HD6433937 Datasheet, PDF (192/521 Pages) Hitachi Semiconductor – Hardware Manual

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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