HD6417706 Datasheet, PDF (372/709 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer Super RISC engine Family/SH7700 Series

Externally
connected
circuit
EXTAL2
XTAL2
RTCCLK
Oscillator
circuit
32.768 kHz
Prescaler
(÷ 2)
16.384 kHz
Prescaler
(÷ 128)
128 Hz
Reset
30-
second
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. 4.00, 03/04, page 326 of 660