Intel® Server Board SE7520JR2

Functional Architecture

3.4.10.2Serial Ports

The baseboard provides two serial ports: an external RJ45 Serial B port, and an internal DH10 Serial A header. The following sub-sections provide details on the use of the serial ports.

3.4.10.2.1Serial Port A

Serial A is an optional port, accessed through a 9-pin internal DH-10 header. A standard DH10 to DB9 cable is used to direct Serial A out the back of a given chassis. The Serial A interface follows the standard RS232 pin-out as defined in the following table.

Table 14: Serial A Header Pin-out

Pin

Signal Name

Serial Port A Header Pin-out

1

DCD

 

 

 

 

 

 

 

 

 

 

 

2

DSR

 

 

 

 

 

 

 

 

3

RX

 

 

 

 

 

 

 

 

4

RTS

 

 

 

 

 

 

 

 

5

TX

 

 

 

 

 

 

 

 

6

CTS

 

 

 

 

 

 

 

 

7

DTR

 

 

 

 

 

 

 

 

8

RI

 

 

 

 

 

 

 

 

9

GND

 

 

 

 

 

 

 

 

 

 

 

3.4.10.2.2Serial Port B

Serial B is an external 8-pin RJ45 connector that is located on the back edge of the baseboard. For serial devices that require a DB-9 connector, an appropriate RJ45-to-DB9 adapter is necessary.

3.4.10.2.3Serial Port Multiplexer Logic

The Server Board SE7520JR2 has a multiplexer to connect the rear RJ45 connector to either Serial Port A or Serial Port B. This facilitates the routing of Serial Port A to the rear RJ45 connector if Serial Port B is used for Serial Over LAN (SOL). This serial port selection can be done through the BIOS setup option.

The figure below shows the serial port mux functionality.

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C78844-002