SH7205 Datasheet, PDF (732/1904 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7200 Series

Section 15 Realtime Clock (RTC)
Figure 15.1 shows the block diagram of RTC.
Externally
connected
circuit
RTC_X1
Oscillator
circuit
RTC_X2
128 Hz
32.768 kHz
Prescaler
R64CNT
RSECCNT
RMINCNT
Count
RSECAR
RMINAR
RHRCNT
RHRAR
RDAYCNT RDAYAR
RTC operation
control circuit
RWKCNT RWKAR
RCR1
RCR2
RCR3
RMONCNT
Interrupt
control circuit
RYRCNT
RMONAR
RYRAR
[Legend]
RSECCNT: Second counter
RMINCNT: Minute counter
RHRCNT: Hour counter
RWKCNT: Day of week counter
RDAYCNT: Date counter
RMONCNT: Month counter
RYRCNT: Year counter
R64CNT: 64-Hz counter
RCR1:
RTC control register 1
RSECAR: Second alarm register
RMINAR: Minute alarm register
RHRAR: Hour alarm register
RWKAR: Day of week alarm register
RDAYAR: Date alarm register
RMONAR: Month alarm register
RYRAR: Year alarm register
RCR2: RTC control register 2
RCR3: RTC control register 3
Figure 15.1 RTC Block Diagram
ARM
PRD ^Interrupt
CPU ^signals
Rev. 1.00 Mar. 25, 2008 Page 700 of 1868
REJ09B0372-0100