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Posted: 3:00 p.m., EDT, 9/28/98
TI adds C54X DSPs at the high and low end
By Stephan Ohr
HOUSTON — The latest additions to Texas Instruments Inc.'s popular
TMS320C5000 series of DSPs take advantage of the compact structures
made possible by 0.18-micron CMOS processing. In one case, that results
in the C5420, a dual-processor core for space-constrained
telecommunications applications. In another case, it produces the C5402, a
100-Mips device that sells for less than $5.
TI product manager Mark Mattson said the popularity of the C54X core at
cellular-phone suppliers Nokia and Ericsson has made the C5000 one of
the most popular DSP architectures.
Mattson said that the C5402 offers twice the performance, at half the
power consumption, of other leading low-cost phone DSP cores.
Because of its low power consumption, the TI C5402 can be powered
from rechargeable batteries. It targets handheld and consumer-electronics
applications, including digital still cameras; new-generation PDAs with
paging and voice recognition; handheld scanners; and space-constrained
applications like PCMCIA card modems. The device has a power-saving
1.8-V core (though it uses 3.3 V at its pins), said Mark Tiernan, the
C5000 marketing manager. In a home environment, TI believes the C5402
will support Dolby sound decoding (both Dolby Digital and Dolby
Pro-Logic).
The high-end addition to the C5000 processor line is a dual-core DSP, the
C5420. It includes two complete DSPs (with MACs and ALUs) each
producing 100 Mips (200 Mips total). There are 200 kwords of SRAM
on-chip, along with 12 channels of DMA. The device includes six of what
TI calls "McBSP," a multichannel buffered serial port. This supports T1/E1
and other specialized telephony interfaces.
The device specifically targets multichannel applications like telephone line
cards in cellular basestations and central-office switching facilities.
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