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Errata
3 Errata
3.1 Warnings, Notes, and Errata
External power supply is needed when power requirements exceed USB limits.
The F28P65X Experimenter's Kit ships with a USB cable and is designed to be powered via USB. However, in
extreme cases, the board/controlCARD can require more power than the 5 V at 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 docking
station. In such cases, TI recommends to use an external 5 V power supply (2.5 mm inner diameter x 5.5 mm
outer diameter) and plug into J1. 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 TMDSCNCD28P65X 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 BAW oscillator.
The TMDSCNCD28P65X controlCARD supports the use of the CAN boot mode. This boot mode can be
selected through switch S3. The CAN boot mode requires the use of an on-board 25 MHz BAW oscillator Y2 to
clock the F28P65x device. See
SCI Boot Option.
By default, in Boot-from-SCI mode, the MCU expects GPIO12 and GPIO13 to be the IO pins responsible for
sending the program to the device. But, on this controlCARD GPIO28 and GPIO29 are used for Boot from SCI.
These GPIOs are connected to the isolated USB-to-serial interface via the XDS110 emulator.
3.2 Warnings About Specific controlCARD Revisions
Issue
5-V power supply instability can lead to
device resets
Issue
USB-C data peripheral signals connected
incorrectly to MCU
5-V power supply instability can lead to
device resets
4
TMDSCNCD28P65X controlCARD Information Guide
Section 6
for more information on the S3 Switch.
Table 3-1. MCU114A
Description
See
Section 3.1
about power supply instability.
Table 3-2. MCU114E2
Description
USB-C data peripheral signals (GPIO42 & GPIO43) are connected to U1 incorrectly.
Remove R80 and R81, then switch the traces using blue wire.
Fix: None.
See
Section 3.1
about power supply instability.
Copyright © 2023 Texas Instruments Incorporated
SPRUJ90A – MARCH 2023 – REVISED JULY 2023
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