HD6417320 RENESAS [Renesas Technology Corp], HD6417320 Datasheet - Page 640
HD6417320
Manufacturer Part Number
HD6417320
Description
Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
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Section 17 Realtime Clock (RTC)
Rev. 3.00 Jan. 18, 2008 Page 578 of 1458
REJ09B0033-0300
Bit
3
2
1
0
Bit Name
RTCEN
ADJ
RESET
START
Initial Value
1
0
0
1
R/W
R/W
R/W
R/W
R/W
Description
Crystal Oscillator Control
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.
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 (RTC prescaler and R64CNT) will be
simultaneously reset. This bit always reads 0.
0: Runs normally.
1: 30-second adjustment.
Reset
When 1 is written, initializes the divider circuit
(RTC prescaler and R64CNT). This bit always
reads 0.
0: Runs normally.
1: Divider circuit is reset.
Start Bit
Halts and restarts the counter (clock).
0: Second/minute/hour/day/week/month/year
1: Second/minute/hour/day/week/month/year
Note: The 64-Hz counter always runs unless
counter halts.
counter runs normally.
stopped with the RTCEN bit.
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