Datasheet

CHAPTER 4 PORT FUNCTIONS
User’s Manual U18172EJ3V0UD
63
Figure 4-7. Block Diagram of P23 ( μ PD78F950x)
P23/EXCLK
WR
PU
RD
PU23
WR PM
PM23
P-ch
PU2
PM2
WR PORT
P2
Internal bus
Output latch
(P23)
Selector
V DD
P2: Port register 2
PU2: Pull-up resistor option register 2
PM2: Port mode register 2
RD: Read signal
WR××: Write signal
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