Example of Non-Overlapping TPC Output (Example of Four-Phase Complementary Non-
Overlapping Output): Figure 11-7 shows an example of the use of TPC output for four-phase
complementary non-overlapping pulse output.
Figure 11-7 Non-Overlapping TPC Output Example (Four-Phase Complementary
Non-Overlapping Pulse Output)
GRB
H'0000
NDRB
PBDR
TP
15
TP
14
TP
13
TP
12
TP
11
TP
10
TP
9
TP
8
Time
95
00
65
95
59
56
95
65
05
65
41
59
50
56
14
95
05
65
TCNT
H'FF is written in PBDDR and NDERB, and bits G3CMS1, G3CMS0, G2CMS1, and G2CMS0 are set
TCNT value
Non-overlap margin
The output trigger ITU channel is set up so that GRA and GRB are output compare registers and the
counter will be cleared by compare match B. The TPC output trigger period is set in GRB. The non-
overlap margin is set in GRA. The IMIEA bit is set to 1 in TIER to enable IMFA interrupts.
This operation example is described below.
•
•
•
•
Bits G3NOV and G2NOV are set to 1 in TPMR to select non-overlapping output. Output data H'95 is
written in NDRB.
The timer counter in this ITU channel is started. When compare match B occurs, outputs change from
in TPCR to select compare match in the ITU channel set up in step 1 as the output trigger.
1 to 0. When compare match A occurs, outputs change from 0 to 1 (the change from 0 to 1 is delayed
by the value of GRA). The IMFA interrupt service routine writes the next output data (H'65) in NDRB.
Four-phase complementary non-overlapping pulse output can be obtained by writing H'59, H'56, H'95…
at successive IMFA interrupts. If the DMAC is set for activation by this interrupt, pulse output can be
obtained without loading the CPU.
GRA
417
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