CHAPTER 12 PORT FUNCTIONS
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User’s Manual U15195EJ5V0UD
12.3 Pin Functions of Each Port
12.3.1 Port 0
Port 0 is a 6-bit input-only port in which all pins are fixed to input.
7
−
P0
6
−
5
P05
4
P04
3
P03
2
P02
1
P01
0
P00
Address
FFFFF400H
After reset
Undefined
Besides functioning as an input port, in control mode, it can also operate as the timer/counter output stop signal
input, external interrupt request input, A/D converter (ADC) external trigger input, and timer 3 output stop signal input.
Although this port is also used as NMI, ESO0/INTP0, ESO1/INTP1, ADTRG0/INTP2, ADTRG1/INTP3, and
INTP4/TO3OFF, these functions cannot be switched with input port functions. The status of each pin is read by
reading the port.
(1) Operation in control mode
Port
Alternate Pin Name
Remarks
Block Type
P00
NMI
Non-maskable interrupt request input
P01 ESO0/INTP0
P02 ESO1/INTP1
Timer/counter output stop signal input or external
interrupt request input
P03 ADTRG0/INTP2
P04 ADTRG1/INTP3
A/D converter (ADC) external trigger input or external
interrupt request input
Port 0
P05
INTP4/TO3OFF
External interrupt request input/timer 3 output stop
signal input
E
Содержание PD703114
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