Datasheet

Real Time Clock (RTC)
Data Sheet MC68HC908LJ24/LK24 — Rev. 2.1
220 Real Time Clock (RTC) Freescale Semiconductor
$0046
Alarm Hour Register
(ALHR)
Read: 0 0 0
AH4 AH3 AH2 AH1 AH0
Write:
Reset:0 0 0UUUUU
$0047
Second Register
(SECR)
Read: 0 0
SEC5 SEC4 SEC3 SEC2 SEC1 SEC0
Write:
Reset:0 0UUUUUU
$0048
Minute Register
(MINR)
Read: 0 0
MIN5 MIN4 MIN3 MIN2 MIN1 MIN0
Write:
Reset:0 0UUUUUU
$0049
Hour Register
(HRR)
Read: 0 0 0
HR4 HR3 HR2 HR1 HR0
Write:
Reset:0 0 0UUUUU
$004A
Day Register
(DAYR)
Read: 0 0 0
DAY4 DAY3 DAY2 DAY1 DAY0
Write:
Reset:0 0 0UUUUU
$004B
Month Register
(MTHR)
Read: 0000
MTH3 MTH2 MTH1 MTH0
Write:
Reset:0000UUUU
$004C
Year Register
(YRR)
Read:
YR7 YR6 YR5 YR4 YR3 YR2 YR1 YR0
Write:
Reset:UUUUUUUU
$004D
Day-Of-Week Register
(DOWR)
Read: 00000
DOW2 DOW1 DOW0
Write:
Reset:00000UUU
$004E
Chronograph Data
Register
(CHRR)
Read: 0 CHR6 CHR5 CHR4 CHR3 CHR2 CHR1 CHR0
Write:
Reset:00000000
U = Unaffected
= Unimplemented R = Reserved
Figure 12-1. RTC I/O Register Summary