Hour Compare Register (Hrcr) - Fujitsu F2MC-8FX Hardware Manual

27.3.4

Hour Compare Register (HRCR)

The Hour Compare Register is used to perform comparison between hour register and
hour counter.
Hour Compare Register (HRCR)
HRCR (Hour compare register)
Address
0FF3
R0/WX : Read 0 and write has no effect on operation
R/W : Readable and writable
-
X
The value of this register is used to compare with the hour counter for detecting alarm condition. In order to
have proper operation, hour compare value must be adequately set between 00H (0 hour) and 17H (23
hour) inclusive.
If set CRTCRL:PS to "1", The read value of HRCR is indeterminate.
Figure 27.3-5 Hour Compare Register (HRCR)
Bit 7 Bit 6 Bit 5
- - -
H
R0/WX R0/WX R0/WX
: Unused
: Indeterminate
Bit 4 Bit 3 Bit 2 Bit 1
HRC4 HRC3 HRC2 HRC1
R/W R/W R/W R/W
CHAPTER 27 REAL TIME CLOCK
Bit 0 Initial value
HRC0 000XXXXX
B
R/W
497