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參數(shù)資料
| 型號： | ADSP-2195MBST-140X |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 數(shù)字信號處理 |
| 英文描述： | DSP Microcomputer |
| 中文描述： | 16-BIT, 160 MHz, OTHER DSP, PQFP144 |
| 封裝： | METRIC, PLASTIC, LQFP-144 |
| 文件頁數(shù)： | 16/68頁 |
| 文件大小： | 951K |
| 代理商： | ADSP-2195MBST-140X |
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For current information contact Analog Devices at 800/262-5643
ADSP-2195
Bus Request and Bus Grant
The ADSP-2195 can relinquish control of the data and
address buses to an external device. When the external
device requires access to the bus, it asserts the bus request
(BR) signal. The (BR) signal is arbitrated with core and
peripheral requests. External Bus requests have the lowest
priority. If no other internal request is pending, the external
bus request will be granted. Due to synchronizer and arbi-
tration delays, bus grants will be provided with a minimum
of three peripheral clock delays. The ADSP-2195 will
respond to the bus grant by:
Three-stating the data and address buses and the MS3–0,
BMS, IOMS, RD, and WR output drivers.
Asserting the bus grant (BG) signal.
The ADSP-2195 will halt program execution if the bus is
granted to an external device and an instruction fetch or
data read/write request is made to external general-purpose
or peripheral memory spaces. If an instruction requires two
external memory read accesses, the bus will not be granted
between the two accesses. If an instruction requires an
external memory read and an external memory write access,
the bus may be granted between the two accesses. The
external memory interface can be configured so that the
core will have exclusive use of the interface. DMA and Bus
Requests will be granted. When the external device releases
BR, the DSP releases BG and continues program execution
from the point at which it stopped.
The bus request feature operates at all times, even while the
DSP is booting and RESET is active.
The ADSP-2195 asserts the BGH pin when it is ready to
start another external port access, but is held off because
the bus was previously granted. This mechanism can be
extended to define more complex arbitration protocols for
implementing more elaborate multimaster systems.
September 2001
This information applies to a product under development. Its characteristics and specifications are subject to change with-
out notice. Analog Devices assumes no obligation regarding future manufacturing unless otherwise agreed to in writing.
16
REV. PrA
Instruction Set Description
The ADSP-2195 assembly language instruction set has an
algebraic syntax that was designed for ease of coding and
readability. The assembly language, which takes full
advantage of the processor’s unique architecture, offers the
following benefits:
ADSP-219x assembly language syntax is a superset of and
source-code-compatible (except for two data registers
and DAG base address registers) with ADSP-218x family
syntax. It may be necessary to restructure ADSP-218x
programs to accommodate the ADSP-2195’s unified
memory space and to conform to its interrupt vector map.
The algebraic syntax eliminates the need to remember
cryptic assembler mnemonics. For example, a typical
arithmetic add instruction, such as AR = AX0 + AY0,
resembles a simple equation.
Every instruction, but two, assembles into a single, 24-bit
word that can execute in a single instruction cycle. The
exceptions are two dual word instructions. One writes 16-
or 24-bit immediate data to memory, and the other is an
absolute jump/call with the 24-bit address specified in the
instruction.
Multifunction instructions allow parallel execution of an
arithmetic, MAC, or shift instruction with up to two
fetches or one write to processor memory space during a
single instruction cycle.
Program flow instructions support a wider variety of con-
ditional and unconditional jumps/calls and a larger set of
conditions on which to base execution of conditional
instructions.
Development Tools
The ADSP-2195 is supported with a complete set of
software and hardware development tools, including Analog
Devices’ emulators and VisualDSP++ development envi-
ronment. The same emulator hardware that supports other
ADSP-219x DSPs, also fully emulates the ADSP-2195.
The VisualDSP++ project management environment lets
programmers develop and debug an application. This envi-
ronment includes an easy-to-use assembler that is based on
an algebraic syntax; an archiver (librarian/library builder),
a linker, a loader, a cycle-accurate instruction-level simula-
tor, a C/C++ compiler, and a C/C++ run-time library that
includes DSP and mathematical functions. Two key points
for these tools are:
Compiled ADSP-219x C/C++ code efficiency—the
compiler has been developed for efficient translation of
C/C++ code to ADSP-219x assembly. The DSP has
architectural features that improve the efficiency of
compiled C/C++ code.
ADSP-218x family code compatibility—The assembler
has legacy features to ease the conversion of existing
ADSP-218x applications to the ADSP-219x.
Debugging both C/C++ and assembly programs with the
VisualDSP++ debugger, programmers can:
View mixed C/C++ and assembly code (interleaved
source and object information)
Insert break points
Set conditional breakpoints on registers, memory, and
stacks
Trace instruction execution
Perform linear or statistical profiling of program
execution
Fill, dump, and graphically plot the contents of memory
Source level debugging
Create custom debugger windows
The VisualDSP++ IDE lets programmers define and
manage DSP software development. Its dialog boxes and
property pages let programmers configure and manage all
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ADSP-2195 | LM2991 Negative Low Dropout Adjustable Regulator; Package: CERDIP; No of Pins: 16; Qty per Container: 25; Container: Rail |
| ADSP-2195MBCA-140X | LM2991 Negative Low Dropout Adjustable Regulator; Package: CERDIP; No of Pins: 16; Container: Rail |
| ADSP-2195MKST-160X | LM2991 Negative Low Dropout Adjustable Regulator; Package: TO-263; No of Pins: 5; Qty per Container: 45; Container: Rail |
| ADSP-2196 | DSP Microcomputer |
| ADSP-2196MBCA-140X | DSP Microcomputer |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADSP-2195MKCA-160 | 制造商:Analog Devices 功能描述:DSP Fixed-Point 24-Bit 160MHz 160MIPS 144-Pin CSP-BGA 制造商:Rochester Electronics LLC 功能描述:16-BIT,160 MIPS, 2.5V, 80KBYTES RAM - Bulk |
| ADSP-2195MKST-160 | 制造商:Analog Devices 功能描述:DSP Fixed-Point 24-Bit 160MHz 160MIPS 144-Pin LQFP 制造商:Analog Devices 功能描述:IC MICROCOMPUTER 16-BIT |
| adsp-2196mbca-140 | 制造商:Analog Devices 功能描述: |
| adsp-2196mbst-140 | 制造商:Analog Devices 功能描述:DSP Fixed-Point 16-Bit 140MHz 140MIPS 144-Pin LQFP 制造商:Rochester Electronics LLC 功能描述: |
| ADSP-2196MBST-140Z | 制造商:Analog Devices 功能描述:DSP Fixed-Point 16-Bit 140MHz 140MIPS 144-Pin LQFP |
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