Delivery Contents / Technical Data
PHYTEC Messtechnik GmbH 2008 L-720e_0
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2.6
I
2
C Interface
External devices can be polled or controlled via the I²C interface. In
order for this to occur, the external devices must have an I²C interface
operating in Slave mode.
The I²C interface is available at the internal pin header row X300 of
the
Option Port
. It is possible to connect multiple I²C devices to the
bus, but these devices must be distinguished by their device addresses.
Table 5
depicts the pin assignments for the pin header row X300.
X300
Pin
Function
10
I²C Bus: SCL
12
I²C Bus: SDA
15
Ground
Table 4
Connecting the I²C Interface to the Combi Socket
Note:
The maximum cable length is restricted, due to the fact that the I²C
interface is driven by TTL signals. For a connected device, depending
on the configured transmission rate, the maximum cable length is
aprox. 1 - 2 m.
Use cables with sufficient shielding when connecting this device.
Information for adapting the I²C interface into user software can be
found in section 6.2.7, under the functions group „Transmitting Data
via the I²C Interface“.
2.7
Jumper on pin header row X900
If more then one Framegrabber of the same variant are in one system
it is not possible to discern them. Indeed they get different addresses
but it is not possible to know which belong to whom. To solve that
problem you have Jumper on the pin header row X900. You can use
them to give every Framegrabber in one system a different address. So
it is possible to discern them.
