Codec Change

Well, it turns out that cheap isn’t always good. We chose to change the audio codec on the board because it required that we generate three external clocks to feed into it. This used an unjustifiable amount of board resources and also would have required us to change the crystal for the main processor which would have made it harder to implement ethernet in the future. For this reason, the UDA1345TS is out and we have settled on an AC97 codec from analog devices. The new part number is AD1981BL. This codec also has mic and headphone preamps built into it.

Move to BF537

Major Design Change! We moved to the BF537 part. It is compatible with all components of the curent design but adds features such as 802.3 MAC, CAN, TWI (I2C) along with more timers and GPIO. It will also make interfacing with the audio codec easier. My part generator cranked almost a second to spit out the 208 pin part, but it’s done and I am progressing on schematic capture.