CHAPTER 4 PORT FUNCTIONS
Preliminary User’s Manual U16898EJ1V0UD
52
Figure 4-7. Block Diagram of P42
P42/TOH1
WR
PU
RD
WR
PORT
WR
PM
PU42
Output latch
(P42)
PM42
Alternate
function
V
DD
P-ch
PM4
PU4
Internal bus
Selector
PU4:
Pull-up resistor option register 4
PM4:
Port mode register 4
RD:
Read signal
WR
××
: Write signal
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