SH7706 Datasheet, PDF (388/749 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH™ RISC engine Family/SH7700 Series

Section 13 Realtime Clock (RTC)
Externally
connected
circuit
EXTAL2
XTAL2
RTCCLK
Oscillator
circuit
32.768 kHz
Prescaler
(÷ 2)
16.384 kHz
Prescaler
(÷ 128)
128 Hz
30-
second
Reset ADJ
R64CNT
RSECCNT
RMINCNT
RHRCNT
RWKCNT
RDAYCNT
RMONCNT
RYRCNT
Bus
interface
ATI
Interrupt
control
circuit
PRI
Carry
CUI
detection
circuit
Comparator
RSECAR
RMINAR
RHRAR
RWKAR
RDAYAR
RMONAR
RCR1
RCR2
Legend:
R64CNT: 64-Hz counter
RSECCNT: Second counter
RMINCNT: Minute counter
RHRCNT: Hour counter
RWKCNT: Day of the week counter
RDAYCNT: Date counter
RMONCNT: Month counter
RYRCNT: Year counter
RTC
RSECAR: Second alarm register
RHRAR: Minute alarm register
RMINAR: Hour alarm register
RWKAR: Day of the week alarm register
RDAYAR: Date alarm register
RMONAR: Month alarm register
RCR1: RTC control register 1
RCR2: RTC control register 2
Figure 13.1 RTC Block Diagram
Rev. 5.00 May 29, 2006 page 340 of 698
REJ09B0146-0500