102
•
Technical Specifications
Xtium-CL MX4 User's Manual
Note 2: General Outputs /Strobe Output Specifications
Each of the eight General Outputs are TTL (3.3V) compatible. General Output 1 and 2 also function
as the Strobe Output 1 and 2 respectively controlled by Sapera strobe control functions. See
“Board Information” user settings. The following figure is typical for each General Output.
75
Ω
Buffer
LVTTL
To User
Interface
Connector
3.3V
Output
Enable
EMI
Filter
Figure 31: General Outputs Electrical Diagram
Output Details:
•
Each output has a 75-ohm series resistor
•
The 2 diodes protects the LVTTL buffer against overvoltage
•
Each output is a tri-state driver, enabled by software
•
Minimum guaranteed output current is +/- 24mA @ 3.3V
•
Maximum output current is 50mA
•
Maximum short circuit output current is 44mA
•
Minimum voltage for output level high is 2.4V, while maximum voltage for output low is 0.55V
•
Maximum output switching frequency is limited by driver and register access on the PCIe bus.
For Strobe Usage:
•
Refer to Sapera Strobe Methods parameters:
CORACQ_PRM_STROBE_ENABLE
CORACQ_PRM_STROBE_POLARITY
CORACQ_PRM_STROBE_LEVEL
CORACQ_PRM_STROBE_METHOD
CORACQ_PRM_STROBE_DELAY
CORACQ_PRM_STROBE_DURATION
•
See also *.cvi file entries:
Strobe Enable, Strobe Polarity, Strobe Level, Strobe Method, Strobe Delay, Strobe Duration.
