CHAPTER 4 PORT FUNCTIONS
User’s Manual U15075EJ2V1UD
84
Figure 4-7. Block Diagram of P22
Internal bus
V
DD
P-ch
P22/SS20
WR
PUB2
RD
WR
PORT
WR
PM
PUB22
Alternate
function
Output latch
(P22)
PM22
Selector
PUB2: Pull-up resistor option register B2
PM:
Port mode register
RD:
Port 2 read signal
WR:
Port 2 write signal