Date: 13/09/2010
Low-power DSPs with power spec of 0.15 mW/MHz
Texas Instruments has made available the TMS320C5504 and TMS320C5505 ultra-low-power digital signal processors (DSPs) at 150 MHz. TI claims that these processors deliver 25% higher performance than previous C55x devices.
The total power consumtion for C5504 and C5505 is specified at 0.15 mW/MHz and standby power at less than 0.15 mW. The processors feature up to 320 KB of on-chip memory and multiple integrated peripherals. Dynamic voltage and frequency scaling can be used to maximize the battery life for different operating conditions, allowing up to 40 percent additional battery life compared to earlier C55x processors.
C5504 and C5505 total power consumption
Power Consumption Performance
<0.15 mW/MHz 60 MHz
<0.22 mW/MHz 120 MHz
<0.27 mW/MHz 150 MHz
The C5504 DSP is suggested for emerging portable applications that require up to 256 kB on-chip memory, such as portable voice recorders and MP3 players. The C5505 DSP builds on the C5504 by adding an additional 64 kB on-chip memory, an integrated display controller and fast Fourier transform (FFT) hardware acceleration for end equipments such as noise-cancellation headphones, musical instruments, medical monitoring, biometrics and seismic sensors.
Both devices are pin-to-pin and software compatible, offering the same energy efficiency and performance with a different peripheral set. This allows system designers to develop one platform that bridges different price markets by migrating between processors.
The C5504 can integrated with high-speed USB 2.0, I2S, UART, SPI, MMC/SD and GPIOs. It has a 16-bit dual-MAC CPU, which integrates a digital signal processing core for audio, voice and smart sensor applications
The C5505 eliminates the need for external memory. This processor provides up to 1024-point programmable FFT hardware accelerator, thus increasing the computational throughput while providing energy efficiency for a long battery life and a reduction in total system power. The C5505 augments peripherals available on C5504, integrating an LCD display controller and 10-bit 4-channel successive approximation (SAR) ADC.
Price:
TMS320C5504: US$6.20 for 1K pieces.
TMS320C5505: US$7.45 for 1K pieces.
Availability: Sampling now