WR
PU
Alternate
RD
WR
PORT
Output latch
WR
PM
Alternate
PU3:
Pull-up resistor option register 3
PM3: Port mode register 3
RD:
Read signal
WR××: Write signal
110
CHAPTER 4 PORT FUNCTIONS
Figure 4-13. Block Diagram of P33
PU3
PU33
function
(P33)
PM3
PM33
function
User's Manual U15947EJ2V0UD
EV
*
DD
P-ch
P33/INTP4/TI51/TO51