h8s-2649 Renesas Electronics Corporation., h8s-2649 Datasheet - Page 366
h8s-2649
Manufacturer Part Number
h8s-2649
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2649.pdf
(766 pages)
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Section 11 Programmable Pulse Generator (PPG)
11.4.4
Figure 11.5 shows an example in which pulse output is used for cyclic five-phase pulse output.
1. Set up TGRA of the TPU that is used as the output trigger to be an output compare register.
2. Write H'F8 in P1DDR and NDERH, and set the G3CMS0, G3CMS1, G2CMS0, and G2CMS1
3. When compare match A occurs, the NDRH contents are transferred to PODRH and output.
4. Five-phase overlapping pulse output (one or two phases active at a time) can be obtained
Rev. 2.00 Dec. 05, 2005 Page 328 of 724
REJ09B0200-0200
TGRA
H'0000
NDRH
PODRH
PO15
PO14
PO13
PO11
TCNT value
PO12
Set a frequency in TGRA so the counter will be cleared on compare match A. Set the TGIEA
bit of TIER to 1 to enable the compare match/input capture A (TGIA) interrupt.
bits in PCR to select compare match in the TPU channel set up in the previous step to be the
output trigger. Write output data H'80 in NDRH.
The TGIA interrupt handling routine writes the next output data (H'C0) in NDRH.
subsequently by writing H'40, H'60, H'20, H'30. H'10, H'18, H'08, H'88... at successive TGIA
interrupts. If the DTC is set for activation by this interrupt, pulse output can be obtained
without imposing a load on the CPU.
Example of Normal Pulse Output (Example of Five-Phase Pulse Output)
Figure 11.5 Normal Pulse Output Example (Five-Phase Pulse Output)
00
80
TCNT
80
C0
C0
40
40
60
Compare match
60
20
20
30
30
10
10
18
18
08
08
88
88
80
80
C0
C0
40
Time
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