H8S2245 datasheet(368/818 Pages) RENESAS

368 / 818 page

Section 9 16-Bit Timer Pulse Unit (TPU)

Rev.3.00 Mar. 26, 2007 Page 326 of 772

REJ09B0355-0300

Example of Synchronous Operation Setting Procedure

Figure 9.14 shows an example of the synchronous operation setting procedure.

Set synchronous

operation

Synchronous operation

selection

Set TCNT

Synchronous presetting

[1]

[2]

Synchronous clearing

Select counter

clearing source

[3]

Start count

[5]

Set synchronous

counter clearing

[4]

Start count

[5]

Clearing

sourcegeneration

channel?

Yes

[1]

[2]

[3]

[4]

[5]

Set to 1 the SYNC bits in TSYR corresponding to the channels to be designated for synchronous

operation.

When the TCNT counter of any of the channels designated for synchronous operation is

written to, the same value is simultaneously written to the other TCNT counters.

Use bits CCLR2 to CCLR0 in TCR to specify TCNT clearing by input capture/output compare,

etc.

Use bits CCLR2 to CCLR0 in TCR to designate synchronous clearing for the counter clearing

source.

Set to 1 the CST bits in TSTR for the relevant channels, to start the count operation.

Figure 9.14 Example of Synchronous Operation Setting Procedure

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