MC68HC908LJ24 Datasheet, PDF (241/464 Pages) Motorola, Inc – Microcontrollers

Freescale Semiconductor, Inc.
Real Time Clock (RTC)
RTC Registers
12.10.7 Second Register (SECR)
This read/write register contains the current value of the second counter.
This register can be read at any time without affecting the counter count.
Writing to this register loads the value to the second counter and the
counter continues to count from this new value.
The second counter rolls over to 0 ($00) after reaching 59 ($4B). Writing
a value other than 0 to 59 to this register has no effect.
Address: $0047
Read: 0
Write:
0
SEC5 SEC4 SEC3 SEC2 SEC1
Reset: 0
0
U
U
U
U
U
= Unimplemented
This register is write-protected; unprotect by a write sequence to RTCWE[1:0] in RTCCOMR.
Figure 12-13. Second Register (SECR)
SEC0
U
12.10.8 Minute Register (MINR)
This read/write register contains the current value of the minute counter.
This register can be read at any time without affecting the counter count.
Writing to this register loads the value to the minute counter and the
counter continues to count from this new value.
The minute counter rolls over to 0 ($00) after reaching 59 ($4B). Writing
a value other than 0 to 59 to this register has no effect.
Address: $0048
Read: 0
Write:
0
MIN5 MIN4 MIN3 MIN2 MIN1 MIN0
Reset: 0
0
U
U
U
U
U
U
= Unimplemented
This register is write-protected; unprotect by a write sequence to RTCWE[1:0] in RTCCOMR.
Figure 12-14. Minute Register (MINR)
MC68HC908LJ24/LK24 — Rev. 2
MOTOROLA
Real Time Clock (RTC)
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Data Sheet
241