Intel SE7221BK1-E manual Super I/O, Serial Ports

SE7221BK1-E Technical Product Specification

4.2Super I/O

National Semiconductor* PC87427Super IO device contains all of the necessary circuitry to control two serial ports, one parallel port, floppy disk, PS/2-compatible keyboard and mouse and hardware monitor controller. The baseboard implements the following features:

ƒGPIOs

ƒTwo serial ports

ƒFloppy

ƒKeyboard and mouse

ƒLocal hardware monitoring

ƒWake up control

ƒSystem Health Support

4.2.1Serial Ports

The board provides two serial ports, an external serial port, and an internal serial header. The following sections provide details on the use of the serial ports.

4.2.1.1Serial A

Serial A is a standard DB9 interface located at the rear I/O panel of the server board, below the video connector. Serial A is designated by as “Serial A” on the silkscreen. The reference designator is J8A1.

4.2.1.2Serial B

Serial B is an optional port, accessed through a 9-pin internal header (J1B1). A standard DH-10 to DB9 cable can be used to direct serial B to an external connector on any given chassis. The serial B interface follows the standard RS232 pin-out. The baseboard has a “Serial_B” silkscreen label next to the connector and is located beside the PCI32 5V connector.

4.2.1.3Floppy Disk Controller

The floppy disk controller (FDC) in the Super IO is functionally compatible with floppy disk controllers in the DP8473 and N844077. All FDC functions are integrated into the Super IO including analog data separator and 16-byte FIFO. The baseboard provides a standard 34-pin interface for the floppy disk controller.

4.2.1.4Keyboard and Mouse

Two external PS/2 ports, located on the back of the baseboard, are provided to access the keyboard or mouse functions.

4.2.1.5Fast X-Bus extension for boot flash, memory and I/O.

The fast X-bus Supports I/O and memory read/write operations and 8 bit data bus, 28-bit addressing.

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