SH7706 Datasheet, PDF (390/749 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH™ RISC engine Family/SH7700 Series

Section 13 Realtime Clock (RTC)
• Month alarm register (RMONAR)
• RTC control register 1 (RCR1)
• RTC control register 2 (RCR2)
13.3.1 64-Hz Counter (R64CNT)
The 64-Hz counter (R64CNT) is an 8-bit read-only register that indicates the state of the RTC
divider circuit between 64 Hz and 1 Hz.
R64CNT is reset to H'00 by setting the RESET bit in RCR2 or the ADJ bit in RCR2 to 1.
R64CNT is not initialized by a power-on reset or manual reset, or in standby mode.
Bit
7
6 to 0
Bit Name


Initial Value R/W
0
R

R
Description
Always read as 0.
64Hz counter
Each bit (bits 6 to 0) indicates the state of the
RTC divider circuit between 64 and 1Hz.
Bit
Frequency
6:
1Hz
5:
2Hz
4:
4Hz
3:
8Hz
2:
16Hz
1:
32Hz
0:
64Hz
Rev. 5.00 May 29, 2006 page 342 of 698
REJ09B0146-0500