MC68HC908LJ12 Datasheet, PDF (210/413 Pages) Freescale Semiconductor, Inc – 8-bit microcontroller units

Real Time Clock (RTC)
$0044
$0045
$0046
$0047
$0048
$0049
$004A
$004B
$004C
$004D
$004E
Read:
RTC Status Register
(RTCSR)
Write:
Reset:
Read:
Alarm Minute Register
(ALMR)
Write:
Reset:
Read:
Alarm Hour Register
(ALHR)
Write:
Reset:
Read:
Second Register
(SECR)
Write:
Reset:
Read:
Minute Register
(MINR)
Write:
Reset:
Read:
Hour Register
(HRR)
Write:
Reset:
Read:
Day Register
(DAYR)
Write:
Reset:
Read:
Month Register
(MTHR)
Write:
Reset:
Read:
Year Register
(YRR)
Write:
Reset:
Read:
Day-Of-Week Register
(DOWR)
Write:
Reset:
Chronograph Data ^Read:
Register Write:
(CHRR) _Reset:
ALMF
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
YR7
0
0
0
0
0
CHRF DAYF
0
0
0
AM5
0
0
0
0
0
0
0
SEC5
0
0
0
MIN5
0
0
0
0
0
0
0
0
0
0
0
0
0
0
YR6
YR5
0
0
0
0
0
CHR6
0
CHR5
0
0
= Unimplemented
HRF
0
AM4
0
AH4
0
SEC4
0
MIN4
0
HR4
0
DAY4
0
0
0
YR4
0
0
0
CHR4
0
MINF SECF TB1F TB2F
0
AM3
0
AH3
0
SEC3
0
MIN3
0
HR3
0
DAY3
0
MTH3
0
YR3
0
0
0
CHR3
0
AM2
0
AH2
0
SEC2
0
MIN2
0
HR2
0
DAY2
0
MTH2
0
YR2
0
DOW2
0
CHR2
0
AM1
0
AH1
0
SEC1
0
MIN1
0
HR1
0
DAY1
0
MTH1
0
YR1
0
DOW1
0
CHR1
0
AM0
0
AH0
0
SEC0
0
MIN0
0
HR0
0
DAY0
1
MTH0
1
YR0
0
DOW0
0
CHR0
0
0
0
0
R = Reserved
Figure 12-1. RTC I/O Register Summary
MC68HC908LJ12 — Rev. 2.1
Freescale Semiconductor
Real Time Clock (RTC)
Technical Data
211