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A mask operation
For A mask, the above operation is modified as follows:
In complementary PWM mode, buffer register compare-match flags can be set only for
compare with three counters (TCNT3, TCNT4, and TCNTS).
Special properties of compare match flag disappear and compare match flags of buffer
registers are set to all set values of buffer registers.
Figure 12.92 shows an example when setting the duty setting register to TGR3B, buffer
register to TGR3D and Buffer register to TGR3A-Td.
TGR3A
TCDR
(TGR3A -Td)
TGR3B
TDDR
H'0000
TIOC3A
TIOC3B
TIOC3D
Point a
Point b
Point c
Point d
TGF3B setting
signal
TGF3D setting
signal
TCNT3
TGR3D
TCNT4
TGR3B,
TGR3D
Set signals are output when:
Point a: TGR3D setting is Td
Point b: TGR3D settings are TGR3A-Td, TGR3A-2Td
Point c: TGR3D settings are Td, 2Td
Point d: TGR3D settings are TGR3A-Td, TGR3A-2Td
Figure. 12.92 Special Properties of Compare Match Flag in Complementary PWM Mode
(for A Mask)
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