SH7261 Datasheet, PDF (672/1348 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7260 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
RCR1
RCR2
RCR3
RWKCNT
RWKAR
Interrupt
control circuit
RMONCNT
RYRCNT
RMONAR
RYRAR
[Legend]
RSECCNT: Second counter (8 bits)
RMINCNT: Minute counter (8 bits)
RHRCNT: Hour counter (8 bits)
RWKCNT: Day of week counter (8 bits)
RDAYCNT: Date counter (8 bits)
RMONCNT: Month counter (8 bits)
RYRCNT: Year counter (16 bits)
R64CNT: 64-Hz counter (8 bits)
RCR1:
RTC control register 1 (8 bits)
RSECAR: Second alarm register (8 bits)
RMINAR: Minute alarm registger (8 bits)
RHRAR: Hour alarm register (8 bits)
RWKAR: Day of week alarm register (8 bits)
RDAYAR: Date alarm register (8 bits)
RMONAR: Month alarm register (8 bits)
RYRAR: Year alarm register (16 bits)
RCR2: RTC control register 2 (8 bits)
RCR3: RTC control register 3 (8 bits)
Figure 15.1 RTC Block Diagram
ARM
PRD ^Interrupt
CUP ^signals
Rev. 2.00 Sep. 07, 2007 Page 640 of 1312
REJ09B0320-0200