2
2 Errata
Current revision of controlCARD as of 9-May-2014: PCB R1.1, ASSY rev A (R1.1a)
2.1 Warnings/Notes/Errata
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Notes on all controlCARDs:
1. The F28377D controlCARD supports USB host/device connectivity. However, the micro-
USB port, J8, is not isolated from the board ground. Care should be taken when this
controlCARD is being used in a high power application and this USB port is also being
used. Note that external USB isolation buffers may be required for these types of
applications.
2. The F28377D
Experimenter’s 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 5V @
500mA a computer’s USB port can provide (<0.01% of use cases). This
is especially true when additional circuitry has been added to the Docking Station.
In such cases, it is recommended to use an external 5V power supply (2.5mm inner
diameter x 5.5mm outer diameter) and plug it into J1. A compatible supply could be the:
Phihong
PSAC05R-050(P)-R-C2
+ Phihong
RPBAG
Warnings about R1.0a revision controlCARDs:
3. Among many other changes made, the pinout of the R1.1 F28377D controlCARD is
different from the pinout of the pre-release R1.0a controlCARDs. Please refer to the kit
documentation and schematics when porting code.
Warnings about R1.1 and earlier controlCARDs:
4. The F28377D MCU is not 5V tolerant. Because of this some additional protection is
needed between the USB port J8 and the MCU. In particular, resistor R72 should
change from 0R0 to 100K and resistor R74 should change from 0R0 to 10K. This will
effectively limit the voltage/current received by the MCU pin. This issue was fixed in
R1.1a and later revision controlCARDs.
5. If used, the crystal X1 should be acceptable in most applications. However, it may fail
under some worst case conditions. To guarantee proper operation, please see the
F28377x Silicon Errata guide. This issue was fixed in R1.1a and later revision
controlCARDs.
6. Several name changes were made to pins on the device and are now reflected in R1.1a
controlCARD documentation. No functionality was affected.
