3. I2C Interface Connector
The iPort/AFM Host Adapter includes a four wire, positive locking, modular connector (see Appendix A for more info on these parts) for interfacing to an external I2C Bus. Lines provided include I2C Clock (SCL), Data (SDA), Ground, and +5VDC.
Receptacle Connector
An I2C Interface Cable (White=SCL, Red=+5VDC, Green=SDA, Black=Ground) is provided to connect to a external I2C Bus. Since there is no standard I2C Bus connector, you may want to cut off one end of the cable and add a connector compatible with your target system.
Additional I2C Interface Cables (4 ft., 8ft., or 16 ft.) and above mentioned modular connectors are available from MCC. Clip Lead cables are also available. (see Appendix A)
4. INT, Interrupt Signal Control
The iPort/AFM provides an open drain input/output (INT) which can be connected to a corresponding pin on a master or slave. The INT Signal allows the iPort/AFM to participate in INT master and/or slave communications.
___
An interrupt output (INT=low) is generated upon receiving an iNterrupt assert command from the host computer. Resetting and reactivating the interrupt signal is achieved when a release command is received from the host computer or data is read from or written to the iPort/AFM when addressed as an I2C Bus slave.
Interrupt monitoring is enabled upon receiving an enable command from the host computer. Interrupt monitoring causes the iPort/AFM to send notification to the host computer when the INT signal changes state.
12
