shows the D1 and D2 indicator LEDs that confirm the presence of the 5-V and 3.3-V supplies from the
AM64x and AM24x EVM (TMDS64GPEVM and TMDS243GPEVM) HSE connectors.
Figure 3-3. D1 and D2 LEDS
3.2 MUX Circuitry
PA007-based precision ADC EVMs share several pins between the parallel and serial modes of operation
depending on how the controller card is configured by the EVM GUI. There are two SN74CBTLV16292VR
digital multiplexer (MUX) devices on the ADC-PHI-PRU-EVM that route the proper signals from the AM64x
and AM243x EVMs (TMDS64GPEVM and TMDS243GPEVM) to communicate with either the parallel or serial
precision ADC EVMs.
shows how the J9 jumper sets the voltage level on the MUX device selection
pins that route the
A
side PRU signals from the HSE connector to either the B1 (parallel) or B2 (serial)
connections on the
B
side. The signal routing to the MUX devices for both parallel and serial communication
modes is provided in the full schematics of
.
Figure 3-4. J9 Selects Between Serial (S) and Parallel (P) Communication With the ADC
ADC-PHI-PRU-EVM Circuitry
6
ADC-PHI-PRU-EVM Evaluation Module
SBAU396 – MAY 2022
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