The
WLR089 Xplained Pro Evaluation kit automatically detects
the availability of power sources based on the following priority:
- External power
- Embedded debugger USB
- Target USB
The following table lists the details of the available power supply sources.
Table 1. Power Sources for WLR089 Xplained
Pro Evaluation Board
Power Input |
Voltage Requirements |
Current Requirements |
Pin Name |
External power |
- 5V ±2% (±100 mV)
for the USB host operation
- 4.3V to 5.5V, if
the USB host operation is not required
|
Recommendation:
- Requires a
minimum current of 1A, which provides enough current for the
connected USB devices and the board
- The maximum
current can go up to 2A due to the input protection maximum
current specification
|
PWR |
Embedded debugger USB |
4.4V to 5.25V (according to the USB spec.) |
500 mA (according to the USB 2.0 spec.) |
EDBG USB |
Target USB |
4.4V to 5.25V (according to the USB spec.) |
500 mA (according to the USB 2.0 spec.) |
TARGET USB |
Info: Use
an external power supply when 500 mA from a USB connector is not enough to power the
board with possible extension boards. A connected USB device in a USB host
application may easily exceed this limit.