SH7708 Datasheet, PDF (338/633 Pages) Renesas Technology Corp – SuperH™ RISC engine

Externally
connected
circuit
EXTAL2
XTAL2
RTCCLK
Oscillator
circuit
32.768 kHz
Prescaler
(÷ 2)
16.384 kHz
Prescaler
(÷ 128)
30-
second
Reset ADJ
128 Hz
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
RCR1
RCR2
RTC
Figure 12.1 RTC Block Diagram
320