7 I/O PORTS (PPORT)
7-32
Seiko Epson Corporation
S1C31D50/D51 TECHNICAL MANUAL
(Rev. 2.00)
Register name
Bit
Bit name
Initial
Reset
R/W
Remarks
48
pin
64
pin
80
pin
100
pin
P8INTF
(P8 Port Interrupt
Flag Register)
15–8 –
0x00
–
R
–
– – – –
7
P8IF7
0
H0
R/W Cleared by writing 1.
– –
✓
✓
6
P8IF6
0
H0
R/W
– –
✓
✓
5
P8IF5
0
H0
R/W
✓
✓
✓
✓
4
P8IF4
0
H0
R/W
✓
✓
✓
✓
3
P8IF3
0
H0
R/W
✓
✓
✓
✓
2
P8IF2
0
H0
R/W
–
✓
✓
✓
1
P8IF1
0
H0
R/W
–
✓
✓
✓
0
P8IF0
0
H0
R/W
– –
✓
✓
P8INTCTL
(P8 Port Interrupt
Control Register)
15 P8EDGE7
0
H0
R/W –
– –
✓
✓
14 P8EDGE6
0
H0
R/W
– –
✓
✓
13 P8EDGE5
0
H0
R/W
✓
✓
✓
✓
12 P8EDGE4
0
H0
R/W
✓
✓
✓
✓
11 P8EDGE3
0
H0
R/W
✓
✓
✓
✓
10 P8EDGE2
0
H0
R/W
–
✓
✓
✓
9
P8EDGE1
0
H0
R/W
–
✓
✓
✓
8
P8EDGE0
0
H0
R/W
– –
✓
✓
7
P8IE7
0
H0
R/W –
– –
✓
✓
6
P8IE6
0
H0
R/W
– –
✓
✓
5
P8IE5
0
H0
R/W
✓
✓
✓
✓
4
P8IE4
0
H0
R/W
✓
✓
✓
✓
3
P8IE3
0
H0
R/W
✓
✓
✓
✓
2
P8IE2
0
H0
R/W
–
✓
✓
✓
1
P8IE1
0
H0
R/W
–
✓
✓
✓
0
P8IE0
0
H0
R/W
– –
✓
✓
P8CHATEN
(P8 Port Chattering
Filter Enable Register)
15–8 –
0x00
–
R
–
– – – –
7
P8CHATEN7
0
H0
R/W –
– –
✓
✓
6
P8CHATEN6
0
H0
R/W
– –
✓
✓
5
P8CHATEN5
0
H0
R/W
✓
✓
✓
✓
4
P8CHATEN4
0
H0
R/W
✓
✓
✓
✓
3
P8CHATEN3
0
H0
R/W
✓
✓
✓
✓
2
P8CHATEN2
0
H0
R/W
–
✓
✓
✓
1
P8CHATEN1
0
H0
R/W
–
✓
✓
✓
0
P8CHATEN0
0
H0
R/W
– –
✓
✓
P8MODSEL
(P8 Port Mode Select
Register)
15–8 –
0x00
–
R
–
– – – –
7
P8SEL7
0
H0
R/W –
– –
✓
✓
6
P8SEL6
0
H0
R/W
– –
✓
✓
5
P8SEL5
0
H0
R/W
✓
✓
✓
✓
4
P8SEL4
0
H0
R/W
✓
✓
✓
✓
3
P8SEL3
0
H0
R/W
✓
✓
✓
✓
2
P8SEL2
0
H0
R/W
–
✓
✓
✓
1
P8SEL1
0
H0
R/W
–
✓
✓
✓
0
P8SEL0
0
H0
R/W
– –
✓
✓
P8FNCSEL
(P8 Port Function
Select Register)
15–14 P87MUX[1:0]
0x0
H0
R/W –
– –
✓
✓
13–12 P86MUX[1:0]
0x0
H0
R/W
– –
✓
✓
11–10 P85MUX[1:0]
0x0
H0
R/W
✓
✓
✓
✓
9–8 P84MUX[1:0]
0x0
H0
R/W
✓
✓
✓
✓
7–6 P83MUX[1:0]
0x0
H0
R/W
✓
✓
✓
✓
5–4 P82MUX[1:0]
0x0
H0
R/W
–
✓
✓
✓
3–2 P81MUX[1:0]
0x0
H0
R/W
–
✓
✓
✓
1–0 P80MUX[1:0]
0x0
H0
R/W
– –
✓
✓