Chapter 9
16-bit Timer
External Trigger IX - 69
■ Count Timing of External Trigger (TMCLE flag= 0)
When the TMCLE flag is set to “0” and the binary counter stops at the rising edge of the next count clock of
matching the binary counter and the compare/capture register, the binary counter is the setting value of the com-
pare/capture register + 1. When the activation trigger is fed to the pin again, the binary counter restarts to count
up.
Figure:9.11.1 Count Timing of External Trigger (TMCLE flag= 0)
■ Count Timing of External Trigger (TMCLE flag= 1)
When the TMCLE flag is set to “1” and the binary counter stops at the rising edge of the next count clock of
matching the binary counter and the compare/capture register, the binary counter is 0x0000. When the activation
trigger is fed to the pin again, the binary counter restarts to count up.
Figure:9.11.2 Count Timing of External Trigger (TMCLE flag= 1)
TMnXF
flag
00010000 0002 0003
0003
0005 0006 0007 0008 0009
0004
Count clock
Compare/capture
register
Binary counter
Activation trigger
TMnXF
flag
00010000 0002 0003
0003
0005 0006 0007 0008 0009
0004
Count clock
Compare/capture
register
Binary counter
Activation trigger
TMnXF flag
00010000 0002 0003
0003
0001 0002 0003
0000 0000
Count clock
Compare/capture
register
Binary counter
Activation trigger
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