H8SLASH3028F datasheet(459/923 Pages) RENESAS

459 / 923 page

Rev. 2.00, 09/03, page 429 of 890

11.3.3

Normal TPC Output

Sample Setup Procedure for Normal TPC Output: Figure 11.4 shows a sample procedure for

setting up normal TPC output.

Normal TPC output

Set next TPC output data

Compare match?

Yes

Set next TPC output data

16-bit timer

setup

16-bit timer

setup

Port and

TPC setup

10.

11.

Set TIOR to make GRA an output compare

Set the TPC output trigger period.

Select the counter clock source with bits

TPSC2 to TPSC0 in TCR. Select the counter

clear source with bits CCLR1 and CCLR0.

Enable the IMFA interrupt in TIER.

The DMAC can also be set up to transfer

data to the next data register.

Set the initial output values in the DR bits

of the input/output port pins to be used for

TPC output.

Set the DDR bits of the input/output port

pins to be used for TPC output to 1.

Set the NDER bits of the pins to be used for

TPC output to 1.

Select the 16-bit timer compare match event

to be used as the TPC output trigger in TPCR.

Set the next TPC output values in the NDR bits.

Set the STR bit to 1 in TSTR to start the

timer counter.

At each IMFA interrupt, set the next output

values in the NDR bits.

Select GR functions

Set GRA value

Select counting operation

Select interrupt request

Start counter

Set initial output data

Select port output

Enable TPC output

Select TPC output trigger

Figure 11.4 Setup Procedure for Normal TPC Output (Example)

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