User guide

IMBA-9454G Motherboard
Page 86
The COM2 Mode Selection jumper sets the communication protocol used by the second
serial communications port (COM 2) as RS-232, RS-422 or RS-485. The COM2 Mode
Selection settings are shown in Table 5-4.
Pins Description
Short 1-3 RS-232 Default
Short 3-5 RS-422/485
Table 5-4: COM2 Mode Selection Jumper Settings
Figure 5-11: COM2 Mode Selection Jumper Location
5.4.4 SPI Flash Connector
Jumper Label:
JSPI1
Jumper Type:
8-pin header
Jumper Settings:
See Table 5-4
The 8-pin SPI Flash
connector is used to flash the BIOS.
Pin No. Description Pin No. Description
1 SPI_VCC 2 GND
3 SPI_CS 4 SPI_CLK
5 SPI_SO 6 SPI_SI
7 NC 8 NC
Table 5-5: SPI Flash Jumper Settings