LC823455 Audio Processing System

ON Semiconductor's LC823455 low power and high-resolution audio processing system LSI for portable sound solutions

ON Semiconductor's LC823455 Audio Processing System ON Semiconductor's LC823455 is an audio processing system on chip (SoC) for recording and playback with high-resolution 32-bit and 192 kHz audio processing capability. It provides required key functions for portable sound solutions, which are dual CPU configuration, DSP providing intensive processing capability, 4,316 KB of internal SRAM that supports the implementation of large-scale programs for WLAN applications, and multiple interfaces to extensively increase its connectivity. It features a broad range of functions, including SBC/AAC codec and active noise canceller applicable for wearable audio applications.

Features

Arm® Cortex®-M3 dual and proprietary 32-bit DSP (LPDSP) multi-core system
Internal 4,316 KB large SRAM for Arm Cortex-M3 dual-core and proprietary 32-bit DSP
Shorten ambient acoustic sound path
Hard wired audio functions:

Asynchronous sample rate converter (ASRC)
Hardware mixer
6-band equalizer (EQ)

Integrated analog functions:

4 channels of digital MIC PDM I/F
Low-power Class D HP amplifier
System PLL
Dedicated audio PLL, ADC

Various proprietary DSP codes for audio processing: MP3 codec, SBC codec, FLAC codec, noise-canceling, echo canceling, and so forth
Various interfaces:

USB2.0 HS device
eMMC
SD card
SPI, I²C

High-resolution 32-bit and 192 kHz audio processing capable
UART with DMA and FIFO support low power Bluetooth® audio
Miniaturized 4.086 mm x 4.086 mm WLCSP package

Benefits

1-chip solution lowers BOM cost
No extra memory required for WLAN application
Enabling ANC function
DSP code's development cost reduction: several DSP codes are available with no additional fee such as noise-canceling, echo canceling, and so forth