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參數資料
| 型號： | ADSP-2181KS-160 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 數字信號處理 |
| 英文描述： | DSP Microcomputer |
| 中文描述： | 24-BIT, 20 MHz, OTHER DSP, PQFP128 |
| 封裝： | PLASTIC, QFP-128 |
| 文件頁數： | 7/32頁 |
| 文件大小： | 290K |
| 代理商： | ADSP-2181KS-160 |
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ADSP-2181
–7–
REV. D
T able II.
PMOVLAY
Memory
A13
A12:0
0
Internal
Not Applicable
Not Applicable
1
External
Overlay 1
0
13 LSBs of Address
Between 0x2000
and 0x3FFF
2
External
Overlay 2
1
13 LSBs of Address
Between 0x2000
and 0x3FFF
T his organization provides for two external 8K overlay segments
using only the normal 14 address bits. T his allows for simple
program overlays using one of the two external segments in
place of the on-chip memory. Care must be taken in using this
overlay space in that the processor core (i.e., the sequencer)
does not take into account the PMOVLAY register value. For
example, if a loop operation was occurring on one of the exter-
nal overlays and the program changes to another external over-
lay or internal memory, an incorrect loop operation could occur.
In addition, care must be taken in interrupt service routines as
the overlay registers are not automatically saved and restored on
the processor mode stack.
For ADSP-2100 Family compatibility, MMAP = 1 is allowed.
In this mode, booting is disabled and overlay memory is dis-
abled (PMOVLAY must be 0). Figure 5 shows the memory map
in this configuration.
INTERNAL 8K
(PMOVLAY = 0,
MMAP = 1)
0x3FFF
0x2000
0x1FFF
8K EXTERNAL
0x0000
PROGRAM MEMORY
ADDRESS
Figure 5. Program Memory (MMAP = 1)
Data Memory
T he ADSP-2181 has 16,352 16-bit words of internal data
memory. In addition, the ADSP-2181 allows the use of 8K
external memory overlays. Figure 6 shows the organization of
the data memory.
8K INTERNAL
(DMOVLAY = 0)
OR
EXTERNAL 8K
(DMOVLAY = 1, 2)
INTERNAL
8160 WORDS
DATA MEMORY
ADDRESS
32 MEMORY–
MAPPED REGISTERS
0x3FFF
0x3FEO
0x3FDF
0x2000
0x1FFF
0x0000
Figure 6. Data Memory
Memory Architecture
T he ADSP-2181 provides a variety of memory and peripheral
interface options. T he key functional groups are Program
Memory, Data Memory, Byte Memory and I/O.
Program Memory
is a 24-bit-wide space for storing both
instruction opcodes and data. T he ADSP-2181 has 16K words
of Program Memory RAM on chip and the capability of access-
ing up to two 8K external memory overlay spaces using the
external data bus. Both an instruction opcode and a data value
can be read from on-chip program memory in a single cycle.
Data Memory
is a 16-bit-wide space used for the storage of
data variables and for memory-mapped control registers. T he
ADSP-2181 has 16K words on Data Memory RAM on chip,
consisting of 16,352 user-accessible locations and 32 memory-
mapped registers. Support also exists for up to two 8K external
memory overlay spaces through the external data bus.
Byte Memory
provides access to an 8-bit wide memory space
through the Byte DMA (BDMA) port. T he Byte Memory inter-
face provides access to 4 MBytes of memory by utilizing eight
data lines as additional address lines. T his gives the BDMA Port
an effective 22-bit address range. On power-up, the DSP can
automatically load bootstrap code from byte memory.
I/O Space
allows access to 2048 locations of 16-bit-wide data.
It is intended to be used to communicate with parallel periph-
eral devices such as data converters and external registers or
latches.
Program Memory
T he ADSP-2181 contains a 16K
×
24 on-chip program RAM.
T he on-chip program memory is designed to allow up to two
accesses each cycle so that all operations can complete in a
single cycle. In addition, the ADSP-2181 allows the use of 8K
external memory overlays.
T he program memory space organization is controlled by the
MMAP pin and the PMOVLAY register. Normally, the ADSP-
2181 is configured with MMAP = 0 and program memory orga-
nized as shown in Figure 4.
8K INTERNAL
(PMOVLAY = 0,
MMAP = 0)
OR
EXTERNAL 8K
(PMOVLAY = 1 or 2,
MMAP = 0)
0x3FFF
0x2000
0x1FFF
8K INTERNAL
0x0000
PROGRAM MEMORY
ADDRESS
Figure 4. Program Memory (MMAP = 0)
T here are 16K words of memory accessible internally when the
PMOVLAY register is set to 0. When PMOVLAY is set to
something other than 0, external accesses occur at addresses
0x2000 through 0x3FFF. T he external address is generated as
shown in T able II.
相關PDF資料 |
PDF描述 |
|---|---|
| ADSP-2181KST-115 | DSP Microcomputer |
| ADSP-2181KST-133 | DSP Microcomputer |
| ADSP-2181KST-160 | DSP Microcomputer |
| ADSP-2181 | ADSP-2100 Family DSP Microcomputers |
| ADSP-2181BST-115 | DSP Microcomputer |
相關代理商/技術參數 |
參數描述 |
|---|---|
| ADSP-2181KST-115 | 制造商:Analog Devices 功能描述:DSP Fixed-Point 16-Bit 28.8MHz 28.8MIPS 128-Pin LQFP 制造商:Rochester Electronics LLC 功能描述:DSP W/LARGE RAM, 28.8MIPS C GRDE, TQFP - Bulk |
| ADSP-2181KST-133 | 制造商:Analog Devices 功能描述:DSP Fixed-Point 16-Bit 33.3MHz 33.3MIPS 128-Pin LQFP 制造商:Rochester Electronics LLC 功能描述:DSP W/LARGE RAM, 33MIPS C GRDE, TQFP - Bulk 制造商:Analog Devices 功能描述:Digital Signal Processor IC Supply Volta |
| ADSP2181KST-133 | 制造商:Analog Devices 功能描述: |
| ADSP-2181KST-160 | 制造商:Analog Devices 功能描述:DSP Fixed-Point 16-Bit 40MHz 40MIPS 128-Pin LQFP 制造商:Analog Devices 功能描述:IC MICROCOMPUTER DSP |
| ADSP-2181KST-160R | 制造商:Analog Devices 功能描述:DSP Fixed-Point 16-Bit 40MHz 40MIPS 128-Pin LQFP T/R |
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