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
54
CHAPTER 4 PORT FUNCTIONS
Figure 4-6. Block Diagram of P40 and P45
PU4
PU40, PU45
P4
Output latch
(P40, P45)
PM4
PM40, PM45
User's Manual U16898EJ3V0UD
V
DD
P-ch
P40, P45