Epson S1C17M20 Technical Manual page 291

Address Register name
0x4240 P4DAT
(P4 Port Data
Register)
0x4242 P4IOEN
(P4 Port Enable
Register)
0x4244 P4RCTL
(P4 Port Pull-up/down
Control Register)
0x4246 P4INTF
(P4 Port Interrupt
Flag Register)
0x4248 P4INTCTL
(P4 Port Interrupt
Control Register)
0x424a P4CHATEN
(P4 Port Chattering
Filter Enable Register)
0x424c P4MODSEL
(P4 Port Mode Select
Register)
0x424e P4FNCSEL
(P4 Port Function
Select Register)
S1C17M20/M21/M22/M23/M24/M25
TECHNICAL MANUAL (Rev. 1.0)
APPENDIX A LIST OF PERIPHERAL CIRCUIT CONTROL REGISTERS
Bit Bit name
15–11 –
10 P4OUT2
9 P4OUT1
8 P4OUT0
7–3 –
2 P4IN2
1 P4IN1
0 P4IN0
15–11 –
10 P4IEN2
9 P4IEN1
8 P4IEN0
7–3 –
2 P4OEN2
1 P4OEN1
0 P4OEN0
15–11 –
10 P4PDPU2
9 P4PDPU1
8 P4PDPU0
7–3 –
2 P4REN2
1 P4REN1
0 P4REN0
15–8 –
7–3 –
2 P4IF2
1 P4IF1
0 P4IF0
15–11 –
10 P4EDGE2
9 P4EDGE1
8 P4EDGE0
7–3 –
2 P4IE2
1 P4IE1
0 P4IE0
15–8 –
7–3 –
2 P4CHATEN2
1 P4CHATEN1
0 P4CHATEN0
15–8 –
7–3 –
2 P4SEL2
1 P4SEL1
0 P4SEL0
15–8 –
7–6 –
5–4 P42MUX[1:0]
3–2 P41MUX[1:0]
1–0 P40MUX[1:0]
Seiko Epson Corporation
Initial Reset R/W
0x00 – R
0 H0 R/W
0 H0 R/W
0 H0 R/W
0x00 – R
0 H0 R
0 H0 R
0 H0 R
0x00 – R
0 H0 R/W
0 H0 R/W
0 H0 R/W
0x00 – R
0 H0 R/W
0 H0 R/W
0 H0 R/W
0x00 – R
0 H0 R/W
0 H0 R/W
0 H0 R/W
0x00 – R
0 H0 R/W
0 H0 R/W
0 H0 R/W
0x00 – R
0x00 – R
0 H0 R/W
0 H0 R/W
0 H0 R/W
0x00 – R
0 H0 R/W
0 H0 R/W
0 H0 R/W
0x00 – R
0 H0 R/W
0 H0 R/W
0 H0 R/W
0x00 – R
0x00 – R
0 H0 R/W
0 H0 R/W
0 H0 R/W
0x00 – R
0x00 – R
0 H0 R/W
0 H0 R/W
0 H0 R/W
0x00 – R
0x0 – R
0x0 H0 R/W
0x0 H0 R/W
0x0 H0 R/W
M20/M23 M21/ M22/
Remarks
24pin 32pin M24 M25
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Cleared – – –
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by writing
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AP-A-15