Block Diagram; Figure 11.1 Block Diagram Of Rtc - Hitachi SH7751 Hardware Manual

11.1.2

Block Diagram

Figure 11.1 shows a block diagram of the RTC.
RTCCLK
16.384 kHz
Prescaler
128 Hz
R64CNT
RSECCNT RMINCNT
RSECAR RMINAR
Note: * SH7751R only
Rev. 3.0, 04/02, page 264 of 1064
RTC crystal
32.768 kHz
oscillator
Counter unit
RHRCNT
RHRAR

Figure 11.1 Block Diagram of RTC

ATI
PRI
CUI
Interrupt
control unit
RDAYCNT RWKCNT
RDAYAR RWKAR
To registers
Bus interface
Internal peripheral module bus
RESET, STBY, etc
RTC operation
control unit
RCR1
RCR2
RCR3
RMONCNT RYRCNT
RMONAR RYRAR
*
*