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ADSP-2187LBST-160 Datasheet(PDF) 9 Page - Analog Devices |
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ADSP-2187LBST-160 Datasheet(HTML) 9 Page - Analog Devices |
9 / 32 page ADSP-2187L –9– REV. 0 ACCESSIBLE WHEN PMOVLAY = 2 ACCESSIBLE WHEN PMOVLAY = 1 ACCESSIBLE WHEN PMOVLAY = 5 ALWAYS ACCESSIBLE AT ADDRESS 0 0000 – 0 1FFF ACCESSIBLE WHEN PMOVLAY = 0 ACCESSIBLE WHEN PMOVLAY = 4 INTERNAL MEMORY EXTERNAL MEMORY 0 2000– 0 3FFF 0 2000– 0 3FFF 0 2000– 0 3FFF 0 2000– 0 3FFF2 0 2000– 0 3FFF2 PM (MODE B = 0) 8K INTERNAL PMOVLAY = 0 8K EXTERNAL PROGRAM MEMORY MODE B = 1 ADDRESS 0 3FFF 0 2000 0 1FFF 0 0000 8K INTERNAL PMOVLAY = 0, 4, 5 OR 8K EXTERNAL PMOVLAY = 1, 2 0 3FFF 0 2000 0 1FFF 8K INTERNAL 0 0000 PROGRAM MEMORY MODE B = 0 ADDRESS ACCESSIBLE WHEN PMOVLAY = 1 RESERVED RESERVED INTERNAL MEMORY EXTERNAL MEMORY 0 2000– 0 3FFF 0 0000– 0 1FFF2 PM (MODE B = 1)1 RESERVED 1WHEN MODE B = 1, PMOVLAY MUST BE SET TO 0 2SEE TABLE III FOR PMOVLAY BITS ACCESSIBLE WHEN PMOVLAY = 0 RESERVED Figure 4. Program Memory Program Memory (Host Mode) allows access to all internal memory. External overlay access is limited by a single external address line (A0). External program execution is not available in host mode due to a restricted data bus that is 16-bits wide only. Table III. PMOVLAY Bits PMOVLAY Memory A13 A12:0 0, 4, 5 Internal Not Applicable Not Applicable 1 External 0 13 LSBs of Address Overlay 1 Between 0x2000 and 0x3FFF 2 External 1 13 LSBs of Address Overlay 2 Between 0x2000 and 0x3FFF DATA MEMORY Data Memory (Full Memory Mode) is a 16-bit-wide space used for the storage of data variables and for memory-mapped control registers. The ADSP-2187L has 32K words on Data Memory RAM on chip, consisting of 16,352 user-accessible lo- cations and 32 memory-mapped registers. Support also exists for up to two 8K external memory overlay spaces through the external data bus. All internal accesses complete in one cycle. Accesses to external memory are timed using the wait states specified by the DWAIT register. ACCESSIBLE WHEN DMOVLAY = 2 ACCESSIBLE WHEN DMOVLAY = 1 ACCESSIBLE WHEN DMOVLAY = 5 32 MEMORY MAPPED REGISTERS 0 3FFF 0 2000 0 1FFF INTERNAL 8160 WORDS 0 0000 DATA MEMORY ADDRESS ALWAYS ACCESSIBLE AT ADDRESS 0 2000 – 0 3FFF ACCESSIBLE WHEN DMOVLAY = 0 ACCESSIBLE WHEN DMOVLAY = 4 INTERNAL MEMORY EXTERNAL MEMORY 0 2000– 0 1FFF 0 0000– 0 1FFF 0 0000– 0 1FFF 0 0000– 0 1FFF 0 0000– 0 1FFF DATA MEMORY 8K INTERNAL DMOVLAY = 0, 4, 5 OR EXTERNAL 8K DMOVLAY = 1, 2 0 3FE0 0 3FDF Figure 5. Data Memory Map Data Memory (Host Mode) allows access to all internal memory. External overlay access is limited by a single external address line (A0). The DMOVLAY bits are defined in Table IV. Table IV. DMOVLAY Bits DMOVLAY Memory A13 A12:0 0, 4, 5 Internal Not Applicable Not Applicable 1 External 0 13 LSBs of Address Overlay 1 Between 0x2000 and 0x3FFF 2 External 1 13 LSBs of Address Overlay 2 Between 0x2000 and 0x3FFF |
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