H8SSLASH2225 datasheet(486/1071 Pages) RENESAS

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Section 11 16-Bit Timer Pulse Unit (TPU)

Rev. 5.00 Aug 08, 2006 page 400 of 982

REJ09B0054-0500

TCNT value

TGR

H'0000

CST bit

TGF

Time

Counter cleared by TGR

compare match

Flag cleared by software, DTC, or

DMAC* activation

Note: * Supported only by the H8S/2239 Group.

Figure 11.5 Periodic Counter Operation

Waveform Output by Compare Match: The TPU can perform 0, 1, or toggle output from the

corresponding output pin using a compare match.

1. Example of setting procedure for waveform output by compare match

Figure 11.6 shows an example of the setting procedure for waveform output by a compare

match.

Select waveform output mode

Output selection

Set output timing

Start count

[1]

[2]

[3]

[1]

Select initial value 0 output or 1 output, and

compare match output value 0 output, 1 output,

or toggle output, by means of TIOR. The set

initial value is output at the TIOC pin until the

first compare match occurs.

[2]

Set the timing for compare match generation in

TGR.

[3]

Set the CST bit in TSTR to 1 to start the count

operation.

Figure 11.6 Example of Setting Procedure for Waveform Output by Compare Match

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