The improved PSoC architecture will be introduces soon:
Improvements include:
1. New analog and digital blocks
2. Improved routing scheme
3. New user modules
Please visit to http://www.cypressmicro.com soon for following information
and please check application notes list, there are some interesting stuff.
The PSoC uses the reconfigurable blocks, which block is configured by corresponding registers writing. There are analog, digital and mixed signal blocks
Sigma delta ADC is ADC which integrates and converts differences between new and old signal values. The decimator is digital FIR low-pass filter. The FIL coefficients are selected to desired sample rate and clock signal. You can find detail explanation sigma-delta operation on Analog Devices, Crystal and Texas Instruments. I saw very nice coolbook on Analog Dev. site, www.analog.com. Try to search "sigma-delta ADC operation principles".