CSPI stands for Configurable Serial Peripheral Interface. This synchronous serial communication that can have its settings changed by a program.
On the AD7011-EVA, it is used for connections to AD (4 channel), DA (4 channel), and ZigBee (optional).
One feature of the CSPI is that it can be directly controlled from the i.MX31 CPU.
Applicable versions: 01.00.00, 002, and 003