CHAPTER 4 PORT FUNCTIONS
User's Manual U11919EJ3V0UM00
79
Figure 4-10. Block Diagram of P51
Internal Bus
V
DD0
P-ch
P51/TO2
WR
PUO
RD
WR
PORT
WR
PM
PUO5
Output Latch
(P51)
PM51
Alternate
Function
Selector
PUO : Pull-up resistor option register
PM
: Port mode register
RD
: Port 5 read signal
WR : Port 5 write signal
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Summary of Contents for UPD789026 Series
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