Document
CS4299
CrystalClear® SoundFusion™ Audio Codec ’97
Features
AC ’97 2.1 Compatible
Industry Leading Mixed Signal Technology
20-bit Stereo Digital-to-Analog Converters
18-bit Stereo Analog-to-Digital Converters
Sample Rate Converters
Four Analog Line-level Stereo Inputs for LINE_IN, CD, VIDEO, and AUX
Two Analog Line-level Mono Inputs for Modem and Internal PC Beep
Dual Stereo Line-level Outputs for LINE_ OUT and ALT_LINE_OUT
Dual Microphone Inputs
High Quality Pseudo-Differential CD Input
Extensive Power Management Support
Meets or Exceeds the Microsoft PC 99 Audio Performance Requirements
S/PDIF Digital Audio Output CrystalClear 3D Stereo Enhancement
Description
The CS4299 is an AC ’97 2.1 compatible stereo audio codec designed for PC multimedia systems. Using the industry leading CrystalClear® delta-sigma and mixed signal technology, the CS4299 enables the design of PC 99-compliant desktop, portable, and entertainment PCs.
Coupling the CS4299 with a PCI audio accelerator or core logic supporting the AC ’97 interface, implements a cost effective, superior quality, audio solution. The CS4299 surpasses PC 99 and AC ’97 2.1 audio quality standards.
ORDERING INFO CS4299-BQZ lead-free 48-pin LQFP 9x9x1.4 mm CS4299-JQZ lead-free 48-pin LQFP 9x9x1.4 mm
SYNC BIT_CLK SDATA_OUT SDATA_IN RESET#
AC-LINK AND AC'97 REGISTERS
PWR MGT
ANALOG INPUT MUX AND OUTPUT MIXER
ACLINK
AC'97 REGISTERS
S/PDIF
SRC
PCM_DATA
GAIN / MUTE CONTROLS MIXER / MUX SELECTS
SRC
PCM_DATA
ADC INPUT 18 bits MUX
OUTPUT MIXER
DAC
20 bits
LINE CD AUX VIDEO
MIC1 MIC2
PHONE PC_BEEP
LINE_OUT ALT_LINE_OUT MONO_OUT
http://www.cirrus.com
Copyright Cirrus Logic, Inc. 2001–2015 (All Rights Reserved)
JUN ‘15 DS319F1
1
CS4299
Table of Contents
1 Characteristics and specifications ............................................................................................................................. 4 2 General Description ...................................................................................................................................................... 9
2.1 AC-Link .................................................................................................................................................................. 9 2.2 Control registers ................................................................................................................................................... 9 2.3 Sample Rate Converters ....................................................................................................................................... 9 2.4 Output Mixer ........................................................................................................................................................ 10 2.5 Input Mux ............................................................................................................................................................. 10 2.6 Volume Control .................................................................................................................................................... 10 3 AC Link Frame Definition ........................................................................................................................................... 11 3.1 AC-Link Serial Data Output Frame ...................................................................................................................... 12 3.2 AC-Link Audio Input Frame ................................................................................................................................. 14 3.3 AC-Link Protocol Violation - Loss of SYNC ......................................................................................................... 16 4 Register Interface ....................................................................................................................................................... 17 5 Power Management .................................................................................................................................................... 31 5.1 AC ’97 Reset Modes ............................................................................................................................................ 31
5.1.1 Cold AC ‘97 Reset ...................................................................................................................................... 31 5.1.2 Warm AC ’97 Reset .................................................................................................................................... 31 5.1.3 Register AC ’97 Reset ................................................................................................................................ 31 5.2 Powerdown Controls ....................................................................................................................................