DS80C320-MCG Datasheet, PDF (59/175 Pages) Dallas Semiconductor – High-Speed Microcontroller User Guide

Real Time Clock Hour Register (RTCH)
7
6
5
4
SFR FDh DOW2 DOW1 DOW0 RTCH.4
R*W*-* R*W*-* R*W*-* R*W*-*
High-Speed Microcontroller User’s Guide
3
RTCH.3
R*W*-*
2
RTCH.2
R*W*-*
1
RTCH.1
R*W*-*
0
RTCH.0
R*W*-*
R=Unrestricted Read, W=Unrestricted Write, -n=Value after Reset, *=See Description
DOW.2-0
Bits 7-5
RTCH.4-0
Bits 4-0
Real Time Clock Day of the Week. These bits represent the current day of the
week. This register can be read only when the RTCRE bit is set, and can only be
modified when the RTCWE bit is set. Consult the description of the RTCWE bit
for the programming protocol for this register. This register counts from 1h to
7h, and increments when the hour value of the RTC (RTCH.4-0) rolls over from
17h to 0h. Writing a 0h to these bits will disable the day of week function and
the count will remain 0. No alarm corresponds to these bits.
Real Time Clock Hours. These bits represent the hour value of the RTC. This
register can be read only when the RTCRE bit is set, and can only be modified
when the RTCWE bit is set. Consult the description of the RTCWE bit for the
programming protocol for this register. This register counts from 0h to 17h (0 to
23 hours), and any writes outside of that range will generate an inaccurate count.
Real Time Clock Day Register 0 (RTCD0)
7
6
5
4
SFR FEh RTCD0.7 RTCD0.6 RTCD0.5 RTCD0.4
R*W*-* R*W*-* R*W*-* R*W*-*
3
RTCD0.3
R*W*-*
2
RTCD0.2
R*W*-*
1
RTCD0.1
R*W*-*
0
RTCD0.0
R*W*-*
R=Unrestricted Read, W=Unrestricted Write, -n=Value after Reset, *=See Description
RTCD0.7-0
Bits 7-0
Real Time Clock Day Register 0. This register contains the least significant
byte of the 16-bit current day count. This is not an absolute value tied to a
specific calendar date, but rather a relative day count defined by the user. This
register can be read only when the RTCRE bit is set, and can only be modified
when the RTCWE bit is set. Consult the description of the RTCWE bit for the
programming protocol for this register. The register counts from 0h to FFh. No
alarm corresponds to these bits.
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