CX20921 datasheet(8/35 Pages) CONEXANT

8 / 35 page

CX20921 AudioSmart Data Sheet

Features

Conexant Confidential

03/11/15

001DSR01

Features

Cores

•

C-programmable dual core 32-bit DSP (CAPE) with X and Y data, P memory spaces running at worst-

case 200MHz, and yields 800MIPS

•

Each core has dual Multiply-Accumulate (MAC) and dual memory

•

Fixed point DSP with floating point assist

•

Each MAC supports 32 x 24-bit and 64-bit accumulators

•

Supports zero-overhead loop, circular buffers, and bit-reverse indexing

•

32-bit Arithmetic Logic Unit (ALU) that supports efficient bit manipulation

•

Data memory access is 16-bit, 32-bit, and 64-bit

•

Virtually all programming is done in C, using a very efficient C-compiler from Target

•

Natively supported data types include: int, short, long, long long, Q15, Q23, Q8.23, and Q31

On-Chip Memory

Integrated memory 747KB SRAM and 66KB ROM:

•

ROM = 46KB (Data) and 20KB (Program)

•

RAM = 522KB (Data) and 225KB (Program)

Voice CODEC

•

Two high performance ADCs with programmable pre-amplifiers

•

Differential or single-ended microphone inputs

•

Microphone or line input support

•

ADC audio performance:

–

Dynamic range = 106dB at 0dB

–

THD+N = –84dB at –1dBFS

•

Supported audio sample rates:

–

8kHz

–

16kHz

–

24kHz

–

32kHz

–

44.1kHz

–

48kHz

–

96kHz

•

Two microphone bias—one for each of the two ADCs. Supported voltage = 1.5V to 4.0V.

•

Programmable pre-amplifier with integrated analog and digital gains:

–

Analog gain = 6dB to 24dB with 1dB steps

–

Digital gain = –74dB to 12dB with 0.125dB steps

•

Smart gain controller adjusts the gain in both analog and digital to allow high dynamic range at

different gains

CX20921 Datasheet(PDF) 8 Page - Synaptics Incorporated.

CX20921 Datasheet(HTML) 8 Page - Synaptics Incorporated.

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35

Datasheet Download

Link URL