LC723781N/723782N/723783N/723784/723785
No.8011-8/14
Pin Description
Pin name
Pin No.
I/O
Pin explanation
Equivalent circuit
PA0
PA1
PA2
PA3
32
31
30
29
I
Dedicated input ports.
These ports are designed with a low threshold voltage.
Input is disabled in Backup mode.
PB0
PB1
PB2
PB3
28
27
26
25
I/O
General-purpose I/O ports.
The mode (input or output) is set using the IOS2 instruction.
Input is disabled and the pins go to the high-impedance state in
Backup mode.
These ports are set up as general-purpose input ports after a power
on reset.
PC0
PC1
PC2
PC3
24
23
22
21
I/O
General-purpose I/O ports (middle-voltage input and output).
The mode (input or output) is set using the IOS2 instruction.
External pull-up resistors are required since the output circuits are
open drain.
Input is disabled and the pins go to the high-impedance state in
Backup mode.
These ports are set up as general-purpose input ports after a power
on reset.
PD0/INT4
PD1/INT5
PD2
PD3
20
19
18
17
I/O
General-purpose I/O and external interrupt shared function ports.
The input formats are Schmitt inputs.
The external interrupt function is enabled when the external interrupt
enable flag is set.
When used as general-purpose I/O ports :
The mode (input or output) is set in 1-bit units using the IOS2
instruction.
When used as external interrupt pins :
The external interrupt functions are enabled by setting the
corresponding external interrupt enable flag (INT4EN or INT5EN).
In this case, the pins must be set to input mode in advance.
Input is disabled and the pins go to the high-impedance state in
Backup mode.
These ports are set up as general-purpose input ports after a power
on reset.
Continued on next page.