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ADSP-2191M memory architecture

Memory space

• The ADSP-2191M has one single memory space, containing both programme memory and data memory.
• A memory location addressed as PM (Programme Memory) is 24-bits wide.
• A memory location addressed as DM (Data Memory) is 16-bits wide.
• Address width = 24-bits (16 M).
• Total of 16 Mwords is accessible, as 256 pages of 64 Kwords.

Internal memory (page 00₁₆):

000016..7FFF16	32 Kwords of 24-bit Programme Memory.
800016..FFFF16	32 Kwords of 16-bit Data Memory.

I/O space

• Address width = 18-bits (256 K).
• Upper 8-bits of an address formed from IOPG register.
• Lower 10-bits of an address formed from immediate date within the instruction.

Last updated 2nd December 2004, Peter Dziwior.