M16C65 Datasheet, PDF (443/829 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.
20.2.3 Real-Time Clock Hour Data Register (RTCHR)
20. Real-Time Clock
Real-Time Clock Hour Data Register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
RTCHR
Address
0342h
Bit Symbol
Bit Name
HR00
Function
After Reset
XX00 0000b
Setting
Range
RW
RW
HR01
Count 0 to 9 every hour.
RW
1st digit of hour count bit
When the digit moves up, 1
is added to the 2nd digit of
0 to 9
HR02
hour.
RW
HR03
RW
HR10
Count 0 to 1 when the
H12H24 bit is set to 0 (12-
RW
2nd digit of hour count bit
hour mode).
Count 0 to 2 when the
0 to 2
HR11
H12H24 bit is set to
RW
1 (24-hour mode).
—
(b6)
No register bit. If necessary, set to 0. Read as undefined value
—
—
(b7)
Reserved bit
Read as undefined value
RO
HR03-HR00 (1st Digit of Hour Count Bit) (b3-b0)
HR11-HR10 (2nd Digit of Hour Count Bit) (b5-b4)
When the H12H24 bit in the RTCCR1 register is 0 (12-hour mode), set a value between 00 and 11 by
BCD code. When the H12H24 bit in the RTCCR1 register is 1 (24-hour mode), set a value between 00
and 23 by the BCD codes.
These bits become 00 at compare match in compare 2 mode and compare 3 mode.
Write to bits HR11 to HR10 and HR03 to HR00 in the RTCHR register when both bits TSTART and
TCSTF in the RTCCR1 register are 0 (timer stops). Read when the BSY bit in the RTCSEC register is 0
(not while data is updated).
REJ09B0484-0030 Rev.0.30 Sep 09, 2008
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