tmp89fm42a TOSHIBA Semiconductor CORPORATION, tmp89fm42a Datasheet - Page 238

• Manufacturer Part Number: tmp89fm42a
• Description: 8 Bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

RA000
15.4
15.4.1
15.4.2
Real Time Clock Operation
RTCCR<RTCSEL> when RTCCR<RTCRUN> is "1", the existing data remains effective.
be rewritten at the same time as disabling the real time clock operation.
"1".
frequency clock.
request (INTRTC) is generated and the counter continues counting.
stops counting of the low-frequency clock.
RTCCR<RTCSEL> can be rewritten only when RTCCR<RTCRUN> is "0". If data is written into
RTCCR<RTCSEL> can be rewritten at the same time as enabling the real time clock operation, but it cannot
Set the interrupt generation interval to RTCCR<RTCSEL>, and at the same time, set RTCCR<RTCRUN> to
When RTCCR<RTCRUN> is set to "1", the binary counter for the real time clock starts counting of the low-
When the interrupt generation interval selected at RTCCR<RTCSEL> is reached, a real time clock interrupt
Clear RTCCR<RTCRUN> to "0".
When RTCCR<RTCRUN> is cleared to "0", the binary counter for the real time clock is cleared to "0" and
Enabling the real time clock operation
Disabling the real time clock operation
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TMP89FM42A