
0x0
H0
R/W
– – –
✓
9–8 P74MUX[1:0]
0x0
H0
R/W
– –
✓
✓
7–6 P73MUX[1:0]
0x0
H0
R/W
✓
✓
✓
✓
5–4 P72MUX[1:0]
0x0
H0
R/W
✓
✓
✓
✓
3–2 P71MUX[1:0]
0x0
H0
R/W
–
✓
✓
✓
1–0 P70MUX[1:0]
0x0
H0
R/W
–
✓
✓
✓
0x0020
0280
P8DAT
(P8 Port Data
Register)
15 P8OUT7
0
H0
R/W –
– –
✓
✓
14 P8OUT6
0
H0
R/W
– –
✓
✓
13 P8OUT5
0
H0
R/W
✓
✓
✓
✓
12 P8OUT4
0
H0
R/W
✓
✓
✓
✓
11 P8OUT3
0
H0
R/W
✓
✓
✓
✓
10 P8OUT2
0
H0
R/W
–
✓
✓
✓
9
P8OUT1
0
H0
R/W
–
✓
✓
✓
8
P8OUT0
0
H0
R/W
– –
✓
✓
7
P8IN7
0
H0
R
–
– –
✓
✓
6
P8IN6
0
H0
R
– –
✓
✓
5
P8IN5
0
H0
R
✓
✓
✓
✓
4
P8IN4
0
H0
R
✓
✓
✓
✓
3
P8IN3
0
H0
R
✓
✓
✓
✓
2
P8IN2
0
H0
R
–
✓
✓
✓
1
P8IN1
0
H0
R
–
✓
✓
✓
0
P8IN0
0
H0
R
– –
✓
✓
0x0020
0282
P8IOEN
(P8 Port Enable
Register)
15 P8IEN7
0
H0
R/W –
– –
✓
✓
14 P8IEN6
0
H0
R/W
– –
✓
✓
13 P8IEN5
0
H0
R/W
✓
✓
✓
✓
12 P8IEN4
0
H0
R/W
✓
✓
✓
✓
11 P8IEN3
0
H0
R/W
✓
✓
✓
✓
10 P8IEN2
0
H0
R/W
–
✓
✓
✓
9
P8IEN1
0
H0
R/W
–
✓
✓
✓
8
P8IEN0
0
H0
R/W
– –
✓
✓
7
P8OEN7
0
H0
R/W –
– –
✓
✓
6
P8OEN6
0
H0
R/W
– –
✓
✓
5
P8OEN5
0
H0
R/W
✓
✓
✓
✓
4
P8OEN4
0
H0
R/W
✓
✓
✓
✓
3
P8OEN3
0
H0
R/W
✓
✓
✓
✓
2
P8OEN2
0
H0
R/W
–
✓
✓
✓
1
P8OEN1
0
H0
R/W
–
✓
✓
✓
0
P8OEN0
0
H0
R/W
– –
✓
✓