Renesas rl78 User Manual
RL78/G1A
CHAPTER 7 REAL-TIME CLOCK
Table 7-2 shows the relationship between the setting value of the AMPM bit, the hour count register (HOUR) value, and
time.
Table 7-2. Displayed Time Digits
24-Hour Display (AMPM = 1)
12-Hour Display (AMPM = 1)
Time HOUR
Register Time HOUR
Register
0
00H 12
a.m. 12H
1 01H
1
a.m.
01H
2 02H
2
a.m.
02H
3 03H
3
a.m.
03H
4 04H
4
a.m.
04H
5 05H
5
a.m.
05H
6 06H
6
a.m.
06H
7 07H
7
a.m.
07H
8 08H
8
a.m.
08H
9 09H
9
a.m.
09H
10
10H 10
a.m. 10H
11
11H 11
a.m. 11H
12
12H 12
p.m. 32H
13 13H
1
p.m.
21H
14 14H
2
p.m.
22H
15 15H
3
p.m.
23H
16 16H
4
p.m.
24H
17 17H
5
p.m.
25H
18 18H
6
p.m.
26H
19 19H
7
p.m.
27H
20 20H
8
p.m.
28H
21 21H
9
p.m.
29H
22
22H 10
p.m. 30H
23
23H 11
p.m. 31H
The HOUR register value is set to 12-hour display when the AMPM bit is “0” and to 24-hour display when the AMPM bit
is “1”.
In 12-hour display, the fifth bit of the HOUR register displays 0 for AM and 1 for PM.
R01UH0305EJ0200 Rev.2.00
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Jul 04, 2013