Watchdog Timer Configuration; Watchdog Timer Block Diagram - NEC PD78081(A) User Manual

7.2 Watchdog Timer Configuration

The watchdog timer consists of the following hardware.
Control register
3
f /2
Prescaler
XX
f f f f
XX XX XX XX
4 5 6
2 2 2 2
Timer Clock Select Register 2
CHAPTER 7 WATCHDOG TIMER
Table 7-3. Watchdog Timer Configuration
Item
Timer clock select register 2 (TCL2)
Watchdog timer mode register (WDTM)
Figure 7-1. Watchdog Timer Block Diagram
f f f
XX XX XX
7 8 9 11
2 2 2
3
TCL22 TCL21 TCL20
Configuration
RUN
8-Bit Counter
Control
Circuit
WDTM4 WDTM3
Watchdog Timer Mode Register
Internal Bus
Internal Bus
TMMK4
INTWDT
Maskable
TMIF4
Interrupt
Request
RESET
INTWDT
Non-Maskable
Interrupt
Request
105