Non-Overlapping Pulse Output; Figure 11.6 Non-Overlapping Pulse Output - Renesas H8S/2368 Series Hardware Manual

11.4.4

Non-Overlapping Pulse Output

During non-overlapping operation, transfer from NDR to PODR is performed as follows:
• NDR bits are always transferred to PODR bits at compare match A.
• At compare match B, NDR bits are transferred only if their value is 0. Bits are not transferred
if their value is 1.
Figure 11.6 illustrates the non-overlapping pulse output operation.
Pulse
output
pin
Therefore, 0 data can be transferred ahead of 1 data by making compare match B occur before
compare match A.
The NDR contents should not be altered during the interval from compare match B to compare
match A (the non-overlap margin).
This can be accomplished by having the TGIA interrupt handling routine write the next data in
NDR, or by having the TGIA interrupt activate the DTC or DMAC. Note, however, that the next
data must be written before the next compare match B occurs.
Figure 11.7 shows the timing of this operation.
DDR NDER
Q
Normal output/inverted output

Figure 11.6 Non-Overlapping Pulse Output

Q
C
PODR D Q
Rev. 2.00, 05/03, page 467 of 820
Compare match A
Compare match B
Internal data bus
NDR D