Some of the components on the Colibri PXA270 module are End Of Life. Toradex will update the module to HW Version 2.
Here some additional information.
We tried to keep the customer impact as small as possible. In most cases a SW update will make the Colibri 100% compatible. However, there are some cases which may required small HW changes on the base board.
Some customer reported problem with the new Colibri PXA270 V2.x. The module didn't boot. This was due to low decoupling capacity on the main 3.3V and/or the VCC_BATT domain. They added additional 150uF to 300uF capacitors. The module was booting afterwards without any problems. Please take a look at our EvalBoard schematics. The main decoupling capacitors for the 3.3V domain are on the page called Power Supply DCDC.
|9,10,11,12||Analog power supply pins||No changes should be required. However, make sure you connected them even if you don't use the audio codec.|
|14,16,18,20||Touch signals||Other registry settings may be required to use the Touch Screen.|
|2,4,6,8||Analog inputs||**Maximal Voltage changed**. New max voltage: channel 0,1, and 3: 3.3V. Channel 2: 5V. 7.5V is out of the absolute maximum ratings and will destroy the audio codec. New 12bit resolution.|
|13,15,17||Headphone pins||Different default volume. Small difference in amplifier characteristic. New 18bit resolution.|
|5,7||LineIn signals||Small difference in characteristic. Maybe volume needs to be adjusted. New 18bit resolution.|
|1,3||Microphone signals||With the UCB1400 it was possible to switch the MIC_GND. We added an external circuit to switch the MIC_GND also on the WM9715. You can connect the MIC_GND with the AVSS_AUDIO if you enable the MICBIAS. New 18bit resolution.|
The new audio codec makes it possible to interface a 5-wire touch.
For more details please refer to the Wolfson WM9715L datasheet:
In order to support the new PXA270 V2.Xx modules, customers using Windows CE need to upgrade their Toradex Win CE Image to version 3.7 or newer, which provides support for the new Flash memory and audio codec devices. Versions 3.5 / 3.6 provide some support, but touch is not working.