CHAPTER 4 PORT FUNCTIONS
Preliminary User’s Manual U19014EJ1V0UD
74
Figure 4-13. Block Diagram of P120
P120/INTP0
WR
PU
RD
WR
PORT
WR
PM
PU120
Alternate
function
Output latch
(P120)
PM120
EV
DD
P-ch
PU12
PM12
P12
Selector
Internal bus
P12:
Port register 12
PU12:
Pull-up resistor option register 12
PM12: Port mode register 12
RD: Read
signal
WR
××
: Write
signal
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