CHAPTER 4 PORT FUNCTIONS
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User’s Manual U11302EJ4V0UM
Figure 4-2. Block Diagram of P00 and P04
Figure 4-3. Block Diagram of P01 to P03
PUO: Pull-up resistor option register
PM:
Port mode register
RD:
Port 0 read signal
WR:
Port 0 write signal
P00/INTP0/TI0,
P04/XT1
RD
Internal bus
P-ch
WR
PM
WR
PORT
RD
WR
PUO
V
DD
P01/INTP1,
P02/INTP2,
P03/INTP3
Selector
PUO0
Output latch
(P01 to P03)
PM01 to PM03
Internal bus