GETTING STARTED
picasso
TM
cPCI-LS
User Manual
- 11 -
1.3.4
LVDS General Purpose Input/Output
On the AIA-connector there are some RS-644 or RS-422 signals which have a general purpose
function. In Table 1 the pinout of the AIA connector in MODE0 and MODE1 is given.
In MODE0 the following signals are general purpose input: PSTRB1, LEN1, FEN1 and SDI.
In MODE1 only the SDI signal is input. PSTRB1, LEN1 and FEN1 are used for the video timing
of camera B.
SDI can be used as a interrupt input. It can generate a interrupt on the falling or rising-edge.
The general purpose outputs are the following signals EXPO_1, SCL and SDO. EXPO_1 is only
available in MODE0. With the SDI, SDO and SCL signals it is possible to build your own
synchronous serial communication.
When you want the general purpose outputs to be compatible with the TTL signaling level, you need the RS-422
option and use the + output. The + output has a swing of 0V to 5V.
When modified to RS-422 all outputs (EXPO_0, EXPO_1, SDO and SCL) will be RS-422 compatible. It is
possible (but not recommended) to connect a RS-422 output on a RS-644 input.
1.3.5
Isolated General Purpose Input /Output header
The Isolated General Purpose Inputs and Outputs are connected by a 10-pins flat-cable
connector. In Figure 4 you see a close-up of the flat-cable connector. The pin connections are
listed in Table 3.
When you use the general-purpose inputs or outputs you have to connect an external power
supply. The maximum external voltage is 5.5 V. The input current is 10 mA.
ATTENTION: The maximum output current is 100 mA.
The outputs are open drain, which means that logic 1 will force the output to ground. A wiring
example to connect an output is given below.
10
8
6
4
2
9
7
5
3
1
J7
Figure 4: Close-up of the
flat-cable connector
Sub D-9
Pins
Input 0
1
Input 1
2
Output 0
4
Output 1
5
VCC (5V)
6
GND
3,9
Table 3
