M16C65 Datasheet, PDF (458/829 Pages) Renesas Technology Corp – RENESAS MCU M16C FAMILY / M16C/60

Under development
M16C/65 Group
Preliminary Specification
This is a preliminary specification and is subject to change.
20. Real-Time Clock
1s
1s
BSY bit
TSTART bit
in RTCCR1 register
TCSTF bit
in RTCCR1 register
Set to 1 by a program
Start counting
RTCSEC
44
RTCMIN
23
Undefined
45
46
Undefined
RTCHR
1
RTCPM bit
0
Set to 0 by a program
Stop counting
RTCOUT pin output
Low is output when the RTCOUT pin is
used first, e.g., after reset.
When count stops after selecting the
RTCOUT pin, the state before stop is
retained.
Low is output after counting starts.
The state before stop is retained.
The diagram above applies under the following conditions:
yThe TOENA bit in the RTCCR1 register is 1 (compare output enabled).
yBits RTCCMP1 to RTCCMP0 in the RTCCR2 register is 01b (compare 1 mode)
BSY bit : Bit in RTCSEC register
RTCSEC : Bits SC12 to SC10 and SC03 to SC00 in RTCSEC register
RTCMIN : Bits MN12 to MN10 and MN03 to MN00 in RTCMIN register
RTCHR : Bits HR11 to HR10 and HR03 to HR00 in RTCHR register
RTCPM bit : Bit in RTCCR1 register
Figure 20.7 Count Start/Stop Operating Example
REJ09B0484-0030 Rev.0.30 Sep 09, 2008
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