DS752PP7

Copyright 2008 Cirrus Logic

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CS4970x4 Data Sheet

32-bit High Definition Audio Decoder DSP Family

Mode select pins on the CS4970x4 are used to select the boot mode upon the rising edge of reset. A detailed

explanation of termination requirements for each communication mode select pin can be found in the CS4970x4

System Designer’s Guide.

4.3.3 Pads

The CS4970x4 I/O operate from the 3.3 V supply and are 5 V tolerant.

4.4 Application Code Security

The external program code may be encrypted by the programmer to protect any intellectual property it may contain.

A secret, customer-specific key is used to encrypt the program code that is to be stored external to the device.