HD6417751 Datasheet, PDF (304/1105 Pages) Renesas Technology Corp – SuperH RISC engine

11.1.2 Block Diagram
Figure 11.1 shows a block diagram of the RTC.
RTCCLK
16.384 kHz
Prescaler
128 Hz
32.768 kHz ^{RTC crystal}
oscillator
R64CNT
Counter unit
ATI
PRI
CUI
RESET, STBY, etc
RTC operation
control unit
Interrupt
control unit
RCR1
RCR2
*
RCR3
RSECCNT RMINCNT RHRCNT RDAYCNT RWKCNT RMONCNT RYRCNT
RSECAR
RMINAR
RHRAR
RDAYAR
RWKAR
RMONAR
*
RYRAR
To registers
Bus interface
Note: * SH7751R only
Internal peripheral module bus
Figure 11.1 Block Diagram of RTC
Rev. 3.0, 04/02, page 264 of 1064