HD6433802H Datasheet, PDF (190/435 Pages) Hitachi Semiconductor – Single-Chip Microcomputer

9.2 Timer A
9.2.1 Overview
Timer A is an 8-bit timer with interval timing and real-time clock time-base functions. The clock
time-base function is available when a 32.768 kHz crystal oscillator is connected.
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 (1 s, 0.5 s, 0.25 s, 31.25 ms) when timer A is used as a clock
time base (using a 32.768 kHz crystal oscillator).
• An interrupt is requested when the counter overflows.
• Use of module standby mode enables this module to be placed in standby mode independently
when not used.
172