Watchdog Timer Control Registers - NEC PD78081(A) User Manual

7.3 Watchdog Timer Control Registers

The following two types of registers are used to control the watchdog timer.
• Timer clock select register 2 (TCL2)
• Watchdog timer mode register (WDTM)
(1) Timer clock select register 2 (TCL2)
This register sets the watchdog timer count clock.
TCL2 is set with 8-bit memory manipulation instruction.
RESET input sets TCL2 to 00H.
Remark Besides setting the watchdog timer count clock, TCL2 sets the buzzer output frequency.
106
CHAPTER 7 WATCHDOG TIMER