H838086R Datasheet, PDF (283/697 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Super Low Power Series

Section 10 Realtime Clock (RTC)
10.3.1 Second Data Register/Free Running Counter Data Register (RSECDR)
RSECDR counts the BCD-coded second value. The setting range is decimal 00 to 59. It is an 8-bit
read register used as a counter, when it operates as a free running counter. For more information
on reading seconds, minutes, hours, and day-of-week, see section 10.4.3, Data Reading Procedure.
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
SC12
—
R/W Counting Ten's Position of Seconds
5
SC11
—
R/W Counts on 0 to 5 for 60-second counting.
4
SC10
—
R/W
3
SC03
—
R/W Counting One's Position of Seconds
2
SC02
—
1
SC01
—
R/W Counts on 0 to 9 once per second. When a carry is
R/W ^{generated, 1 is added to the ten's position.}
0
SC00
—
R/W
10.3.2 Minute Data Register (RMINDR)
RMINDR counts the BCD-coded minute value on the carry generated once per minute by the
RSECDR counting. The setting range is decimal 00 to 59.
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
MN12
—
R/W Counting Ten's Position of Minutes
5
MN11
—
R/W Counts on 0 to 5 for 60-minute counting.
4
MN10
—
R/W
3
MN03
—
R/W Counting One's Position of Minutes
2
MN02
—
1
MN01
—
R/W Counts on 0 to 9 once per minute. When a carry is
R/W ^{generated, 1 is added to the ten's position.}
0
MN00
—
R/W
Rev. 3.00 Aug 23, 2006 Page 205 of 616
REJ09B0182-0300