HD6433682 ETC, HD6433682 Datasheet - Page 169

• Manufacturer Part Number: HD6433682
• Description: Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Tiny Series
• Manufacturer: ETC

10.3
The RTC has the following registers.
10.3.1
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.
Bit
7
6
5
4
3
2
1
0
Second data register/free running counter data register (RSECDR)
Minute data register (RMINDR)
Hour data register (RHRDR)
Day-of-week data register (RWKDR)
RTC control register 1 (RTCCR1)
RTC control register 2 (RTCCR2)
Clock source select register (RTCCSR)
Bit Name
BSY
SC12
SC11
SC10
SC03
SC02
SC01
SC00
Register Descriptions
Second Data Register/Free Running Counter Data Register (RSECDR)
Initial
Value
—
—
—
—
—
—
—
—
R/W
R
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Description
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.
Counting ten’s position of seconds:
Counts on 0 to 5 for 60-second counting.
Counting one’s position of seconds:
Counts on 0 to 9 once per second. When a carry is
generated, 1 is added to the ten’s position.
Rev. 3.00, 05/03, page 139 of 472