Hi,
My AD9854 chip is not responding .
I communicated using the SPI protocol.
My crystal is 100MHz (ASEM1-100.000MHZ-LC-T from Abracon LLC)
But i think im not getting the crystal frequency to the AD9854, when i tried to probe it. My crystal might be damaged during the time of soldering.
1) So if the crystal is not working fine can i communicate with the SPI communication?
2)When i roamed around the link in EngineerZone AD9854 SPI programming , in the question part the questioner used the parallel port D5 ----> SDIO_Buffer_enable. What is meant by the SDIO Buffer enable he meant here? i'm confused with the question.(He is also used SPI)
I would like to use the chip AD9854 and AD9912 for a long period and i haven't get any responds from both the chips.
If the chip is up then i can use the same for many projects and products that we are planning to use.
Regards
ArunKuttath
The AD9854 reference clock (i.e. your crystal) and the SPI interface are not related. You should be able to communicate to the part through the SPI interface even if the part does not have a reference clock. Double check that you are communicating to the part in the right SPI mode (looks to be mode 0) and try reading back the Control Register (0x7) as it's one of the few registers that does not default to all zeros.
The SDIO_Buffer_Enable likely refers to a logic buffer or buffers that are populated on the AD9854 evaluation board. With the buffer enabled it will try to drive the pins of the AD9854. If you then try to send your own signals to the part there may be bus contention.