Datasheet

Section 13 Watchdog Timer
Rev.6.00 Sep. 27, 2007 Page 582 of 1268
REJ09B0220-0600
13.1.2 Block Diagram
Figure 13.1 shows a block diagram of the WDT.
Overflow
Interrupt
control
WOVI
(interrupt request
signal)
WDTOVF
*1
Internal reset signal
*2
Reset
control
RSTCSR TCNT TSCR
φ/2
φ/64
φ/128
φ/512
φ/2048
φ/8192
φ/32768
φ/131072
Clock
Clock
select
Internal clock
sources
Bus
interface
Module bus
Legend:
TCSR:
TCNT:
RSTCSR:
Notes:
Timer control/status register
Timer counter
Reset control/status register
Internal bus
WDT
1. The WDTOVF pin function cannot be used in the F-ZTAT versions.
2. Internal reset signal generation is specified by means of a register setting.
Figure 13.1 Block Diagram of WDT