HD6473887 Datasheet, PDF (257/523 Pages) Renesas Technology Corp – Hitachi Single-Chip Microcomputer

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 (216) events.
• 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.
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