346
10.4
Usage Notes
10.4.1
Operation of TPC Output Pins
TP
0
to TP
15
are multiplexed with 16-bit timer, address bus, and other pin functions. When 16-bit
timer, or address bus output is enabled, the corresponding pins cannot be used for TPC output. The
data transfer from NDR bits to DR bits takes place, however, regardless of the status of the pin.
Pin functions should be changed only under conditions in which the output trigger event will not
occur.
10.4.2
Note on Non-Overlapping Output
During non-overlapping operation, the transfer of NDR bit values to DR bits takes place as
follows.
1. NDR bits are always transferred to DR bits at compare match A.
2. At compare match B, NDR bits are transferred only if their value is 0. Bits are not transferred
if their value is 1.
Figure 10.9 illustrates the non-overlapping TPC output operation.
DDR
NDER
Q
Q
TPC output pin
DR
NDR
C
Q
D
Q
D
Compare match A
Compare match B
Figure 10.9 Non-Overlapping TPC Output
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