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TMP92CM22
2007-02-16
92CM22-74
(2) Ports PF1 and PF4 (RXD0 and XD1)
In addition to function as I/O port, port PF1 and PF4 can also function as RXD input
pin of serial channel.
Figure 3.5.26 Port F (PF and PF4)
Internal data bus
Direction control
(on bit basis)
Reset
PFCR write
PF write
PF read
PF1 (RXD0)
PF4 (RXD1)
S
Output latch
S
B
Selector
A
RXD0, RXD1