Electronics America Single-Chip Microcontrollers User's Manual

CHAPTER 4 PORT FUNCTIONS
82 User’s Manual U15331EJ4V1UD
Figure 4-7. Block Diagram of P23
Internal bus
VDD
P-ch
P23/SCK10
WR
PUB2
RD
WR
PORT
WRPM
PUB23
Alternate
function
Output latch
(P23)
PM23
Alternate
function
Selector
PUB2: Pull-up resistor option register B2
PM: Port mode register
RD: Port 2 read signal
WR: Port 2 write signal