Watchdog Timer Configuration - NEC mPD789426 Series User Manual

9.2 Watchdog Timer Configuration

The watchdog timer includes the following hardware.
Item
Control registers Watchdog timer clock select register (WDCS)
Watchdog timer mode register (WDTM)
f
X
Prescaler
2 4
f f
X X
2 6 2 8
Watchdog timer clock select register
178
CHAPTER 9 WATCHDOG TIMER
Table 9-3. Configuration of Watchdog Timer
Figure 9-1. Block Diagram of Watchdog Timer
f
X
2 10
7-bit counter
3
TCL22 TCL21 TCL20
(WDCS)
Internal bus
User's Manual U15075EJ1V0UM00
Configuration
Internal bus
TMIF4
Controller
Clear
RUN WDTM4 WDTM3
Watchdog timer mode register (WDTM)
TMMK4
INTWDT
Maskable
interrupt request
RESET
INTWDT
Non-maskable
interrupt request