HD6417705 Datasheet, PDF (413/739 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7700 Series

Bit
Bit Name Initial Value R/W Description
6
PES2
0
5
PES1
0
4
PES0
0
R/W Periodic Interrupt Interval
R/W _{These bits specify the periodic interrupt interval.}
R/W
000: No periodic interrupts generated
001: Periodic interrupt generated every 1/256
second
010: Periodic interrupt generated every 1/64
second
011: Periodic interrupt generated every 1/16
second
100: Periodic interrupt generated every 1/4
second
101: Periodic interrupt generated every 1/2
second
110: Periodic interrupt generated every 1 second
111: Periodic interrupt generated every 2 seconds
3
RTCEN
1
R/W Controls the operation of the crystal oscillator for
the RTC.
0: Halts the crystal oscillator for the RTC.
1: Runs the crystal oscillator for the RTC.
2
ADJ
0
R/W 30 Second Adjustment
When 1 is written to the ADJ bit, times of 29
seconds or less will be rounded to 00 seconds
and 30 seconds or more to 1 minute. The divider
circuit will be simultaneously reset. This bit is
always read as 0.
0: Runs normally.
1: 30-second adjustment.
1
RESET
0
R/W Reset
When 1 is written, initializes the divider circuit
(RTC prescaler and R64CNT). This bit is always
read as 0.
0: Runs normally.
1: Divider circuit is reset.
Rev. 2.00, 09/03, page 367 of 690