
CHAPTER 4 PORT FUNCTIONS
User’s Manual U17854EJ9V0UD
103
Figure 4-8. Block Diagram of P11 and P14
P11/SI00/RxD0,
P14/RxD3
WRPU
RD
WRPORT
WRPM
PU11, PU14
PM11, PM14
EVDD
P-ch
PU1
PM1
P1
Output latch
(P11, P14)
Selector
Internal
bus
Alternate
function
P1:
Port register 1
PU1:
Pull-up resistor option register 1
PM1:
Port mode register 1
RD:
Read signal
WR
××: Write signal