Epson S1C31D50 Technical Manual page 100

7 I/O PORTS (PPORT)
Register name Bit
P4IOEN 15
(P4 Port Enable
14
Register)
13
12
11
10
9
8
7
6
5
4
3
2
1
0
P4RCTL 15
(P4 Port Pull-up/down
14
Control Register)
13
12
11
10
9
8
7
6
5
4
3
2
1
0
P4INTF 15–8 –
(P4 Port Interrupt
7
Flag Register)
6
5
4
3
2
1
0
P4INTCTL 15
(P4 Port Interrupt
14
Control Register)
13
12
11
10
9
8
7
6
5
4
3
2
1
0
7-22
Bit name Initial
P4IEN7 0
P4IEN6 0
P4IEN5 0
P4IEN4 0
P4IEN3 0
P4IEN2 0
P4IEN1 0
P4IEN0 0
P4OEN7 0
P4OEN6 0
P4OEN5 0
P4OEN4 0
P4OEN3 0
P4OEN2 0
P4OEN1 0
P4OEN0 0
P4PDPU7 0
P4PDPU6 0
P4PDPU5 0
P4PDPU4 0
P4PDPU3 0
P4PDPU2 0
P4PDPU1 0
P4PDPU0 0
P4REN7 0
P4REN6 0
P4REN5 0
P4REN4 0
P4REN3 0
P4REN2 0
P4REN1 0
P4REN0 0
0x00
P4IF7 0
P4IF6 0
P4IF5 0
P4IF4 0
P4IF3 0
P4IF2 0
P4IF1 0
P4IF0 0
P4EDGE7 0
P4EDGE6 0
P4EDGE5 0
P4EDGE4 0
P4EDGE3 0
P4EDGE2 0
P4EDGE1 0
P4EDGE0 0
P4IE7 0
P4IE6 0
P4IE5 0
P4IE4 0
P4IE3 0
P4IE2 0
P4IE1 0
P4IE0 0
Seiko Epson Corporation
Reset R/W Remarks
H0 R/W –
H0 R/W
H0 R/W
H0 R/W
H0 R/W
H0 R/W
H0 R/W
H0 R/W
H0 R/W –
H0 R/W
H0 R/W
H0 R/W
H0 R/W
H0 R/W
H0 R/W
H0 R/W
H0 R/W –
H0 R/W
H0 R/W
H0 R/W
H0 R/W
H0 R/W
H0 R/W
H0 R/W
H0 R/W –
H0 R/W
H0 R/W
H0 R/W
H0 R/W
H0 R/W
H0 R/W
H0 R/W
– R –
H0 R/W Cleared by writing 1.
H0 R/W
H0 R/W
H0 R/W
H0 R/W
H0 R/W
H0 R/W
H0 R/W
H0 R/W –
H0 R/W
H0 R/W
H0 R/W
H0 R/W
H0 R/W
H0 R/W
H0 R/W
H0 R/W –
H0 R/W
H0 R/W
H0 R/W
H0 R/W
H0 R/W
H0 R/W
H0 R/W
S1C31D50/D51 TECHNICAL MANUAL
48 64 80 100
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(Rev. 2.00)