CHAPTER 4 PORT FUNCTIONS
Preliminary User’s Manual U16898EJ1V0UD
51
Figure 4-6. Block Diagram of P41 and P44
P41/INTP3,
P44/RxD6
WR
PU
RD
WR
PORT
WR
PM
PU41, PU44
Alternate
function
Output latch
(P41, P44)
PM41, PM44
V
DD
P-ch
PU4
PM4
Internal bus
Selector
PU4:
Pull-up resistor option register 4
PM4:
Port mode register 4
RD:
Read signal
WR
××
: Write signal
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