Errata; Warnings, Notes, And Errata; Warnings About Specific Controlcard Revisions; Table 3-1. Mcu106A - Texas Instruments TMDSCNCD2800157 Information Manual

Errata

3 Errata

3.1 Warnings, Notes, and Errata

External power supply is needed when power requirements exceed USB limits
The F2800157 evaluation kit ships with a USB cable and is designed to be powered using 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'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 the power supply into J1 on the TMDSHSECDOCK. A compatible
power supply is:
• CUI SMM6-5-K-P6 + SMI-US-5
5-V power supply instability can lead to device resets
The 5-V rail on the TMDSCNCD2800157 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.
CAN boot mode requires use of on-board crystal
The TMDSCNCD2800157 controlCARD supports the use of the CAN boot mode. This boot mode can be
selected through switch S4. The CAN boot mode requires the use of an external crystal to clock the F2800157
device. Therefore, when using the CAN boot mode, the controlCARD must be configured to use the on-board
crystal Y1 by setting switch S3 accordingly. See

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
4 TMDSCNCD2800157 controlCARD Information Guide
Section 6

Table 3-1. MCU106A

Table 3-2. MCU106E1

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. TP1 can be labeled 5V0.
See Section 3.1 about power supply instability.
Copyright © 2023 Texas Instruments Incorporated
for more information on the S3 and S4 switches.
Description
See Section 3.1 about power supply instability.
SPRUJ29A – APRIL 2022 – REVISED JANUARY 2023
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