Epson S1C17F13 Technical Manual page 145

14 REAL-TIME CLOCK (RTC)
Binary mode
BCD mode
Minute counter
This 7-bit counter counts from 0 to 59 minutes with 1 carried over from the second counter. The counter is
cleared to 0 when it reaches 60 minutes and outputs a carry over of 1 to the hour counter. The counter data can
be read/written using the RTCMIN.RTCMIN[6:0] bits.
Binary mode
BCD mode
Hour counter
This 6-bit counter counts from 0 to 23 o'clock (24H mode, RTCCTL.RTC24H bit = 0) or from 1 to 12 (12H
mode, RTCCTL.RTC24H bit = 1) with 1 carried over from the minute counter. The counter data can be read/
written using the RTCHUR.RTCHUR[5:0] bits.
Binary mode
RTCHUR[5:4]
0–2 (10-hour digit)
BCD mode
Time RTCHUR[5:0]
(binary)
0 o'clock (12am)
1 o'clock (1am)
2 o'clock (2am)
3 o'clock (3am)
4 o'clock (4am)
5 o'clock (5am)
6 o'clock (6am)
7 o'clock (7am)
8 o'clock (8am)
9 o'clock (9am)
10 o'clock (10am)
11 o'clock (11am)
12 o'clock (12pm)
13 o'clock (1pm)
14 o'clock (2pm)
15 o'clock (3pm)
16 o'clock (4pm)
17 o'clock (5pm)
18 o'clock (6pm)
19 o'clock (7pm)
20 o'clock (8pm)
21 o'clock (9pm)
22 o'clock (10pm)
23 o'clock (11pm)
14-2
RTCSEC[6:4]
0–5 (10-second digit)
Figure 14.
RTCMIN[6:4]
0–5 (10-minute digit)
Figure 14.
24H mode
RTCHUR[5:0]
0–23
RTCHUR[3:0]
0–9 (1-hour digit)
Figure 14.
Table 14. 3.1 Hour Counter Values
24H mode
RTCHUR[5:0]
(BCD)
0x0 0x00
0x1 0x01
0x2 0x02
0x3 0x03
0x4 0x04
0x5 0x05
0x6 0x06
0x7 0x07
0x8 0x08
0x9 0x09
0xa 0x10
0xb 0x11
0xc 0x12
0xd 0x13
0xe 0x14
0xf 0x15
0x10 0x16
0x11 0x17
0x12 0x18
0x13 0x19
0x14 0x20
0x15 0x21
0x16 0x22
0x17 0x23
Seiko epson Corporation
RTCSEC[6:0]
0–59
RTCSEC[3:0]
0–9 (1-second digit)
3.1 Second Counter
RTCMIN[6:0]
0–59
RTCMIN[3:0]
0–9 (1-minute digit)
3.2 Minute Counter
RTCHUR[5:0]
RTCHUR[5:4]
0–1 (10-hour digit)
3.3 Hour Counter
RTCHUR[5:0]
(binary)
0xc
0x1
0x2
0x3
0x4
0x5
0x6
0x7
0x8
0x9
0xa
0xb
0xc
0x1
0x2
0x3
0x4
0x5
0x6
0x7
0x8
0x9
0xa
0xb
12H mode
1–12
RTCHUR[3:0]
0–9 (1-hour digit)
0 (AM)/1 (PM)
12H mode
RTCHUR[5:0]
AMPM
(BCD)
0x12
0x01
0x02
0x03
0x04
0x05
0x06
0x07
0x08
0x09
0x10
0x11
0x12
0x01
0x02
0x03
0x04
0x05
0x06
0x07
0x08
0x09
0x10
0x11
S1C17F13 TeChniCal Manual
AMPM
0/1
AMPM
0/1
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
(Rev. 1.0)