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MULTIJUNCTION TIMERS
10.3 TOP (Output-Related 16-Bit Timer)
32180 Group User’s Manual (Rev.1.0)
(2) Precautions on using TOP continuous output mode
The following describes precautions to be observed when using TOP continuous output mode.
• If the timer is enabled by external input in the same clock period as count is disabled by writing to the enable
bit, the latter has priority so that count is disabled.
• If the counter is accessed for read immediately after being reloaded pursuant to an underflow, the counter
value temporarily reads as H’FFFF but immediately changes to (reload value – 1) at the next clock edge.
• Because the timer operates synchronously with the count clock, a count clock-dependent delay is included
before F/F output is inverted after the timer is enabled.
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