HD64F38602R Datasheet, PDF (223/552 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer

Section 11 Realtime Clock (RTC)
11.3.5 RTC Control Register 1 (RTCCR1)
RTCCR1 controls start/stop and reset of the clock timer. For the definition of time expression, see
figure 11.2.
Initial
Bit
Bit Name Value R/W Description
7
RUN
—/(0)* R/W RTC Operation Start
0: Stops RTC operation
1: Starts RTC operation
6
12/24
—/(0)* R/W Operating Mode
0: RTC operates in 12-hour mode. RHRDR counts on 0
to 11.
1: RTC operates in 24-hour mode. RHRDR counts on 0
to 23.
5
PM
—/(0)* R/W A.M./P.M.
0: Indicates a.m. when RTC is in the 12-hour mode.
1: Indicates p.m. when RTC is in the 12-hour mode.
4
RST
0
R/W Reset
0: Normal operation
1: Resets registers and control circuits except RTCCSR
and this bit. Clear this bit to 0 after having been set to
1.
3
INT
—/(0)* R/W Interrupt Occurrence Timing
0: Periodic interrupts of second, minute, hour, and day-of-
week occur during the RTC busy period.
1: Periodic interrupts of second, minute, hour, and day-of-
week occur immediately after the RTC busy period
finishes.
2 to 0 —
All 0
—
Reserved
These bits are always read as 0.
Note: * Initial value after a reset caused by the RST bit in RTCCR1.
Noon
24-hour count 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
12-hour count 0 1 2 3 4 5 6 7 8 9 10 11 0 1 2 3 4 5
PM
0 (Morning)
1 (Afternoon)
24-hour count 18 19 20 21 22 23 0
12-hour count 6 7 8 9 10 11 0
PM
1 (Afternoon) 0
Figure 11.2 Definition of Time Expression
Rev. 3.00 May 15, 2007 Page 191 of 518
REJ09B0152-0300