Configuration 1: Stand-alone
1. Connect a USB-C cable to J1:A.
2. Connect the other end of the USB cable to a USB2.0/USB3.x port.
3. LED1:A and D3 on the controlCARD will illuminate.
Configuration 2: External 5-V supply
1. Insert the TMDSCNCD280039C controlCARD into a TMDSHSECDOCK, or other compatible docking
station.
2. Connect a USB-B "mini" connector to J17 on the TMDSHSECDOCK.
3. Flip S1 to the "USB-ON" position. The controlCARD will automatically switch to the external 5-V supply.
4. LED1:A and D3 on the controlCARD will illuminate.
Note
The TMDSCNCD280039C controlCARD automatically switches to the external 5-V supply when
present. No additional configuration is required.
3 Errata
Current revision of controlCARD as of 5/3/2021: PCB rev - E1, ASSY rev - none.
3.1 Warnings, Notes, and Errata
The TMDSCNCD280039C evaluation kit ships with a USB cable and is designed to be powered via USB.
However, in extreme cases, the board/controlCARD may require more power than the 5 V @ 500 mA (USB
3.0 - 900 mA) that a computer’s USB port can provide. This is especially true when additional circuitry has
been added to the TMDSHSECDOCK. In such cases, it is recommended to use an external 5-V power supply
(2.5-mm inner diameter x 5.5-mm outer diameter) and plug it into J1 on the TMDSHSECDOCK. A compatible
supply is:
• Phihong PSAC05R-050(P)-R-C2 + Phihong RPBAG
5-V power suppy instabilty may lead to device resets
The 5-V rail on the TMDSCNCD280039C controlCARD can be powered from an on-board USB connector or
from a baseboard like the TMDSHSECDOCK. A switch device on the controlCARD automatically selects the 5-V
input power source for the controlCARD without the need for user configuration.
A loss of power or glitching on the baseboard 5-V power source can cause the automatic switch to disconnect
from both power sources for several milliseconds. This momentary loss of power may cause a brownout
condition on the MCU, triggering a device reset. To avoid this condition, ensure that the baseboard power supply
remains at 0 V or 5 V during code execution.
3.2 Warnings About Specific controlCARD Revisions
MCU100E1
• TP4 is incorrectly labeled as 5V5 on the front side of the controlCARD. TP4 corresponds to device ground
(GND).
• TP1 is incorrectly labeled as device ground (GND) on the front side of the controlCARD. TP1 corresponds to
the HSEC 5.0-V input.
• The TPD6E05U06RVZR ESD protection devices (U5, U6, U7, and U8) are not populated on the
controlCARD. Take the necessary precautions to protect the ADC channels on the controlCARD from ESD
and overvoltage damage.
• See warning above about power supply stability
MCU100A
• See warning above about power supply stability
Errata
SPRUIZ4B – MAY 2021 – REVISED JUNE 2022
TMS320F280039C controlCARD Information Guide
3
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