Intel S5000XAL manual Super I/O, Serial Ports, Serial a Header Pin-out

Functional Architecture Intel® Server Board S5000PAL / S5000XAL TPS

3.5Super I/O

Legacy I/O support is provided by using a National Semiconductor* PC87427 Super I/O device. This chip contains all of the necessary circuitry to support the following functions:

•GPIOs

•Two serial ports

•Keyboard and mouse support

•Wake up control

•System health support

3.5.1.1Serial Ports

The server board provides two serial ports: an external RJ45 serial port, and an internal DH10 serial header.

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

	Table 8. 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

The rear RJ45 Serial B port is a fully functional serial port that can support any standard serial device. Using an RJ45 connector for a serial port allows direct support for serial port concentrators, which typically use RJ45 connectors and are widely used in the high-density server market. For server applications that use a serial concentrator to access the system management features of the server board, a standard 8-pin CAT-5 cable from the serial concentrator is plugged directly into the rear RJ45 serial port.

To allow support for either of two serial port configuration standards, a jumper block located directly behind the rear RJ45 serial port must be configured appropriately according to the desired standard. For serial concentrators that require a DCD signal, the jumper block must be configured with the serial port jumper over pins 1 and 2. For serial concentrators that require a DSR signal (Default), the jumper block must be configured with the serial port jumper over pins 3 and 4. Pin 1 on the jumper is identified by “*”.

Note: By default, the rear RJ45 serial port is configured to support a DSR signal. This configuration is compatible with the Cisco* standard.

40Revision 1.4

Intel order number: D31979-007