R5S72611 RENESAS [Renesas Technology Corp], R5S72611 Datasheet - Page 674
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R5S72611
Manufacturer Part Number
R5S72611
Description
32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7260 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.R5S72611.pdf
(1348 pages)
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Section 15 Realtime Clock (RTC)
15.3.1
R64CNT indicates the state of the divider circuit between 64 Hz and 1 Hz.
Reading this register, when carry from 128-Hz divider stage is generated, sets the CF bit in the
RTC control register 1 (RCR1) to 1 so that the carrying and reading 64 Hz counter are performed
at the same time is indicated. In this case, the R64CNT should be read again after writing 0 to the
CF bit in RCR1 since the read value is not valid.
After the RESET bit or ADJ bit in the RTC control register 2 (RCR2) is set to 1, the RTC divider
circuit is initialized and R64CNT is initialized to H'00.
R64CNT is not initialized by a power-on reset or manual reset, or in deep standby and software
standby modes.
Rev. 2.00 Sep. 07, 2007 Page 642 of 1312
REJ09B0320-0200
Register Name
RTC control register 1
RTC control register 2
RTC control register 3
Bit
7
6
5
4
3
2
1
0
Bit Name
1 Hz
2 Hz
4 Hz
8 Hz
16 Hz
32 Hz
64 Hz
64-Hz Counter (R64CNT)
Initial value:
Initial
Value
0
Undefined R
Undefined R
Undefined R
Undefined R
Undefined R
Undefined R
Undefined R
R/W:
Bit:
Abbreviation
RCR1
RCR2
RCR3
—
R
7
0
R/W
R
1Hz
—
R
6
Description
Reserved
This bit is always read as 0. The write value should
Indicate the state of the divider circuit between
64 Hz and 1 Hz.
always be 0.
2Hz
—
R
5
R/W
R/W
R/W
R/W
4Hz
—
R
4
8Hz
—
R
3
Initial Value
H'00
H'09
H'00
16Hz 32Hz 64Hz
—
R
2
—
R
1
—
R
0
Address
H'FFFE081C
H'FFFE081E
H'FFFE0824
Access
Size
8
8
8
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