r4f2426 Renesas Electronics Corporation., r4f2426 Datasheet - Page 816

• Manufacturer Part Number: r4f2426
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
• Manufacturer: Renesas Electronics Corporation.

Section 12 Programmable Pulse Generator (PPG)
12.4.4
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
Figure 12.6 illustrates the non-overlapping pulse output operation.
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.
Rev. 1.00 Sep. 19, 2008 Page 788 of 1270
REJ09B0466-0100
if their value is 1.
Pulse
output
pin
Non-Overlapping Pulse Output
DDR
Figure 12.6 Non-Overlapping Pulse Output
Normal output/inverted output
Q
NDER
Q
PODR
C
D
Q
NDR
Compare match A
Compare match B
D
Internal data bus