HD64F7047 datasheet(238/764 Pages) RENESAS

238 / 764 page

Rev. 2.00, 09/04, page 198 of 720

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 and 1,

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 1,

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.

1. Example of Input Capture Operation Setting Procedure

Figure 10.9 shows an example of the input capture operation setting procedure.

Input selection

Select input capture input

Start count

[1]

[2]

[1] Designate TGR as an input capture

rising edge, falling edge, or both edges

as the input capture source and input

signal edge.

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

the count operation.

Figure 10.9 Example of Input Capture Operation Setting Procedure

2. Example of Input Capture Operation

Figure 10.10 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, the 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.

HD64F7047 Datasheet(PDF) 238 Page - Renesas Technology Corp