Differentiating from the legacy Cirrus multi-standard, multichannel decoders, this new CS485xx family is still based on the same high-performance 32-bit fixed point Digital Signal Processor core but instead is equipped with much less memory, tailoring it for more cost-effective applications associated with multi-channel and virtual-channel sound enhancements.

FEATURES

❐ Cost-effective, High-performance 32-bit DSP

— 300,000,000 MAC/S (multiply accumulates per second)

— Dual MAC cycles per clock

— 72-bit accumulators are the most accurate in the industry

— 24k x 32 SRAM, 2k blocks - assignable to data or program

— Internal ROM contains a variety of configurable sound enhancement feature sets

— 8-channel internal DMA

— Internal watch-dog DSP lock-up prevention

❐ DSP Tool Set w/ Private Keys for Protecting Customer IP

❐ Configurable Serial Audio Inputs/Outputs

— Configurable for all input/output types

— Maximum 32-bit @ 192 kHz

— Supports 32-bit audio sample I/O between DSP chips

— TDM input modes (multiple channels on same line)

— 192 kHz SPDIF transmitter

— Multi-channel DSD direct stream digital SACD input

❐ Supports Two Different Input Fs Sample Rates

— Output can be master or slave

— Dual processing path capability

— Input supports dual domain slave clocking

— Hardware assist time sampling for sample rate conversion

❐ Integrated Clock Manager/PLL

— Can operate from external crystal, external oscillator

❐ Input Fs Auto Detection

❐ Host & Boot via Serial Interface

❐ Configurable GPIOs and External Interrupt Input

❐ 1.8V Core and a 3.3V I/O that is tolerant to 5V input

❐ Low-power Mode

— “Energy-Star Ready” via low-power mode, 268 µW in standby