Hi, I am trying to find R34 and R35 on the physical Au Board, they are both 4.7k ohm resistors but I can’t seem to find them by doing continuity testing (I might accidently be skipping them I don’t know). I want to know because I want to solder some wires to both those resistors. If you could provide a picture with them circled or be specific as possible when describing where they are and what they look like that would be appreciated.
Here’s a shot of the board design as if looking at it from the back. R34 and R35 are circled in red and R34 is on the left.
The bottom of each resistor is 3.3V and the top is the signal.
PROGRAM_B is broken out to the bank D connector so you don’t have to solder to R35.
What is your use case for needing INIT_B?
Ah thanks, I am measuring 3.8k ohms at those resistors so that must be why I couldn’t find them. My use case for needing INIT_B is delaying the FPGA power-on so I can guarantee that the Flash powers on first before the FPGA.
You can delay the FPGA from starting by holding DONE (also broken out) low. DONE is intended to synchronize multiple FPGA’s start times. You can tie them all together and each FPGA pulls it down as long as it isn’t configured. Once configured it’ll release it then wait for it to go high.
Are you talking about waiting for the flash on the board or your own flash? The flash on the board is guaranteed to be on before the FPGA since that’s where it gets its configuration data.