SH7713 Datasheet, PDF (546/904 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series

Section 15 Realtime Clock (RTC)
Externally
connected
circuit
EXTAL2
XTAL2
Oscillator
circuit
128Hz
32.768 kHz
Prescaler
(÷ 2)
16.384 kHz
Prescaler
(÷ 128)
30-
second
Reset _ADJ
R64CNT
RSECCNT
RMINCNT
RHRCNT
RWKCNT
RDAYCNT
RMONCNT
RYRCNT
Bus
interface
ATI
Interrupt
control
PRI
circuit
Carry
CUI
detection
circuit
Comparator
RSECAR
RMINAR
RHRAR
RWKAR
RDAYAR
RMONAR
RYRAR
RCR1
RCR2
RCR3
[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
RSECAR: Second alarm register
RTC
RMINAR: Minute alarm register
RHRAR: Hour alarm register
RWKAR: Day of the week alarm register
RDAYAR: Date alarm register
RMONAR: Month alarm register
RYRAR: Year alarm register
RCR1: RTC control register 1
RCR2: RTC control register 2
RCR3: RTC control register 3
Figure 15.1 RTC Block Diagram
Rev.1.50 Aug. 30, 2006 Page 506 of 860
REJ09B0288-0150