Renesas Stereo System SH7709S 사용자 설명서
Rev. 5.00, 09/03, page 408 of 760
13.1.2
Block Diagram
Figure 13.1 shows a block diagram of the RTC.
Module bus
RTC
Internal bus
Interrupt
control
circuit
Prescaler
(
÷
2)
RTCCLK
Bus
interface
Carry
detection
circuit
ATI
PRI
CUI
Legend
R64CNT:
R64CNT:
64 Hz counter
RSECCNT: Second
counter
RMINCNT: Minute
counter
RHRCNT: Hour
counter
RWKCNT: Day-of-week
counter
RDAYCNT: Day
counter
RMONCNT: Month counter
RYRCNT: Year
RYRCNT: Year
counter
RSECAR:
Second alarm register
RMINAR:
Minute alarm register
RHRAR:
Hour alarm register
RWKAR:
Day-of-week alarm register
RDAYAR:
Day alarm register
RMONAR:
Month alarm register
RCR1:
RTC control register 1
RCR2:
RTC control register 2
R64CNT
Reset
RSECCNT
RMINCNT
RHRCNT
RWKCNT
16.384 kHz
RDAYCNT
RMONCNT
RYRCNT
Comparator
RSECAR
RMINAR
RHRAR
RWKAR
RDAYAR
RCR1
RCR2
30-
second
ADJ
EXTAL2
32.768 kHz
128 Hz
XTAL2
Externally
connected
circuit
Oscillator
circuit
Prescaler
(
÷
128)
RMONAR
Figure 13.1 Block Diagram of RTC