AMB-2020HT(T)-E User’s Manual
16
SW3: CPU Voltage Selector
CPU
Voltage
SW3
Short Jumpers
CPU
Voltage
SW3
Short Jumpers
CPU
Voltage
SW3
Short Jumpers
1.3V
9-10
2.1V
1-2
2.9V
1-2, 7-8
1.4V
3-4, 9-10
2.2V
3-4
3.0V
3-4, 7-8
1.5V
5-6, 9-10
2.3V
1-2, 3-4
3.1V
1-2, 3-4, 7-8
1.6V
3-4, 5-6, 9-10
2.4V
5-6
3.2V
5-6, 7-8
1.7V
7-8, 9-10
2.5V
1-2, 5-6
3.3V
1-2, 5-6, 7-8
1.8V
3-4, 7-8, 9-10
2.6V
2-4, 5-6
3.4V
3-4, 5-6, 7-8
1.9V
5-6, 7-8, 9-10
2.7V
3-4, 5-6
3.5V
1-2, 3-4, 5-6, 7-8
2.0V
All Open
2.8V
1-2, 3-4, 5-6
JP10: RS232/422/485 (COM2-J6) Selection
COM1 is fixed for RS-232 use only.
COM2 is selectable for RS232, RS-422 and RS-485.
The following table describes the connectors’ jumper settings.
COM2
Function
RS-232
RS-422
RS-485
Jumper
Setting
(pin closed)
all
jumpers
open
1-2
3-4
5-6
7-8
11-12
15-16
17-18
19-20
23-24
1-2
3-4
5-6
7-8
9-10
11-12
13-14
15-16
17-18
19-20
21-22
Jumper
Illustration