5
DB-9 Pin 5, Ground between Host Computer and iPort
iPort Power
The I
2
C adapter requires 50ma of REG5 volt power. This power can be
supplied in one of two ways:
• Via the power jack.
If the I
2
C adapter is powered via its +5VDC power jack, and the adapter is
operating in power SOURCE mode, excess power is available via the +V wire in
the I
2
C connector to power external devices.
• Via the I
2
C interface connector.
If 50ma of reg5V power is available in the target system, and the adapter
is operating in power SOURCE mode, the I
2
C adapter can be powered via the +V
wire in I
2
C interface connector.
I
2
C Mini Interface Connector
The iPort/AI 2 I
2
C Bus host adapter includes a five wire (1x5) 2.54 mm (.100"),
positive locking, shrouded header receptacle connector (see Appendix A) for
interfacing to an external I
2
C Bus. Interface lines provided include:
• I
2
C Clock (SCL)
• I
2
C Data (SDA)
• /INT (Not Used)
• Ground
• +V (optional)
Minimum wiring for I
2
C Bus communications include I
2
C Bus Clock, Data, and
Ground. Use of the +V wire in the I
2
C Interface connector are user optional.
NOTE: See the Hardware Configuration section below for additional information
on configuring the I
2
C Bus interface.
