2-14
A1SQN/A1SQN-E Motherboard User’s Manual
A1SQN/A1SQN-E 2X10 External I/O Conector
The external I/O connector at JIO1 provides RS485, analog input, and DIO (Digital
Input/Output) connectivity. See the tables below for pin definitions.
A1SQN/A1SQN-E 2X10 External I/O
Pin Definitions
Pin# Definition Pin # Definition
1
RS485A
2
RS485B
3
GND
4
GND
5
DIO1
6
DIO0
7
DIO3
8
DIO2
9
DIO5
10
DIO4
11
DIO7
12
DIO6
13
ADC1
14
ADC0
15
ADC3
16
ADC2
17
ADC5
18
ADC4
19
ADC7/3.3V
20
ADC6/5V
JP5V and JP3V3 Jumpers
JP5V provides 5V output, and JP3V3 provides 3.3V output for the external I/O
connector at JIO1. See the tables below for jumper settings.
JP5V Jumper Settings
A1SQN/ A1SQN-E
Pin# Definition
1-2
JIO1 Pin 20 5V Output
2-3 (Default)
JIO1 Pin 20 ADC6
JP3V3 Jumper Settings
A1SQN/ A1SQN-E
Pin# Definition
1-2
JIO1 Pin 19 3.3V Output
2-3 (Default)
JIO1 Pin 19 ADC7
Note
: Please refer to page 1-3 for the locations of the external I/O connector
JIO1 and jumpers JP5V and JP3V3.
