There is plenty of electronics theory I don't know yet... Power Supply is definately a weak-ness for me.
But, the SPI SD Card reader attached to the flashrom is given 5v, and is supposed to have a regulator on board, that drops that to 3.3v. They also typically have a logic level converter on them that must be powered by 3.3v that comes from the onboard voltage regulator. I have read that this 3.3v regulator is very important. It is said that SD Card readers do not work well with resister based voltage dividers.
All of my testing of the 32k card have been with the FlashROM99. But 90% of that with the power coming off of the sideport itself.
There are two varieties of my 32k card out there.
- Rev 2 boards, have a jumper wire on the back, and an 74LS245 with Alliance 62256 SRAM chips. These use about 65ma.
- Rev 3 boards, no jumper, it has been revised into the pcboard layout, and 74HCT245 with Cypress 62256 SRAM. These use about 25ms.
AuTomato? and Greg? Is there a commonality there too? Are you both having trouble when combined with a Rev 2 32k board?