Overview Of Watchdog Timer; Block Diagram - Hitachi SH7750 series Hardware Manual

10.7

Overview of Watchdog Timer

10.7.1

Block Diagram

Figure 10.2 shows a block diagram of the WDT.
Standby
release
Internal reset
request
Interrupt
request
WTCSR: Watchdog timer control/status register
WTCNT: Watchdog timer counter
Rev. 4.0, 04/00, page 208 of 850
Standby
control
Reset
control
Interrupt
control
WTCSR
Figure 10.2 Block Diagram of WDT
WDT
Frequency divider
Clock selection
Overflow
WTCNT
Bus interface
Clock selector
Clock
Standby
mode
Frequency
divider 2 ×1
clock