Overview; Functions - Panasonic F77G User Manual

Microcomputer mn101c series

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Chapter 6 8-bit Timers

Overview

This LSI contains two general purpose 8-bit timers (Timers 0 and 1) and two 8-bit timers (Timers 4 and 5)

that can be also used as baud rate timer. The general purpose 8-bit timers can be used as 16-bit timers with

cascade connection.

In a cascade connecion, timers 0, 4 and 5 form the "timer 0", or the lower 8 bits of 16-bit counter, and timers

1 form the "timer 1", or the upper 8 bits. Timers 4 and 5 cannot be cascaded.

Fosc or fs can be selected as the clock source for each timer by using the prescaler. Also, remote control

output circuit is built in.

Table 6-1-1 shows functions of each timer.

Interrupt source

Timer operation

Timer pulse output

Synchronous output

Serial transfer clock output

Pulse width measurement

Cascade connection

Premote control carrier output

Clock source

fosc: Machine clock (High speed oscillation)

fx: Machine clock (Low speed oscillation)

fs: System clock [

-When timer 4 and 5 are used as a transfer clock for serial interface 1 function, it is not used

as a general timer.

Timer Functions

Chapter 2 2.5 Clock Switching]

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