WR
PU
RD
WR
PORT
WR
PM
PU4:
Pull-up resistor option register 4
P4:
Port register 4
PM4:
Port mode register 4
RD:
Read signal
WR××: Write signal
58
CHAPTER 4 PORT FUNCTIONS
Figure 4-9. Block Diagram of P41 and P44
PU4
PU41, PU44
Alternate
function
P4
Output latch
(P41, P44)
PM4
PM41, PM44
User's Manual U17446EJ3V1UD
V
DD
P-ch
P41/INTP3,
P44/RxD6