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CHAPTER 4 PORT FUNCTIONS
User’s Manual U15075EJ2V1UD
86
Figure 4-9. Block Diagram of P24
PUB2: Pull-up resistor option register B2
PM:
Port mode register
RD:
Port 2 read signal
WR:
Port 2 write signal
Internal bus
V
DD
P24/SO20/TxD20
WR
PUB2
RD
WR
PORT
WR
PM
PUB24
Alternate
function
Output latch
(P24)
PM24
Selector
P-ch
SS20
output