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2.2 Hardware Setup
This section describes the overall system setup for the EVM. A computer runs the software that provides an
interface to the AFE539A4EVM through the on-board controller.
The USB connection generates 5-V of power for use as the DAC supply voltage (VDD). The on-board controller
supplies 3.3-V of power for the input/output (IO) signals from the controller. These IO signals are level translated
to the VDD voltage of the DAC.
EVM
2.2.1 Electrostatic Discharge Caution
Many of the components on the AFE539A4EVM are susceptible to damage by electrostatic
discharge (ESD). Observe proper ESD handling precautions when unpacking and handling the
EVM, including the use of a grounded wrist strap at an approved ESD workstation.
2.2.2 Power Configurations and Jumper Settings
The AFE539A4EVM provides electrical connections to the device supply pins. The connections are shown in
Table
2-3.
AFE539A4EVM
Supply Name
Connector
J2.1
VDD
J1.1
GND
The jumper settings on the AFE539A4EVM are crucial to the proper operation of the EVM. Table provides the
details of the configurable jumper settings on the EVM. The AFE539A4EVM pin numbers are defined in
2-4.
Jumper
Default Position
Closed: 5-V USB supply connected to
J3
DAC VDD
2
J5
2-3: I
C enabled
J6
Closed: GPIOs enabled
If an external supply is applied to the AFE VDD pin, then remove jumper J3 to disconnect the 5-V USB supply
from the DAC VDD pin.
GPIO2 from the on-board controller is connected to the AFE GPIO pin of the AFE539A4EVM. This input can be
controlled through the graphical user interface (GUI). If the AFE GPIO is configured as an output, remove J6 to
disable the GPIOs from the on-board controller.
GPIO3 from the onboard controller is broken out to J1, pin 8 and is controlled through the GUI using the controls
for GPIO3.
To enable the GPIO pins, close jumper J6. To disable the GPIO pins, remove jumper J6.
SLAU913 – AUGUST 2023
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Figure 2-2
displays the system hardware setup.
Jumpers
Figure 2-2. Hardware Setup
CAUTION
Table 2-3. AFE539A4EVM Power Supply Inputs
1.8 V to 5.5 V (5 V available from the USB); remove J3 if applying an external VDD to the AFE.
0 V
Table 2-4. AFE539A4EVM Jumper Settings
Open: 5-V USB supply disconnected from DAC VDD
1-2: SPI enabled
Open: GPIOs disabled
Copyright © 2023 Texas Instruments Incorporated
USB Port
Voltage Range
Available Option
Hardware
Table
Description
External or on-board VDD selection
2
I
C or SPI selection
Controller GPIO enable
AFE539A4 Evaluation Module
5
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