Rev. 2.00, 09/03, page 367 of 690
Bit
Bit Name
Initial Value
R/W
Description
6
5
4
PES2
PES1
PES0
0
0
0
R/W
R/W
R/W
Periodic Interrupt Interval
These bits specify the periodic interrupt interval.
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.
Содержание SH7705
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