Newport XPS-D, Руководство для стартапов

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XPS-D Controller Start-Up Manual
6.0 Appendix B: General I/O Description
This chapter briefly describes all XPS signal types and details each of the XPS
connector interfaces.
6.1 Digital I/O (GPIO3, GPIO5, GPIO6)
All extended digital I/Os are TTL compatible:
• All digital I/Os are not isolated, but are referenced to electrical ground (GND).
•
Input levels must be between 0 V and +5 V or 0 V and +12 V.
• All digital inputs are identical, except for GPIO5.DI_15 and GPIO5.DI_16
(synchronization inputs) that have no internal pull-up
• Output levels should be at least +5 V (up to 30 V absolute maximum rating with
open collector outputs).
• Outputs must be pulled up to the user’s external power supply (+5 V to +24 V). This
external power supply must be referenced to the XPS ground (GND).
All digital I/Os are refreshed asynchronously on user requests. Therefore, digital inputs
or outputs have no refresh rate.
Typical delay is 100
μ s due to the clock cycle and priorities made to other functions.
All digital inputs are in negative logic and have in5 V or +12 V pull up resistors,
except for the synchronization inputs, GPIO5.DI_15 and GPIO5.DI_16, that have no
internal pull-up resistors (available for the Extended GPIO).
6.1.1 Digital Inputs
Parameter Symbol Min. Max. Units
Low-Level Input Voltage V
IL
0 0.8 V
High-Level Input Voltage V
IH
1.6 5 V
Input Current LOW I
IL
– -2.5 mA
Input Current HIGH I
IH
– 0.4 mA
Figure 20: Digital TTL input.
GPIOn (n = 3, 5 or 6) inputs can be accessed via the GPIODigitalGet(GPIOn.DI, …)
function.
GPIO5 Synchronization Inputs
Synchronization Input 1: GPIO or External Trigger Input.
Synchronization Input 2: GPIO or Slave Controller Clock Input.
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