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Section 14 Realtime Clock
Page 676 of 2108 R01UH0134EJ0400 Rev. 4.00
Sep 24, 2014
SH7262 Group, SH7264 Group
Figure 14.1 shows the block diagram.
RHRCNT
RMINCNT
Interrupt
control circuit
RDAYCNT
RYRCNT
RMONCNT
Crystal
oscillator
RTC_X1
RTC_X2
RWKCNT
RHRAR
RMINAR
RDAYAR
RWKAR
Prescaler
32.768 kHz
128 Hz
ARM
PRD
CUP
RCR2
RCR3
RCR1
RFRH
RFRL
RCR5
Operation
control circuit
R64CNT
RSECCNT
RSECAR
Interrupt
signals
RMONAR
RYRAR
Crystal
oscillator
EXTAL
XTAL
Bus interface
Peripheral bus
RSECCNT:
RMINCNT:
RHRCNT:
RWKCNT:
RDAYCNT:
RMONCNT:
RYRCNT:
R64CNT:
RFRH/L:
Second counter
Minute counter
Hour counter
Day of week counter
Date counter
Month counter
Year counter
64-Hz counter
Frequency register
RSECAR:
RMINAR:
RHRAR:
RWKAR:
RDAYAR:
RMONAR:
RYRAR:
RCR1:
RCR2:
RCR3:
RCR5:
Second alarm register
Minute alarm register
Hour alarm register
Day of week alarm register
Date alarm register
Month alarm register
Year alarm register
Control register 1
Control register 2
Control register 3
Control register 5
[Legend]
Figure 14.1 Block Diagram