HD64F2638F20J Datasheet, PDF (404/1512 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2600 Series

Section 10 16-Bit Timer Pulse Unit (TPU)
H8S/2639, H8S/2638, H8S/2636,
H8S/2630, H8S/2635 Group
Input Capture Function: The TCNT value can be transferred to TGR on detection of the TIOC
pin input edge.
Rising edge, falling edge, or both edges can be selected as the detected edge. For channels 0, 1, 3,
and 4, it is also possible to specify another channel’s counter input clock or compare match signal
as the input capture source.
Note: When another channel’s counter input clock is used as the input capture input for channels
0 and 3, φ/1 should not be selected as the counter input clock used for input capture input.
Input capture will not be generated if φ/1 is selected.
• Example of input capture operation setting procedure
Figure 10-12 shows an example of the input capture operation setting procedure.
Input selection
Select input capture input
[1] Designate TGR as an input capture register by
means of TIOR, and select rising edge, falling
edge, or both edges as the input capture source
and input signal edge.
[1] _{[2] Set the CST bit in TSTR to 1 to start the count}
operation.
Start count
[2]
<Input capture operation>
Figure 10-12 Example of Input Capture Operation Setting Procedure
Page 354 of 1458
REJ09B0103-0800 Rev. 8.00
May 28, 2010