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WR
PU
RD
WR
PORT
WR
PM
P4:
Port register 4
PU4:
Pull-up resistor option register 4
PM4:
Port mode register 4
RD:
Read signal
WR××: Write signal
112
CHAPTER 4 PORT FUNCTIONS
Figure 4-15. Block Diagram of P41
PU4
PU41
P4
Output latch
(P41)
PM4
PM41
Alternate
function
User's Manual U17854EJ9V0UD
EV
DD
P-ch
P41/TOOL1
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