1 EV42J24A R3 Changes
The changes to the R3 version of the board are relatively minor and were made to improve the usability of the board. The functionality of the board has not changed. The contents of the kit have not changed.
Identifying the Kit Version
The easiest way to identify the kit is by looking at the first row of the label on the board. The format of the label is shown in the image below. The ASSY# will be consistent between the revisions and is equal to 02-00854. The REV will be 02 for the R2 revision of the board and 03 for the R3 revision.
| Change | Reason |
|---|---|
| 1) Rotated DediProg Header J61 180 Degrees | Improved connectivity with DediProg Programmer |
| 2) Changed J14 from Trace-Link jumper to regular jumper | Simplifies switching power from 3.3V to 1.8V for VTR2 and the MEC1723 |
| 3) Changed J47 to Bypass jumper from shorting resistor | Simplifies putting the CEC173x into and out of Bypass mode |
| 4) Changed J44 shorting resistor to jumper | Simplifies holding the MEC1723 in Reset if desired |
| 5) Added .1 uF capacitor C51 to GPIO250/SPI0PER_nCS line | Improves performance when connecting to an external FTDI device |
| 6) Added .1 uF capacitor C52 to GPIO024/SPI1PER_nCS line | Improves performance when connecting to an external FTDI device |