Address
Register name
0x0020
WDT2CMP
00a4
(WDT2 Counter Com-
pare Match Register)
0x0020 00c0–0x0020 00d2
Address
Register name
0x0020
RTCACTLL
00c0
(RTCA Control
Register (Low Byte))
0x0020
RTCACTLH
00c1
(RTCA Control
Register (High Byte))
0x0020
RTCAALM1
00c2
(RTCA Second Alarm
Register)
0x0020
RTCAALM2
00c4
(RTCA Hour/Minute
Alarm Register)
0x0020
RTCASWCTL
00c6
(RTCA Stopwatch
Control Register)
0x0020
RTCASEC
00c8
(RTCA Second/1Hz
Register)
0x0020
RTCAHUR
00ca
(RTCA Hour/Minute
Register)
S1C31D50/D51 TECHNICAL MANUAL
(Rev. 2.00)
APPENDIX A LIST OF PERIPHERAL CIRCUIT CONTROL REGISTERS
Bit
Bit name
15–10 –
9–0 CMP[9:0]
Bit
Bit name
7
–
6
RTCBSY
5
RTCHLD
4
RTC24H
3
–
2
RTCADJ
1
RTCRST
0
RTCRUN
7
RTCTRMBSY
6–0 RTCTRM[6:0]
15
–
14–12 RTCSHA[2:0]
11–8 RTCSLA[3:0]
7–0 –
15
–
14
RTCAPA
13–12 RTCHHA[1:0]
11–8 RTCHLA[3:0]
7
–
6–4 RTCMIHA[2:0]
3–0 RTCMILA[3:0]
15–12 BCD10[3:0]
11–8 BCD100[3:0]
7–5 –
4
SWRST
3–1 –
0
SWRUN
15
–
14–12 RTCSH[2:0]
11–8 RTCSL[3:0]
7
RTC1HZ
6
RTC2HZ
5
RTC4HZ
4
RTC8HZ
3
RTC16HZ
2
RTC32HZ
1
RTC64HZ
0
RTC128HZ
15
–
14
RTCAP
13–12 RTCHH[1:0]
11–8 RTCHL[3:0]
7
–
6–4 RTCMIH[2:0]
3–0 RTCMIL[3:0]
Seiko Epson Corporation
Initial
Reset
R/W
0x00
–
R
0x3ff
H0
R/WP
Real-time Clock (RTCA)
Initial
Reset
R/W
0
–
R
0
H0
R
0
H0
R/W
0
H0
R/W
0
–
R
0
H0
R/W
0
H0
R/W
0
H0
R/W
0
H0
R
0x00
H0
W
0
–
R
0x0
H0
R/W
0x0
H0
R/W
0x00
–
R
0
–
R
0
H0
R/W
0x0
H0
R/W
0x0
H0
R/W
0
–
R
0x0
H0
R/W
0x0
H0
R/W
0x0
H0
R
0x0
H0
R
0x0
–
R
0
H0
W
0x0
–
R
0
H0
R/W
0
–
R
0x0
H0
R/W
0x0
H0
R/W
0
H0
R
0
H0
R
0
H0
R
0
H0
R
0
H0
R
0
H0
R
0
H0
R
0
H0
R
0
–
R
0
H0
R/W
0x1
H0
R/W
0x2
H0
R/W
0
–
R
0x0
H0
R/W
0x0
H0
R/W
Remarks
–
Remarks
–
Cleared by setting the
RTCACTLL.RTCRST bit to 1.
–
Cleared by setting the
RTCACTLL.RTCRST bit to 1.
–
–
Read as 0x00.
–
–
–
Read as 0.
–
–
Cleared by setting the
RTCACTLL.RTCRST bit to 1.
–
AP-A-3