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CHAPTER 5 PORT FUNCTIONS
User’s Manual U12697EJ3V0UM
Figure 5-2. Block Diagram of P00 to P05
PU: Pull-up resistor option register
PM: Port mode register
RD: Port 0 read signal
WR: Port 0 write signal
P-ch
WR
PM
WR
PORT
RD
WR
PU
V
DD
Selector
Alternate
function
PU00 to PU05
Output latch
(P00 to P05)
PM00 to PM05
Internal bus
P00/INTP0,
P01/INTP1,
P02/INTP2/NMI to
P05/INTP5