UBW32 v2.4 Board Release Notes- To find the version number of your UBW32 hardware, check in th upper right hand corner of the board (next to J2). For example, this page describes version 2.4, which is represented as v24.
- In this version, the silk screen text was made to fat, which makes the port names extremely hard to read. The next version of the board (v2.5) will have this problem fixed.
- In this version, the silk names for port RE7, RE6, RE5, RE4, RE3 and RE2 were incorrectly labled as F7, F6, F5, F4, F3, and F2 respectively. They are all located in the upper left hand section of the board. (See below.)
- The J1 alternate power connector is not located on the .100" grid. This will not be fixed in future versions, as it is a space based layout constraint.
- The purpose of J6 (USB) is so that you can add your own USB connector if you want. You'd need to do this if you wanted to use an OTG connector, or use a USB A socket (for host functionality), etc.
- If you are going to use the board for USB host functionality, you will need to jumper the "Host" jumper (JP1) and supply the board with 5V into the 5V net, or use the external power connector J1 or J2.
- There is a footprint for a female USB A connector on the bottom of the board. SparkFun now sells this part.Note that you must not try to use USB Host and USB Client at the same time (as there is only one USB engine in the PIC32.)
- Note that even though all of the PIC32's I/O pins are brought out to headers, there are some pins that already have functions - see the schematic for complete details:
- RE0, RE1, RE2 and RE3 are used to control the four LEDs on the
UBW32 - all will be set to outputs when the firmware starts running,
and the USB LED will blink on and off when the UBW32 is connected to
the PC
- RE7 and RE6 are connected to the PRG and USR switches
respectively - both will be set to inputs in the firmware
- RB5 is hardware dedicated to the VBUSON function, and can not
be used as an I/O pin under software control
