HD64F3687GHV Datasheet, PDF (205/566 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 10 Realtime Clock (RTC)
10.3.3 Hour Data Register (RHRDR)
RHRDR counts the BCD-coded hour value on the carry generated once per hour by RMINDR.
The setting range is either decimal 00 to 11 or 00 to 23 by the selection of the 12/24 bit in
RTCCR1.
Initial
Bit
Bit Name Value R/W Description
7
BSY
—
R
RTC Busy
This bit is set to 1 when the RTC is updating (operating)
the values of second, minute, hour, and day-of-week
data registers. When this bit is 0, the values of second,
minute, hour, and day-of-week data registers must be
adopted.
6
—
0
—
Reserved
This bit is always read as 0.
5
HR11
—
R/W Counting Ten's Position of Hours
4
HR10
—
R/W Counts on 0 to 2 for ten's position of hours.
3
HR03
—
R/W Counting One's Position of Hours
2
HR02
—
R/W Counts on 0 to 9 once per hour. When a carry is
1
HR01
—
R/W ^{generated, 1 is added to the ten's position.}
0
HR00
—
R/W
Rev. 3.00 Sep. 10, 2007 Page 171 of 528
REJ09B0216-0300