Engineers of audio, medical, industrial and emerging applications have traditionally implemented floating-point digital signal processors (DSPs) because they offer dynamic range and high precision for data accuracy and easy algorithm programmability. Now, Texas Instruments has announced three new devices designed to transcend traditional floating-point processors, enabling engineers to easily design more portable, connected, cost-efficient and high-precision end products.
The three new devices, based on TI’s new C674x DSP core, merge the inherent advantages of floating-point with a combination of connectivity peripherals, low power and low cost. The new processors include low-power floating-point DSPs – the TMS320C6745 and TMS320C6747– as well as the OMAP-L137 floating-point-DSP-plus-ARM applications processor.
The processors include USB 2.0/1.1, 10/100 Ethernet and multimedia card/secure digital (MMC/SD) peripherals to ensure that developers can easily add connectivity options to their designs.
The C6745, which runs at up to 300 MHz, includes an extensive set of serial ports for system control, as well as multichannel audio serial ports with up to 16 serialisers and FIFO buffers. It also includes two external memory interfaces: an asynchronous and SDRAM external 8-bit memory interface (EMIFA) for slower memories or peripherals and a higher speed 16-bit synchronous external memory interface (EMIFB) for SDRAM.
For additional system performance, the C6747 includes all of the features of the C6745 and incorporates an additional 128 KB of on-chip RAM. The EMIFA and EMIFB on the C6747 are also upgraded to 16-bit and 32-bit, respectively. An LCD controller is on-chip, allowing designers to add quarter video graphics array (QVGA) or other displays to their end products.
The OMAP-L137 applications processor includes the C674x floating-point DSP core plus an ARM9, providing up to 300 MHz per core. With the on-chip ARM9, developers can leverage the floating-point DSP for realtime, processing-intensive computations while off-loading non-realtime tasks to the ARM. Additionally, developers can use the ARM to implement various high-level operating systems such as WinCE or Linux.
Both the C6745 and C6747 consume 62 mW in standby mode and 470 mW in total active power mode, while the OMAP-L137 uses 62 mW in standby and 490 mW total active power.
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