gremlin
Newbie level 5
I don't know if this is the right forum to discuss this. Anyway, I have a question about extension cable for a SDIO card. I have an evaluation board (with SDIO interface) for a 802.11b/g radio that I can insert into the SDIO slot of a laptop. I issue commands from the PC to the radio to send and receive packets.
The problem now is that I need to build a test cable assembly so that I can place the evaluation board a few feet away from the laptop. The clock is at 25MHz max, and the data lines are also relatively high speed and bidirectional. So the cable length and signal integrity are important.
My choices are either building a good shielded cable assembly or using some bidirectional driver chips on both ends (laptop end and evaluation board end). I am not sure about using driver chips because there is no pin in SDIO to indication direction.
Is there anyone out there who has faced with similar problem?
Thanks,
Andy
The problem now is that I need to build a test cable assembly so that I can place the evaluation board a few feet away from the laptop. The clock is at 25MHz max, and the data lines are also relatively high speed and bidirectional. So the cable length and signal integrity are important.
My choices are either building a good shielded cable assembly or using some bidirectional driver chips on both ends (laptop end and evaluation board end). I am not sure about using driver chips because there is no pin in SDIO to indication direction.
Is there anyone out there who has faced with similar problem?
Thanks,
Andy