Crosstalk in AT45DB642 Flash memory
Crosstalk in AT45DB642 Flash memory
(OP)
A capacitive waveform synchronized at the same voltage (3.6V) and frequency of a CS signal (13.5Khz) appears over the SO (Serial Output) signal of the memory. SO is used as a data transmission pin (Rx_Flash) and is connected to a Rabbit 3000 micro controller. CS is also generated by the micro.
I have a ground plane covering both lines on the other side of the PCB and 100K pull ups (3.3V) connected to CS and SI (Serial Input) which is the other data line (Tx_Flash) on the memory.
Any ideas on how to eliminate that kind of interference ?





RE: Crosstalk in AT45DB642 Flash memory
Have you verified that if Vcc is connected correctly to your flash chip? It sound stupid, but it is one of the things that I can think of, for an output that follows the input.
RE: Crosstalk in AT45DB642 Flash memory
There has to be a wiring error of some sort.
TTFN
RE: Crosstalk in AT45DB642 Flash memory