HD6417706 RENESAS [Renesas Technology Corp], HD6417706 Datasheet - Page 380

• Manufacturer Part Number: HD6417706
• Description: Renesas 32-Bit RISC Microcomputer Super RISC engine Family/SH7700 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

13.3.11 Hour Alarm Register (RHRAR)
The hour alarm register (RHRAR) is an 8-bit read/write register, and an alarm register
corresponding to the BCD-coded hour section counter RHRCNT of the RTC. When the ENB bit is
set to 1, a comparison with the RHRCNT value is performed. From among the
RSECAR/RMINAR/RHRAR/RWKAR/RDAYAR/RMONAR registers, the counter and alarm
register comparison is performed only on those with ENB bits set to 1, and if each of those
coincide, an RTC alarm interrupt is generated.
The range of hour can be set is 00 to 23 (decimal). Errant operation will result if any other value is
set.
The ENB bit in RHRAR is initialized by a power-on reset. The remaining RHRAR fields are not
initialized by a power-on reset or manual reset, or in standby mode.
Rev. 4.00, 03/04, page 334 of 660
Bit
7
6
5, 4
3 to 0
Bit Name
ENB
Initial Value R/W Description
0
0
R/W Hour Alarm Enable
R
R/W Setting value for 10-unit of hour alarm in the BCD-code.
R/W Setting value for 1-unit of hour alarm in the BCD-code.
0: No compared
1: Compared
Always read as 0.
The range can be set from 0 to 2 (decimal).
The range can be set from 0 to 9 (decimal).