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APPENDIX A LIST OF PERIPHERAL CIRCUIT CONTROL REGISTERS
Address
Register name
0x0020
P4RCTL
0244
(P4 Port Pull-up/down
Control Register)
0x0020
P4INTF
0246
(P4 Port Interrupt
Flag Register)
0x0020
P4INTCTL
0248
(P4 Port Interrupt
Control Register)
0x0020
P4CHATEN
024a
(P4 Port Chattering
Filter Enable Register)
0x0020
P4MODSEL
024c
(P4 Port Mode Select
Register)
AP-A-14
Bit
Bit name
15–14 –
13
P4PDPU5
12
P4PDPU4
11
P4PDPU3
10
P4PDPU2
9
P4PDPU1
8
P4PDPU0
7–6 –
5
P4REN5
4
P4REN4
3
P4REN3
2
P4REN2
1
P4REN1
0
P4REN0
15–8 –
7–6 –
5
P4IF5
4
P4IF4
3
P4IF3
2
P4IF2
1
P4IF1
0
P4IF0
15–14 –
13
P4EDGE5
12
P4EDGE4
11
P4EDGE3
10
P4EDGE2
9
P4EDGE1
8
P4EDGE0
7–6 –
5
P4IE5
4
P4IE4
3
P4IE3
2
P4IE2
1
P4IE1
0
P4IE0
15–8 –
7–6 –
5
P4CHATEN5
4
P4CHATEN4
3
P4CHATEN3
2
P4CHATEN2
1
P4CHATEN1
0
P4CHATEN0
15–8 –
7–6 –
5
P4SEL5
4
P4SEL4
3
P4SEL3
2
P4SEL2
1
P4SEL1
0
P4SEL0
Seiko Epson Corporation
Initial
Reset
R/W
0x0
–
R
0
H0
R/W
0
H0
R/W
0
H0
R/W
0
H0
R/W
0
H0
R/W
0
H0
R/W
0x0
–
R
0
H0
R/W
0
H0
R/W
0
H0
R/W
0
H0
R/W
0
H0
R/W
0
H0
R/W
0x00
–
R
0x0
–
R
0
H0
R/W
0
H0
R/W
0
H0
R/W
0
H0
R/W
0
H0
R/W
0
H0
R/W
0x0
–
R
0
H0
R/W
0
H0
R/W
0
H0
R/W
0
H0
R/W
0
H0
R/W
0
H0
R/W
0x0
–
R
0
H0
R/W
0
H0
R/W
0
H0
R/W
0
H0
R/W
0
H0
R/W
0
H0
R/W
0x00
–
R
0x0
–
R
0
H0
R/W
0
H0
R/W
0
H0
R/W
0
H0
R/W
0
H0
R/W
0
H0
R/W
0x00
–
R
0x0
–
R
0
H0
R/W
0
H0
R/W
0
H0
R/W
0
H0
R/W
0
H0
R/W
0
H0
R/W
S1C31D41 TECHNICAL MANUAL
32
48
Remarks
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pin
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(Rev. 1.1)
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