DSM2190F4V Datasheet, PDF (1/61 Pages) STMicroelectronics – DSM (Digital Signal Processor System Memory) For Analog Devices ADSP-2191 DSPs (3.3V Supply)

DSM2190F4V
DSM (Digital Signal Processor System Memory)
For Analog Devices ADSP-2191 DSPs (3.3V Supply)
FEATURES SUMMARY
s Glueless Connection to DSP
– Easily add memory, logic, and I/O to the Exter-
nal Port of ADSP-2191 DSP
s Dual Flash Memories
– Two independent Flash memory arrays for stor-
ing DSP code and data. DSP may access the
two arrays concurrently (read from one while
erasing or writing the other)
– 256K x 8 Main Flash memory divided into 8 sec-
tors (32KByte each)
– Ample storage for booting DSP code/data
upon reset and subsequent code swaps
– Large capacity for data recording
– 32K x 8 Secondary Flash memory divided into 4
sectors (8 KByte each). Multiple uses:
– Small sector size ideal for small data sets,
and calibration or configuration constants
– Store custom start-up code in one or more
sectors and configure DSP to run from exter-
nal memory upon reset (no boot)
– Concatenate Secondary Flash with Main
Flash for total of 288 KBytes
– Each Flash sector can be write protected.
– Built-in programmable address decoding logic
allows mapping individual Flash sectors to any
address boundary
s Up to 16 Multifunction I/O Pins
– Increase total DSP system I/O capability
– I/O controlled by DSP software or PLD logic
s General purpose PLD
– Over 3,000 Gates of PLD with 16 macro cells
– Use for peripheral glue logic to keypads, control
panel, displays, LCDs, and other devices
– Eliminate PLDs and external logic devices
– Create state machines, chip selects, simple
shifters and counters, clock dividers, delays
– Simple PSDsoft Express^TM software...Free
s Operating Range
– V_CC: 3.3V±10%; Temperature: –40^oC to +85^oC
Figure 1. Packages
PQFP52 (T)
PLCC52 (K)
s In-System Programming (ISP) with JTAG
– Program entire chip in 10-25 seconds with no in-
volvement of the DSP
– Links with ADSP-2191 JTAG debug port
– Eliminate sockets for pre-programmed memory
and logic devices
– ISP allows efficient manufacturing and product
testing supporting Just-In-Time inventory
– Use low-cost FlashLINK^TM cable with PC
s Content Security
– Programmable Security Bit blocks access of de-
vice programmers and readers
s Zero-Power Technology
– As low as 25µA standby current
s Packaging
– 52-pin PQFP or 52-pin PLCC
s Flash Memory Speed, Endurance, Retention
– 150 ns, 100K cycles, 15 year retention
September 2002
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