7 I/O PORTS (PPORT)
7-20
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
P3RCTL
(P3 Port Pull-up/down
Control Register)
15 P3PDPU7
0
H0
R/W –
– – –
✓
14 P3PDPU6
0
H0
R/W
– – –
✓
13 P3PDPU5
0
H0
R/W
– –
✓
✓
12 P3PDPU4
0
H0
R/W
–
✓
✓
✓
11 P3PDPU3
0
H0
R/W
–
✓
✓
✓
10 P3PDPU2
0
H0
R/W
✓
✓
✓
✓
9
P3PDPU1
0
H0
R/W
✓
✓
✓
✓
8
P3PDPU0
0
H0
R/W
✓
✓
✓
✓
7
P3REN7
0
H0
R/W –
– – –
✓
6
P3REN6
0
H0
R/W
– – –
✓
5
P3REN5
0
H0
R/W
– –
✓
✓
4
P3REN4
0
H0
R/W
–
✓
✓
✓
3
P3REN3
0
H0
R/W
–
✓
✓
✓
2
P3REN2
0
H0
R/W
✓
✓
✓
✓
1
P3REN1
0
H0
R/W
✓
✓
✓
✓
0
P3REN0
0
H0
R/W
✓
✓
✓
✓
P3INTF
(P3 Port Interrupt
Flag Register)
15–8 –
0x00
–
R
–
– – – –
7
P3IF7
0
H0
R/W Cleared by writing 1.
– – –
✓
6
P3IF6
0
H0
R/W
– – –
✓
5
P3IF5
0
H0
R/W
– –
✓
✓
4
P3IF4
0
H0
R/W
–
✓
✓
✓
3
P3IF3
0
H0
R/W
–
✓
✓
✓
2
P3IF2
0
H0
R/W
✓
✓
✓
✓
1
P3IF1
0
H0
R/W
✓
✓
✓
✓
0
P3IF0
0
H0
R/W
✓
✓
✓
✓
P3INTCTL
(P3 Port Interrupt
Control Register)
15 P3EDGE7
0
H0
R/W –
– – –
✓
14 P3EDGE6
0
H0
R/W
– – –
✓
13 P3EDGE5
0
H0
R/W
– –
✓
✓
12 P3EDGE4
0
H0
R/W
–
✓
✓
✓
11 P3EDGE3
0
H0
R/W
–
✓
✓
✓
10 P3EDGE2
0
H0
R/W
✓
✓
✓
✓
9
P3EDGE1
0
H0
R/W
✓
✓
✓
✓
8
P3EDGE0
0
H0
R/W
✓
✓
✓
✓
7
P3IE7
0
H0
R/W –
– – –
✓
6
P3IE6
0
H0
R/W
– – –
✓
5
P3IE5
0
H0
R/W
– –
✓
✓
4
P3IE4
0
H0
R/W
–
✓
✓
✓
3
P3IE3
0
H0
R/W
–
✓
✓
✓
2
P3IE2
0
H0
R/W
✓
✓
✓
✓
1
P3IE1
0
H0
R/W
✓
✓
✓
✓
0
P3IE0
0
H0
R/W
✓
✓
✓
✓
P3CHATEN
(P3 Port Chattering
Filter Enable Register)
15–8 –
0x00
–
R
–
– – – –
7
P3CHATEN7
0
H0
R/W –
– – –
✓
6
P3CHATEN6
0
H0
R/W
– – –
✓
5
P3CHATEN5
0
H0
R/W
– –
✓
✓
4
P3CHATEN4
0
H0
R/W
–
✓
✓
✓
3
P3CHATEN3
0
H0
R/W
–
✓
✓
✓
2
P3CHATEN2
0
H0
R/W
✓
✓
✓
✓
1
P3CHATEN1
0
H0
R/W
✓
✓
✓
✓
0
P3CHATEN0
0
H0
R/W
✓
✓
✓
✓