EDN Product fEEd

May 15 2008 12:00AM | Permalink | Email this | Comments (1) |
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Six 28- and 44-pin 16-bit dsPIC DSCs (digital-signal controllers) each include a dual-channel, 100k-sample/sec, 16-bit audio DAC module. The DMA-enabled devices have 16 kbytes of RAM, including 2 kbytes of dual-port RAM, and offer 64 and 128 kbytes of flash memory. The DSCs provide speech-compression libraries, such as G.711 at 64 kbps, ADPCM (adaptive-differential-pulse-code-modulation) G.726A at 16 to 40 kbps, and Speex at 8 kbps. Operating over a –40 to +85°C temperature range or a –40 to +125°C extended-temperature range, the devices also include CRC (cyclic-redundancy-checking) hardware, a PPS (peripheral-pin-select) function, and a parallel master/slave port. Additional features include two analog comparators, a user-selectable 10- or 12-bit ADC, and a real-time clock and calendar. Serial peripherals include two UARTs, two SPIs, I²C, and CAN (controller-area-network) 2.0B. Four of the devices provide a codec interface supporting I²S and AC (audio codec)’97 protocols. Two of the 44-pin controllers offer motor-control and power-conversion peripherals, including a three-phase PWM (pulse-width modulator), a power-factor-correction PWM, and two quadrature-encoder interfaces. The dsPIC DSC devices are available in QFN-, SOIC-, and SPDIP-28 or QFN- and TQFP-44 packages, and prices range from $3.67 to $4.18 (10,000).

Microchip Technology, www.microchip.com