APPENDIX A LIST OF PERIPHERAL CIRCUIT CONTROL REGISTERS
S1C17M20/M21/M22/M23/M24/M25
Seiko Epson Corporation
AP-A-5
TECHNICAL MANUAL (Rev. 1.0)
Address
Register name
Bit
Bit name
Initial
Reset
R/W
Remarks
0x40c8 RTCSEC
(RTC Second/1Hz
Register)
15 –
0
–
R
–
14–12 RTCSH[2:0]
0x0
H0
R/W
11–8 RTCSL[3:0]
0x0
H0
R/W
7
RTC1HZ
0
H0
R
Cleared by setting the
RTCCTL.RTCRST bit to 1.
6
RTC2HZ
0
H0
R
5
RTC4HZ
0
H0
R
4
RTC8HZ
0
H0
R
3
RTC16HZ
0
H0
R
2
RTC32HZ
0
H0
R
1
RTC64HZ
0
H0
R
0
RTC128HZ
0
H0
R
0x40ca RTCHUR
(RTC Hour/Minute
Register)
15 –
0
–
R
–
14 RTCAP
0
H0
R/W
13–12 RTCHH[1:0]
0x1
H0
R/W
11–8 RTCHL[3:0]
0x2
H0
R/W
7
–
0
–
R
6–4 RTCMIH[2:0]
0x0
H0
R/W
3–0 RTCMIL[3:0]
0x0
H0
R/W
0x40cc RTCMON
(RTC Month/Day
Register)
15–13 –
0x0
–
R
–
12 RTCMOH
0
H0
R/W
11–8 RTCMOL[3:0]
0x1
H0
R/W
7–6 –
0x0
–
R
5–4 RTCDH[1:0]
0x0
H0
R/W
3–0 RTCDL[3:0]
0x1
H0
R/W
0x40ce RTCYAR
(RTC Year/Week
Register)
15–11 –
0x00
–
R
–
10–8 RTCWK[2:0]
0x0
H0
R/W
7–4 RTCYH[3:0]
0x0
H0
R/W
3–0 RTCYL[3:0]
0x0
H0
R/W
0x40d0 RTCINTF
(RTC Interrupt Flag
Register)
15 RTCTRMIF
0
H0
R/W Cleared by writing 1.
14 SW1IF
0
H0
R/W
13 SW10IF
0
H0
R/W
12 SW100IF
0
H0
R/W
11–9 –
0x0
–
R
–
8
ALARMIF
0
H0
R/W Cleared by writing 1.
7
1DAYIF
0
H0
R/W
6
1HURIF
0
H0
R/W
5
1MINIF
0
H0
R/W
4
1SECIF
0
H0
R/W
3
1_2SECIF
0
H0
R/W
2
1_4SECIF
0
H0
R/W
1
1_8SECIF
0
H0
R/W
0
1_32SECIF
0
H0
R/W
0x40d2 RTCINTE
(RTC Interrupt Enable
Register)
15 RTCTRMIE
0
H0
R/W –
14 SW1IE
0
H0
R/W
13 SW10IE
0
H0
R/W
12 SW100IE
0
H0
R/W
11–9 –
0x0
–
R
8
ALARMIE
0
H0
R/W
7
1DAYIE
0
H0
R/W
6
1HURIE
0
H0
R/W
5
1MINIE
0
H0
R/W
4
1SECIE
0
H0
R/W
3
1_2SECIE
0
H0
R/W
2
1_4SECIE
0
H0
R/W
1
1_8SECIE
0
H0
R/W
0
1_32SECIE
0
H0
R/W