2.5
DIP Switches
2.6
Onboard Status Output
2.6.1
LEDs
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Circuit and Operational Description
The DIP switch ramp on the board has the following control possibilities:
Table 1. DIP Switches Functional Descriptions
DIPs
[XXXXXX]
Functional Description
[123456]
1
Reserved. Set to zero.
2
Reserved. Set to zero.
3
Reserved. Set to zero.
4
Nyquist band selector [0 = first Nyquist band, 1 = second Nyquist band]
5
Switch for raw or post-processed interleaved output.
[0 = raw interleaved data, 1 = post-processed data]
6
ADC power down. [0 = ADC Power down, 1 = ADC Power on].
Table 2. DIP Switches Modes
DIPs
Example of Configurations
[XXXXXX]
(X is undefined. 0 is down, towards the numbers of the DIP ramp)
[123456]
[000X01]
The output from the ADS-ADX EVM is raw interleaved data.
[000011]
The output from the ADS-ADX EVM is the post-processed interleaved data.
The signal is reconstructed for the first Nyquist band.
[000111]
The output from the ADS-ADX EVM is the post-processed interleaved data.
The signal is reconstructed for the second Nyquist band.
Four LEDs are on the board. A more thorough description on the signal requirements for estimation is
available in the data sheet for the ADX IP-core.
Table 3. LED Functions
LED
Color
Description
D4
Green
On – Channel mismatch has been estimated and outputs are valid to specification.
Off – Channel mismatch is not estimated, output may be outside specification.
Blink (together with D2) – Clock is not stable or not connected
D3
Green
On – A valid calibration signal is available and the post-processing tracks the channel mismatch.
Off – A valid calibration signal is not available and the post-processing is locked to last estimated channel
mismatch.
Blink (together with D1) – Clock is not stable or not connected
D2
Red
On – License checked and is OK.
Off – License not yet checked.
Slow blink – License time expired. Reset manually to renew.
Fast blink – License error.
D1
Red
On – New available dataset is stored in internal memory.
Off – No new dataset is available.
(This LED will blink when in continuous acquisition mode).
SLAU247 – August 2008
ADS5474 ADX Evaluation Board for Interleaving
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