D12320VF25V Datasheet, PDF (381/1146 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 9 16-Bit Timer Pulse Unit (TPU)
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 9.12 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 the input capture
source and input signal edge (rising edge, falling
edge, or both edges).
[1] _{[2] Set the CST bit in TSTR to 1 to start the count}
operation.
Start count
[2]
<Input capture operation>
Figure 9.12 Example of Input Capture Operation Setting Procedure
Rev.7.00 Feb. 14, 2007 page 347 of 1108
REJ09B0089-0700