Day Register (Dayr) - Fujitsu F2MC-8FX Hardware Manual

CHAPTER 27 REAL TIME CLOCK
27.3.11

Day Register (DAYR)

The Day Register is used to hold the day information.
Day Register (DAYR)
DAYR ( Real time clock day register)
Address
0FFA
* R/W : Readable and writable, - : Unused, X : Indeterminate
R0/WX : Read 0 and write has no effect on operation
This register holds the updated day value in binary form. During reading the current value in day counter is
read. The most significant 5 bits read as "00000". In order to have proper operation, day value must be
adequately set between 00H (000B or day1) and 1EH (11110B or day31) inclusive. please note that only
the latched value (not the value being continuously updated in the counters) is read from register while
RTCCRL:CL is equal to "1".
504
Figure 27.3-12 Day Register (DAYR)
Bit 7 Bit 6 Bit 5
H
R0/WX R0/WX R0/WX
Bit 4 Bit 3 Bit 2 Bit 1
DAY4 DAY3
DAY2 DAY1
R/W R/W
R/W R/W
Bit 0 Initial value
DAY0 000XXXXX
B
R/W