CM312 Datasheet, PDF (16/56 Pages) List of Unclassifed Manufacturers – Communications utilityModule

Descriptions
The following table describes the functions of the jumpers.
Jumper
JP 1
Table 2 Switch and Jumper tables
Use
IRQ selection for COM1
G setting: jumper installed = 1K pull down resistor for the selected IRQ
Jumper removed = no pull down for the selected IRQ
Default: 3-4, IRQ4 is selected for CN3 with G jumper installed (1K pull-down)
JP 2
IRQ selection for COM2
G setting: jumper installed = 1K pull down resistor for the selected IRQ
Jumper removed = no pull down for the selected IRQ
Default: 1-2, IRQ3 is selected for CN4 with G jumper installed (1K pull-down)
JP3
IRQ selection for COM3
G setting: jumper installed = 1K pull down resistor for the selected IRQ
Jumper removed = no pull down for the selected IRQ
Default: 5-6, IRQ5 is selected for CN5 with G jumper installed (1K pull-down)
JP 4
IRQ selection for COM4
G setting: jumper installed = 1K pull down resistor for the selected IRQ
Jumper removed = no pull down for the selected IRQ
Default: 13-14, IRQ10 is selected for CN6
With G jumper installed (1K pull-down)
JP5
Input clock selection for serial ports
1-2 = select 24 MHz input clock to UART
2-3 = select 24 MHz / 13 input clock to UART
Default: 2-3 jumped, to select 1.8432 MHz to UART
JP6
Ethernet EEPROM enable
1-2 installed = Factory use
1-2 open = Normal Operation
Default: 1-2 open to enable normal Ethernet EEPROM operation
JP7
Reserved, leave open
1-2 installed = Not allowed
1-2 open = Normal operation
Default: 1-2 always open
CM312 Quad Serial utilityModule
6
RTD Embedded Technologies, Inc.