Datasheet

Section 11 16-Bit Timer Pulse Unit (TPU)
R01UH0309EJ0500 Rev. 5.00 Page 749 of 1408
Sep 24, 2012
H8S/2456, H8S/2456R, H8S/2454 Group
(b) Example of input capture operation
Figure 11.10 shows an example of input capture operation.
In this example both rising and falling edges have been selected as the TIOCA pin input capture
input edge, falling edge has been selected as the TIOCB pin input capture input edge, and counter
clearing by TGRB input capture has been designated for TCNT.
TCNT value
H'0180
H'0000
TIOCA
TGRA
Time
H'0010
H'0005
Counter cleared by TIOCB
input (falling edge)
H'0160
H'0005 H'0160 H'0010
TGRB
H'0180
TIOCB
Figure 11.10 Example of Input Capture Operation
11.4.2 Synchronous Operation
In synchronous operation, the values in multiple TCNT counters can be rewritten simultaneously
(synchronous presetting). Also, multiple of TCNT counters can be cleared simultaneously
(synchronous clearing) by making the appropriate setting in TCR.
Synchronous operation enables TGR to be incremented with respect to a single time base.
Channels 0 to 5 and 6 to 11 can all be designated for synchronous operation.