Flashing the WP34s

[BarryMead]

(11-22-2014 05:46 PM)Elite Wrote:  -Why do I have to remove LB1 and LB2?
-Do you really need to connect both battery terminals?
-Wouldn't it be easier to just connect the board to the JTAG connector as there is GND, Rx0, Tx0, Vcc?

The LB1 and LB2 inductors are removed to allow the USB interface board to intelligently switch between
3.3V power from the FTDI chip and the 3V power supplied by the batteries. Not removing them would cause a conflict between these voltages. When the USB interface board supplies power there is NO-DRAIN on the batteries.

Yes you need to connect both battery terminals or you will only be powering your calculator off of one cell
when the USB cable is not attached.

You could attach the wires to the JTAG connector, but if you ever needed to repair the flash and the
JTAG connector is corrupted then others would not be able to help you with their JTAG equipment.

Hope this helps