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3.1. About the programmer’s model

The base address of the PrimeCell GPIO is not fixed, and can be different for any particular system implementation. However, the offset of any particular register from the base address is fixed.The following locations are reserved and must not be used during normal operation:

  • locations at offsets 0x424 to 0xFCC are reserved for possible future extensions and test purposes

  • locations at offsets +0xFDO to +0xFDC are reserved for future ID expansion.

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