Datasheet

CHAPTER 4 PORT FUNCTIONS
User’s Manual U18172EJ3V0UD
59
Figure 4-4. Block Diagram of P23 ( μ PD78F920x)
P23/ANI3/X1
WR
PU
WR PMC
RD
PU23
WR PM
PM23
V DD
P-ch
PU2
PMC2
PM2
WR PORT
Output latch
(P23)
PMC23
A/D converter
Internal bus
Selector
P2
P2: Port register 2
PU2: Pull-up resistor option register 2
PM2: Port mode register 2
PMC2: Port mode control register 2
RD: Read signal
WR××: Write signal