Asynchronous Event Counter (Aec); Overview - Hitachi HD6473867 Hardware Manual

9.7 Asynchronous Event Counter (AEC)

9.7.1

Overview

The asynchronous event counter is incremented by external event clock input.
1. Features
Features of the asynchronous event counter are given below.
• Can count asynchronous events
Can count external events input asynchronously without regard to the operation of base clocks ø and
ø .
SUB
The counter has a 16-bit configuration, enabling it to count up to 65536 (2
• Can also be used as two independent 8-bit event counter channels.
• Counter resetting and halting of the count-up function controllable by software
• Automatic interrupt generation on detection of event counter overflow
• Use of module standby mode enables this module to be placed in standby mode independently
when not used.
239
16
) events.