
CHAPTER 2 PIN FUNCTIONS
User’s Manual U19780EJ2V0UD
40
2.2.7 P70 to P75 (port 7)
P70 to P75 function as an I/O port. These pins also function as key interrupt input pins.
78K0/KB2-A 78K0/KC2-A
P70/KR0
P71/KR1
P72/KR2
P73/KR3
P74/KR4
−
P75/KR5
The following operation modes can be specified in 1-bit units.
(1) Port
mode
P70 to P75 function as an I/O port. P70 to P75 can be set to input or output port in 1-bit units using port mode
register 7 (PM7). Use of an on-chip pull-up resistor can be specified by pull-up resistor option register 7 (PU7).
(2) Control
mode
P70 to P75 function as key interrupt input pins.
(a) KR0 to KR5
These are the key interrupt input pins.
2.2.8 P80 to P83 (port 8)
P80 to P83 function as an I/O port. These pins also function as A/D converter reference analog input and
operational amplifier I/O.
78K0/KB2-A 78K0/KC2-A
P80/ANI8/AMP2
−
P81/ANI9/AMP2OUT
P82/ANI10/AMP2+
P83/ANI11
The following operation modes can be specified in 1-bit units.
(1) Port
mode
P80 to P83 function as an I/O port. P80 to P83 can be set to input or output port in 1-bit units using port mode
register 8 (PM8). 8
(2) Control
mode
P80 to P83 function as A/D converter reference analog input and operational amplifier I/O.