HD64F2357VF13 Datasheet, PDF (484/1049 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

13.1.2 Block Diagram
Figure 13-1 shows a block diagram of the WDT.
WOVI
(interrupt request
signal)
WDTOVF^*2
Internal reset signal^*1
Interrupt
control
Reset
control
Overflow
Clock
Clock
select
ø/2
ø/64
ø/128
ø/512
ø/2048
ø/8192
ø/32768
ø/131072
Internal clock
sources
RSTCSR
TCNT
TSCR
Module bus
Bus
interface
WDT
Legend:
TCSR: Timer control/status register
TCNT: Timer counter
RSTCSR: Reset control/status register
Notes: 1. The type of internal reset signal depends on a register setting. Either power-on
reset or manual reset can be selected. Manual reset is only supported in the H8S/2357 ZTAT.
2. The WDTOVF pin function is not available in the F-ZTAT version, the H8S/2398, H8S/2394, H8S/2392,
or H8S/2390.
Figure 13-1 Block Diagram of WDT
13.1.3 Pin Configuration
Table 13-1 describes the WDT output pin.
Table 13-1 WDT Pin
Name
Symbol I/O
Function
Watchdog timer overflow
WDTOVF* Output Outputs counter overflow signal in watchdog
timer mode
Note: * The WDTOVF pin function is not available in the F-ZTAT version, the H8S/2398, H8S/2394, H8S/2392 or
H8S/2390.
Rev.6.00 Oct.28.2004 page 454 of 1016
REJ09B0138-0600H