D12320VF25IV Datasheet, PDF (579/1304 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 11 Programmable Pulse Generator (PPG)
11.3.3 Normal Pulse Output
Sample Setup Procedure for Normal Pulse Output: Figure 11.4 shows a sample procedure for
setting up normal pulse output.
TPU setup
Port and
PPG setup
TPU setup
Normal PPG output
Select TGR functions
[1]
Set TGRA value
[2]
Set counting operation [3]
Select interrupt request [4]
Set initial output data
[5]
Enable pulse output
[6]
Select output trigger
[7]
Set next pulse
output data
[8]
Start count
Compare match?
Yes
Set next pulse
output data
[9]
No
[10]
[1] Set TIOR to make TGRA an output
compare register (with output
disabled).
[2] Set the PPG output trigger period.
[3] Select the counter clock source
with bits TPSC2 to TPSC0 in TCR.
Select the counter clear source
with bits CCLR1 and CCLR0.
[4] Enable the TGIA interrupt in TIER.
The DTC or DMAC* can also be
set up to transfer data to NDR.
[5] Set the initial output values in
PODR.
[6] Set the DDR and NDER bits for the
pins to be used for pulse output to 1.
[7] Select the TPU compare match
event to be used as the output
trigger in PCR.
[8] Set the next pulse output values in
NDR.
[9] Set the CST bit in TSTR to 1 to
start the TCNT counter.
[10] At each TGIA interrupt, set the next
output values in NDR.
Note:* The DMAC is not supported in
the H8S/2321.
Figure 11.4 Setup Procedure for Normal Pulse Output (Example)
Rev.6.00 Sep. 27, 2007 Page 547 of 1268
REJ09B0220-0600