Table of Contents
Advertisement
Errata
3 Errata
3.1 Warnings, Notes, and Errata
External power supply is needed when power requirements exceed USB limits
The F2800137 evaluation kit ships with a USB cable and is designed to be powered by way of USB. However,
in extreme cases the board/controlCARD can require more power than the 5 V @ 500 mA (USB 3.0 - 900 mA)
that a computer 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 the power supply into J1 on the TMDSHSECDOCK. A compatible
supply such as:
•
CUI SMM6-5-K-P6 + SMI-US-5
5-V power supply instability can 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 can cause a brownout
condition on the MCU, triggering a device reset. To avoid this condition, make sure that the baseboard power
supply remains at 0 V or 5 V during code execution.
3.2 Warnings About Specific controlCARD Revisions
Issue
5-V power supply instability can
lead to device resets
Issue
Incorrect label on TP1
5-V power supply instability can
lead to device resets
EVM for software development
only
4
TMDSCNCD2800137 controlCARD Information Guide
Table 3-1. MCU102A
Description
See
Section 3.1
about power supply instability.
Table 3-2. MCU102E1
Description
TP1 is incorrectly labeled as 5V5 on the front side of the controlCARD PCB. TP1 corresponds to the
HSEC_5V0 rail on the board.
See
Section 3.1
about power supply instability.
This EVM is for software development only and is meant to be used only with the TMDSHSECDOCK.
Copyright © 2022 Texas Instruments Incorporated
SPRUJ15B – NOVEMBER 2021 – REVISED OCTOBER 2022
Submit Document Feedback
www.ti.com
Advertisement
Table of Contents
