180
9.2
Timer A
9.2.1
Overview
Timer A is an 8-bit timer with interval timing and time-base functions. A clock signal divided
from 76.8 kHz (if a 76.8 kHz crystal oscillator is connected), from 160 kHz (if a 160 kHz crystal
oscillator is connected), or from the system clock, can be output at the TMOW pin.
1. Features
Features of timer A are given below.
•
Choice of eight internal clock sources (ø/8192, ø/4096, ø/2048, ø/512, ø/256, ø/128, ø/32, ø/8).
•
Choice of four overflow periods (ø
w
/32768, ø
w
/16384, ø
w
/8192, ø
w
/1024) when timer A is used
as a time base.
•
An interrupt is requested when the counter overflows.
•
Any of nine clock signals can be output at the TMOW pin: ø
w
divided by 32, 16, 8, or 4 and
the system clock divided by 32, 16, 8, or 4.
•
Use of module standby mode enables this module to be placed in standby mode independently
when not used.
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