Non-Overlapping Pulse Output; Figure 10.6 Non-Overlapping Pulse Output - Renesas H8SX/1520 Series Hardware Manual

10.4.4

Non-Overlapping Pulse Output

During non-overlapping operation, transfer from NDR to PODR is performed as follows:
• At compare match A, the NDR bits are always transferred to PODR.
• At compare match B, the NDR bits are transferred only if their value is 0. The NDR bits are
not transferred if their value is 1.
Figure 10.6 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-overlapping 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 DMAC. Note, however, that the next data must
be written before the next compare match B occurs.
Downloaded from Elcodis.com electronic components distributor
NDER
Q
C
Q PODR
Normal output/inverted output

Figure 10.6 Non-Overlapping Pulse Output

Section 10 Programmable Pulse Generator (PPG)
Compare match A
Compare match B
D Q NDR
Rev. 3.00 Mar. 14, 2006 Page 359 of 804
Internal data bus
D
REJ09B0104-0300