DSM2190F4V 可编程系统存储器

The DSM2190F4 is a system memory device for use with the Analog Devices ADSP-2191 DSP. DSM means Digital signal processor System Memory. A DSM device brings In-System Programmable (ISP) Flash memory, parameter storage, programmable logic, and additional I/O to DSP systems. The result is a simple and flexible two-chip solution for DSP designs. DSM devices provide the flexibility of Flash memory and smart JTAG programming techniques for both manufacturing and the field. On-chip integrated memory decode logic makes it easy to map dual banks of Flash memory to the ADSP-2191 in a variety of ways for bootloading, code execution, data recording, code swapping, and parameter storage.

JTAG ISP reduces development time, simplifies manufacturing flow, and lowers the cost of field upgrades. The JTAG ISP interface eliminates the need for sockets and pre-programmed memory and logic devices. For manufacturing, end products may be assembled with a blank DSM device soldered to the circuit board and programmed at the end of the manufacturing line in 10 to 25 seconds with no involvement of the DSP. This allows efficient means to test product and manage inventory by rapidly programming test code, then application code as determined by inventory requirements (Just-In Time inventory). Additionally, JTAG ISP reduces development time by turning fast iterations of DSP code in the lab. Code updates in the field require no disassembly of product. The FlashLINKTM JTAG programming cable costs $59 USD and plugs into any PC or notebook parallel port.

In addition to ISP Flash memory, DSM devices add programmable logic (PLD) and up to 16 configurable I/O pins to the DSP system. The state of each I/O pin can be driven by DSP software or PLD logic. PLD and I/O configuration are programmable by JTAG ISP, just like the Flash memory. The PLD consists of more than 3000 gates and has 16 macro cell registers. Common uses for the PLD include chip selects for external devices, state-machines, simple shifters and counters, keypad and control panel interfaces, clock dividers, handshake delay, multiplexers, etc. This eliminates the need for small external PLDs and logic devices. Configuration of PLD, I/O, and Flash memory mapping are easily entered in a pointand- click environment using the software development tool, PSDsoft ExpressTM. This software is available at no charge from www.st.com/psm.

DSM2190F4V 特性:

• Glueless Connection to DSP
  – Easily add memory, logic, and I/O to the External Port of ADSP-218x, 219x, 2106x, 2116x, 2153x, and TS101 families of DSPs from Analog Devices, Inc.
• Dual Flash Memories
  – Two independent Flash memory arrays for storing DSP code and data
  – Capable of read-while-write concurrent Flash memory operation
  – Device can be configured as 8-bit or 16-bit
  – Built-in programmable address decoding logic allows mapping individual sectors of each Flash array to any address boundary
  – Each Flash sector can be write protected
• 512 KByte Main Flash memory
  – Ample storage for boot loading DSP code/ data upon reset and subsequent code swaps
  – Large capacity for storing tables and constants or for data recording
• 32 KByte Secondary Flash memory
  – Smaller sector size ideal for storing calibration and configuration constants. Eliminate external serial EEPROM.
  – Optionally bypass internal DSP boot ROM during start-up and execute code directly from Secondary Flash. Use for custom start-up code and In-Application Programming (IAP).
• Up to 40 Multifunction I/O Pins
  – Increase total DSP system I/O capability
  – I/O controlled by DSP software or PLD logic
• General purpose PLD
  – Use for peripheral glue logic to keypads, control panel, displays, LCDs, and other devices
  – Over 3,000 gates of PLD with 16 macro cells
  – Eliminate PLDs and external logic devices
  – Create state machines, chip selects, simple shifters and counters, clock dividers, delays
  – Simple PSDsoft Express? development software, free from www.st.com/psm Figure 1. TQFP 80-pin Package
• In-System Programming (ISP) with JTAG
  – Program entire chip in 15-35 seconds with no involvement of the DSP
  – Optionally links with DSP JTAG debug port
  – Eliminate need for sockets and preprogramming of memory and logic devices
  – ISP allows efficient manufacturing and product testing supporting Just-In-Time inventory
  – Use low-cost FlashLINK? cable with any PC. Available from www.st.com/psm.
• Content Security
  – Programmable Security Bit blocks access of device programmers and readers
• Operating Range
  – VCC: 3.3V ± 10%, Temp: –40°C to +85°C
• Zero-Power Technology
  – 50μA standby current typical
• Flash Memory Speed, Endurance, Retention
  – 120ns, 100K cycles, 15 year retention

DSM2190F4V 技术支持与电子电路设计开发资源下载

1. DSM2190F4V 数据手册DataSheet下载.PDF
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