P120 (Port 12); P130 (Port 13); P140 (Port 14); Av Ref - NEC 78K0/KD1 Series User Manual

(1) Port mode
P70 to P77 function as an 8-bit I/O port. P70 to P77 can be set to input or output 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 P77 function as key interrupt input pins.

2.2.7 P120 (port 12)

P120 functions as a 1-bit I/O port. This pin also functions as a pin for external interrupt request input.
The following operation modes can be specified.
(1) Port mode
P120 functions as a 1-bit I/O port. P120 can be set to input or output using port mode register 12 (PM12). Use of
an on-chip pull-up resistor can be specified by pull-up resistor option register 12 (PU12).
(2) Control mode
P120 functions as an external interrupt request input pin (INTP0) for which the valid edge (rising edge, falling
edge, or both rising and falling edges) can be specified.

2.2.8 P130 (port 13)

P130 functions as a 1-bit output-only port.

2.2.9 P140 (port 14)

P140 functions as a 1-bit I/O port. This pin also functions as a pin for external interrupt request input and clock
output.
The following operation modes can be specified in 1-bit units.
(1) Port mode
P140 functions as a 1-bit I/O port. P140 can be set to input or output in 1-bit units using port mode register 14
(PM14). Use of an on-chip pull-up resistor can be specified by pull-up resistor option register 14 (PU14).
(2) Control mode
P140 functions as external interrupt request input and clock output.
(a) INTP6
This is the external interrupt request input pin for which the valid edge (rising edge, falling edge, or both
rising and falling edges) can be specified.
(b) PCL
This is a clock output pin.
2.2.10 AV
REF
This is the A/D converter reference voltage input pin.
When A/D converter is not used, connect this pin to V
2.2.11 AV
SS
This is the A/D converter ground potential pin. Even when the A/D converter is not used, always use this pin with
the same potential as the EV
CHAPTER 2 PIN FUNCTIONS
pin or V pin.
SS SS
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