SH7763 Datasheet, PDF (826/2026 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC Engine Family SH-4A Series

Section 22 Realtime Clock (RTC)
22.1.1 Block Diagram
Figure 22.1 shows a block diagram of the RTC.
RTC clock output
16.384 kHz
Prescaler
32.768 kHz
128 kHz
RTC crystal
oscillator
R64CNT
Counter unit
AT I
PRI
CUI
Reset
RTC operation
control unit
Interr upt
control unit
RCR1
RCR2
RCR3
RSECCNT RMINCNT
RHRCNT RDAYCNT
RWKCNT RMONCNT
RYRCNT
RSECAR
RMINAR
RHRAR
RDAYAR
RWKAR
To registers
RMONAR
RYRAR
Bus interface
Internal peripheral module bus
Figure 22.1 Block Diagram of RTC
Rev. 1.00 Oct. 01, 2007 Page 760 of 1956
REJ09B0256-0100