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CHAPTER 4 PORT FUNCTIONS
Preliminary User’s Manual U16035EJ1V0UM
Figure 4-12. Block Diagram of P74 and P75
RD
P74/PCL,
P75/BUZ
P-ch
WR
PU
WR
PORT
WR
PM
PU74, PU75
PM74, PM75
Selector
V
DD0
Alternate
function
Output latch
(P74, P75)
Internal bus
PU:
Pull-up resistor option register
PM: Port mode register
RD: Port 7 read signal
WR: Port 7 write signal