NEC PD78078 用户手册

The following two types of registers are used to control the buzzer output function.

• Timer clock select register 2 (TCL2)

• Port mode register 3 (PM3)

This register sets the buzzer output frequency.

TCL2 is set with an 8-bit memory manipulation instruction.

RESET input sets TCL2 to 00H.

Besides setting the buzzer output frequency, TCL2 sets the watch timer count clock and the

watchdog timer count clock.