CHAPTER 4 PORT FUNCTIONS
Preliminary User’s Manual U19014EJ1V0UD
68
Figure 4-8. Block Diagram of P15
P15
WR
PU
WR
PORT
WR
PM
PU15
PM15
EV
DD
P-ch
PU1
PM1
RD
P1
Selector
Output latch
(P15)
Internal bus
P1:
Port register 1
PU1:
Pull-up resistor option register 1
PM1:
Port mode register 1
RD: Read
signal
WR
××
: Write
signal
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