
CHAPTER 4 PORT FUNCTIONS
User’s Manual U17854EJ9V0UD
108
Figure 4-12. Block Diagram of P20 to P27
Internal
bus
P20/ANI0 to
P27/ANI7
RD
WRPORT
WRPM
Output latch
(P20 to P27)
PM20 to PM27
Selector
PM2
A/D converter
P2
P2:
Port register 2
PM2:
Port mode register 2
RD:
Read signal
WR
××: Write signal