HD64F38602R Datasheet, PDF (234/552 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer

Section 12 Watchdog Timer
Figure 12.1 shows a block diagram of the WDT.
On-chip
oscillator
ROSC
φ
PSS
[φ_w/16 or φ_w/256]
TMWD
TCSRWD1
TCWD
TCSRWD2
[Legend]
TCSRWD1: Timer control/status register WD1
TCSRWD2: Timer control/status register WD2
TCWD: Timer counter WD
TMWD: Timer mode register WD
PSS:
Prescaler S
Interrupt/reset control
Internal reset signal or
interrupt request signal
Figure 12.1 Block Diagram of Watchdog Timer
12.2 Register Descriptions
The watchdog timer has the following registers.
• Timer control/status register WD1 (TCSRWD1)
• Timer control/status register WD2 (TCSRWD2)
• Timer counter WD (TCWD)
• Timer mode register WD (TMWD)
Rev. 3.00 May 15, 2007 Page 202 of 516
REJ09B0152-0300