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CHAPTER 4 PORT FUNCTIONS
User’s Manual U19780EJ2V0UD
98
Figure 4-11. Block Diagram of P31
WR
PU
RD
WR
PORT
WR
PM
PU31
PM31
V
DD
P-ch
PM3
PU3
P3
P31/INTP5/OCD1A (/SCK10)
Internal bus
Selector
Output latch
(P31)
Alternate
function
Alternate
function
Figure 4-12. Block Diagram of P32
P32/INTP4/OCD1B (/SI10)
WR
PU
RD
WR
PORT
WR
PM
PU32
PM32
V
DD
P-ch
PU3
PM3
P3
Internal bus
Selector
Alternate
function
Output latch
(P32)
P3:
Port register 3
PU3:
Pull-up resistor option register 3
PM3:
Port mode register 3
RD: Read
signal
WR
××
: Write
signal
Remark
The functions of pins whose names are in parentheses can be used by setting bit 2 (ISC2) of the input
switch control register (ISC) to 1.