H8SXSLASH1663 datasheet(591/1158 Pages) RENESAS

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Section 10 16-Bit Timer Pulse Unit (TPU)

Rev.1.00 Jun. 07, 2006 Page 539 of 1102

REJ09B0294-0100

Figure 10.4 illustrates periodic counter operation.

TCNT value

TGR

H'0000

CST bit

TGF

Time

Counter cleared by TGR

compare match

Flag cleared by software or

DTC activation

Figure 10.4 Periodic Counter Operation

(2) Waveform Output by Compare Match

The TPU can perform 0, 1, or toggle output from the corresponding output pin using a compare

match.

(a) Example of setting procedure for waveform output by compare match

Figure 10.5 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 from 0-output or 1-output,

and compare match output value from 0-output,

1-output, or toggle-output, by means of TIOR.

The set initial value is output on 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 10.5 Example of Setting Procedure for Waveform Output by Compare Match

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