GENEVA--STMicroelectronics today announced it has collaborated with Analog Devices Inc. to introduce the world's first "DSP system memory"--a device that integrates a large block of flash storage, programmable logic, input/output ports, and interfaces for a digital signal processor.
STMicroelectronics said its new DSM2180F3 has been tailored to provide a complete memory solution with in-system programming for Analog Devices' ADSP-218x series of processors. The DSM--DSP system memory--allows larger flash memory with JTAG-based in-system programming to be added to equipment designs without additional glue logic chips or interface ICs, according to the company.
By working with Analog Devices, ST has optimally matched the requirements of the ADSP-218x DSP series "with a complete turn-key system memory solution that effectively reduces both customers' time-to-market and overall system costs," said Reza Kazerounian, general manager of the ST division offering the new memory device. Additional DSP system memories are planned for the new series.
The DSM2180F3 has 128 kilobytes of in-system programming flash, which is sufficient storage for multiple iterations of program code and/or expanded data storage, said STMicroelectronics. The flash memory is configured as eight sectors of 16 Kbytes each. On-chip memory-decode and paging logic allows the DSP to access the flash memory either via "Byte DMA" (BDMA), which STMicroelectronics said provides a highly efficient way of reading large blocks of flash memory.
The 16-Kbyte sector size matches the size of the DSP's external data overlay address "window," making for efficient data management, while the on-chip paging logic gives the processor access to the entire 128 Kbytes of flash memory, said ST. This allows the DSP to write to the flash memory with maximum efficiency when updating code in the field or updating parameters and other data.
The DSP system memory chip's PLD block contains 16 macrocells that can be used to implement functions such as chip-selects for external devices, state-machines, counters, keypad and control panel interfaces, clock dividers, handshake delays and multiplexers, eliminating the need for other small external PLDs and logic devices. The 16 additional I/O pins on the DSM device can be driven by either the DSP software or by PLD logic. This effectively doubles or triples the current I/O available on the ADSP-218x processors, said ST.
In August, a turn-key development system will be made available for designs using the Analog Devices processors and DSP system memory. The development system, called DK2180, will include complete software development tools from Analog Devices.
Pricing on the DSP system memories was not released.