H8SXSLASH1663R datasheet(766/1504 Pages) RENESAS

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Section 14 16-Bit Timer Pulse Unit (TPU)

Rev. 2.00 Sep. 24, 2008 Page 734 of 1468

REJ09B0412-0200

(3)

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 detection 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, P

φ/1 should not be selected as the counter input clock used for input

capture input. Input capture will not be generated if P

φ/1 is selected.

(a)

Example of setting procedure for input capture operation

Figure 14.9 shows an example of the setting procedure for input capture operation.

Select input capture input

Input selection

Start count

[1]

[2]

[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).

[2] Set the CST bit in TSTR to 1 to start the count

operation.

Figure 14.9 Example of Setting Procedure for Input Capture Operation

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