SUPER MICRO Computer MIIC-203 manual DB-25 Serial Port Pinout, +5VDC Power Jack

DB-25 Serial Port Pinout

DB-25 Pin 2, Transmit Data from the Host Computer to the iPort

DB-25 Pin 3, Receive Data from the iPort to the Host Computer.

DB-25 Pin 4, Request to Send from the Host Computer to iPort.

DB-25 Pin 5, Clear to Send from the iPort to the Host Computer.

DB-25 Pin 7, Ground between Host Computer and iPort

DB-9 Serial Port Pinout

DB-9 Pin 3, Transmit Data from the Host Computer to the iPort

DB-9 Pin 2, Receive Data from the iPort to the Host Computer.

DB-9 Pin 7, Request to Send from the Host Computer to iPort.

DB-9 Pin 8, Clear to Send from the iPort to the Host Computer.

DB-9 Pin 5, Ground between Host Computer and iPort

Transmit Data, Receive Data, and Ground are required in all cases. Request to Send and Clear to Send are required if RTS/CTS communication handshaking protocol is selected. See the iPort/AFM Flow Control command.

Communication Handshaking Protocol

iPort/AFM implements either XON/XOFF (by default) or RTS/CTS flow control protocols. Either protocol can be selected with the iPort/AFM Flow Control command. Flow control is used by the iPort/AFM to limit character flow to and from the Host computer to avoid overflowing internal communication buffers and lost data.

Communication Parameters

19,200, 57.6k, or 115.2k Baud, No Parity, 8 Data Bits, 1 Stop Bit

The default baud rate is 19,200 until the iPort/AFM receives a Baud Change command from the host computer.

2. +5VDC Power Jack

The iPort/AFM Host Adapter can be powered in one of two ways, from the power jack, or from the I2C interface connector. If the unit is powered from the provided +5VDC Wall Transformer, approximately 250ma of regulated +5VDC is available at the I2C interface connector to power external devices. If the iPort/AFM is powered from the I2C connector, the unit requires 50ma of regulated +5VDC.

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