MCC MIIC-203 Guía de usuario descargar pdf (Pagina 10)

Hardware Configuration

Pull-up Resistors

The

iPort Host Adapter includes a slide switch used to enable or

disable internal I

C Bus 1.8K ohm Pull-Up resistors. Every I

C Bus

system must have at least one Pull-Up on the SCL and SDA lines.

Use this switch to configure the iPort appropriately for your

system.

Connecting to a 3.3v System

1. Shut off iPort internal pull-ups. (See Pull-up Resistor section)

2. Use external pull-ups to 3.3 volts.

The iPort uses a 5 volt device. 3.3v is high enough for the iPort to

see a Logical 1.

Connecting to an SMBus System

1. Shut off iPort internal pull-ups. (See Pull-up Resistor section)

2. Use external SMBus rated (approx. 15k ohm) pull-up resistors.

Hardware Set-Up

1.Attach your iPort(#MIIC-201) to an open ComPort on your

computer. If your ComPort has a DB9 connector, use DB-9F to

DB-25M Serial Port Adapter Cable included with your iPort to

connect.

2.Connect the power supply provided or see Interconnect Section

+5VDC Power Jack.

3.Connect I

C/ACCESS.bus Cable to iPort and your I

C device. If

your device does not have the matching connector(#15830064)

you can cut the end of the cable and attach the individual wires to

your device or you can purchase our clip-lead cable (#CABCL).

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MCC MIIC-203 Guía de usuario Pagina 10