ADI ADSP-2191

ADSP-2191 Allgemeine Beschreibung

GENERAL DESCRIPTIONThe ADSP-2191M DSP is a single-chip microcomputer optimized for digital signal processing (DSP) and other high speed numeric processing applications.The ADSP-2191M combines the ADSP-219x family base architecture (three computational units, two data address gener ators, and a program sequencer) with three serial ports, two SPI-compatible ports, one UART port, a DMA controller, three programmable timers, general-purpose Programmable Flag pins, extensive interrupt capabilities, and on-chip program and data memory spaces.The ADSP-2191M architecture is code-compatible with DSPs of the ADSP-218x family. Although the architectures are compatible, the ADSP-2191M architecture has a number of enhancements over the ADSP-218x architecture. The enhance ments to computational units, data address generators, and program sequencer make the ADSP-2191M more flexible and even easier to program.PERFORMANCE FEATURES   6.25 ns Instruction Cycle Time, for up to 160 MIPS Sustained Performance   ADSP-218x Family Code Compatible with the Same Easy to Use Algebraic Syntax   Single-Cycle Instruction Execution   Single-Cycle Context Switch between Two Sets of Computation and Memory Instructions   Instruction Cache Allows Dual Operand Fetches in Every Instruction Cycle   Multifunction Instructions   Pipelined Architecture Supports Efficient Code Execution   Architectural Enhancements for Compiled C and C++ Code Efficiency   Architectural Enhancements beyond ADSP-218x Family   are Supported with Instruction Set Extensions for Added Registers, and Peripherals   Flexible Power Management with User-Selectable Power-Down and Idle ModesINTEGRATION FEATURES   160 K Bytes On-Chip RAM Configured as 32K Words 24-Bit Memory RAM and 32K Words 16-Bit Memory RAM   Dual-Purpose 24-Bit Memory for Both Instruction and Data Storage   Independent ALU, Multiplier/Accumulator, and Barrel      Shifter Computational Units with Dual 40-bit Accumulators   Unified Memory Space Allows Flexible Address Generation, Using Two Independent DAG Units   Powerful Program Sequencer Provides Zero-Overhead   Looping and Conditional Instruction Execution   Enhanced Interrupt Controller Enables Programming of Interrupt Priorities and Nesting ModesSYSTEM INTERFACE FEATURES   Host Port with DMA Capability for Glueless 8- or 16-Bit Host Interface   16-Bit External Memory Interface for up to 16M Words of Addressable Memory Space   Three Full-Duplex Multichannel Serial Ports, with      Support for H.100 and up to 128 TDM Channels with      A-Law and μ-Law Companding Optimized for Telecom      munications Systems   Two SPI-Compatible Ports with DMA Support   UART Port with DMA Support   16 General-Purpose I/O Pins with Integrated Interrupt Support   Three Programmable Interval Timers with PWM      Generation, PWM Capture/Pulsewidth Measurement,      and External Event Counter Capabilities   Up to 11 DMA Channels Can Be Active at Any Given Time for High I/O Throughput   On-Chip Boot ROM for Automatic Booting from External   8- or 16-Bit Host Device, SPI ROM, or UART with Autobaud Detection   Programmable PLL Supports 1x to 32x Input Frequency   Multiplication and Can Be Altered during Runtime      IEEE JTAG Standard 1149.1 Test Access Port Supports   On-Chip Emulation and System Debugging 2.5 V Internal Operation and 3.3 V I/O   144-Lead LQFP and 144-Ball Mini-BGA Packages

Funktionen

• 6.25 ns Instruction Cycle Time (Internal), for up to
• 160 MIPS Sustained Performance
• ADSP-218x Family Code Compatible with the Same
• Easy -to-Use Algebraic Syntax
• Single-Cycle Instruction Execution
• Up to 16M words of Addressable Memory Space with
• 24 Bits of Addressing Width
• Dual Purpose Program Memory for Both Instruction and
• Data Storage
• Fully Transparent Instruction Cache Allows Dual
• Operand Fetches in Every Instruction Cycle
• Unified Memory Space Permits Flexible Address
• Generation, Using Two Independent DAG Units
• Independent ALU, Multiplier/Accumulator, and Barrel
• Shifter Computational Units with Dual 40-bit Accumulators
• Single-Cycle Context Switch between Two Sets of Computational and DAG Registers
• Parallel Execution of Computation and Memory Instructions
• Pipelined Architecture Supports Efficient Code
• Execution at Speeds up to 160 MIPS
• Register File Computations with All Nonconditional,
• Nonparallel Computational Instructions
• Powerful Program Sequencer Provides Zero-Overhead
• Looping and Conditional Instruction Execution
• Architectural Enhancements for Compiled C Code Efficiency
• ADSP-2191 DSP FEATURES
• 64K Words of On-Chip RAM, Configured as 32K Words
• On-Chip 24-bit RAM and 32K Words On-Chip
• 16-bit RAM
• Architecture Enhancements beyond ADSP-218x Family
• are Supported with Instruction Set Extensions for
• Added Registers, Ports, and Peripherals
• Flexible Power Management with Selectable
• Power-Down and Idle Modes
• Programmable PLL Supports 1x to 32x Frequency
• Multiplication, Enabling Full-Speed Operation from
• Low-Speed Input Clocks
• 2.5 V Internal Operation Supports 3.3 V Compliant I/O
• Three Full-Duplex Multichannel Serial Ports, Each
• Supporting H.100 Standard with A-Law and μ-Law
• Companding in Hardware
• Two SPI-Compatible Ports with DMA Capability
• One UART Port with DMA Capability
• 16 General-Purpose I/O Pins (Eight Dedicated/Eight
• Programmable from the External Memory Interface)
• with Integrated Interrupt Support
• Three Programmable 32-Bit Interval Timers with
• Pulsewidth Counter, PWM Generation, and Externally
• Clocked Timer Capabilities
• Up to 11 DMA Channels can be Active at any Given Time
• Host Port With DMA Capability for Efficient, Glueless Host
• Interface (16-Bit Transfers)
• External Memory Interface Features Include:
• Direct Access from the DSP to External Memory for
• Data and Instructions.
• Support for DMA Block Transfers to/from
• External Memory.
• Separate Peripheral Memory Space with Parallel
• Support for 224K External 16-Bit Registers.
• Four General-Purpose Memory Select Signals that
• Provide Access to Separate Banks of External
• Memory. Bank Boundaries and Size Are User
• Programmable.
• Programmable Waitstate Logic with ACK Signal and
• Separate Read and Write Wait Counts. Wait Mode
• Completion Supports All Combinations of ACK
• and/or Wait Count.
• I/O Clock Rate Can Be Set to the Peripheral Clock Rate
• Divided by 1, 2, 4, 16, or 32 to Allow Interface to Slow
• Memory Devices.
• Address Translation and Data Word Packing is Provided
• to Support an 8- or 16-Bit External Data Bus.
• Programmable Read and Write Strobe Polarity.
• Separate Configuration Registers for the Four
• General-Purpose, Peripheral, and Boot
• Memory Spaces.
• Bus Request and Grant Signals Support the Use of the
• External Bus by an External Device.
• Boot Methods Include Booting Through External Memory
• Interface, SPI Ports, UART Port, or Host Interface
• IEEE JTAG Standard 1149.1 Test Access Port Supports
• On-Chip Emulation and System Debugging
• 144-Lead LQFP Package (20 x 20 x 1.4 mm) and 144-Lead
• Mini-BGA Package (10 x 10 x 1.25 mm)