Example Of Non-Overlapping Pulse Output (Example Of Four-Phase Complementary Non-Overlapping Output) - Hitachi H8S/2378, H8S/2378R Series Hardware Manual

12.4.6 Example of Non-Overlapping Pulse Output (Example of Four-Phase
Complementary Non-Overlapping Output)
Figure 12.9 shows an example in which pulse output is used for four-phase complementary non-
overlapping pulse output.
TCNT value
TGRB
TGRA
H'0000
NDRH
PODRH
PO15
PO14
PO13
PO12
PO11
PO10
PO9
PO8
Figure 12.9 Non-Overlapping Pulse Output Example (Four-Phase Complementary)
1. Set up the TPU channel to be used as the output trigger channel so that TGRA and TGRB are
output compare registers. Set the trigger period in TGRB and the non-overlap margin in
TGRA, and set the counter to be cleared by compare match B. Set the TGIEA bit in TIER to 1
to enable the TGIA interrupt.
2. Write H'FF in P1DDR and NDERH, and set the G3CMS1, G3CMS0, G2CMS1, and G2CMS0
bits in PCR to select compare match in the TPU channel set up in the previous step to be the
output trigger. Set the G3NOV and G2NOV bits in PMR to 1 to select non-overlapping output.
Write output data H'95 in NDRH.
3. The timer counter in the TPU channel starts. When a compare match with TGRB occurs,
outputs change from 1 to 0. When a compare match with TGRA occurs, outputs change from 0
TCNT
95 65 59
00 95 05 65
Non-overlap margin
56 95
41 59 50 56 14
Time
65
95 05 65
Rev. 1.0, 09/01, page 587 of 904