QuickStart Rev A vs Rev B?

David Betz

Does anyone know the difference between QuickStart Rev A and Rev B? I have four QuickStart boards and three are Rev A and one is Rev B. It looks like the circuitry around the FTDI chip is different as is the chip itself. Are there any functional differences between these two revisions or should they be interchangable?

Edit: One interesting difference is that the Rev A is labeled "P8X32A QuickStart" and the Rev B is labeled "Propeller QuickStart".

Bean

David,
I know the original quickstarts only had a 32K eeprom. Now they have a 64K eeprom.

Bean

David Betz

Bean wrote: »

David,
I know the original quickstarts only had a 32K eeprom. Now they have a 64K eeprom.

Bean

I don't think they changed the revision from A to B when they added the 64K EEPROM because I have two QuickStart boards that are labeled Rev A that have 64K EEPROMs and the part number on the EEPROM chip is the same as on my new Rev B board.

Tor

My Rev. A versions have 64K EEPROM. I would guess that there was an original version with 32K, and then the first revision arrived.. which would be Rev. A, and maybe that's when the 64K arrived. I have one Rev. B QS and, as with David's my Rev. B says 'Propeller QuickStart' instead of 'P8X32A QuickStart'. The changes do seem to be around the FTDI. And the Rev. B on mine has some golden transparent plastic on the top of the USB socket, the Rev. A doesn't.

-Tor

prof_braino

Wasn't the Rev B about the magic resistor? I think it was the 100k pull up from Tx to 3.3v to address the intermittent "prop not found" error on some quickstarts on some PC's? I think this issue was also addressed in the update from prop tool 1.2 to 1.3.2, but might be confusing myself again.