CS6422
CS6422
TABLE OF CONTENTS
1. CHARACTERISTICS AND SPECIFICATIONS ........................................................................ 5
ABSOLUTE MAXIMUM RATINGS ........................................................................................... 5
RECOMMENDED OPERATING CONDITIONS ....................................................................... 5
POWER CONSUMPTION ........................................................................................................ 5
ANALOG CHARACTERISTICS................................................................................................ 5
ANALOG TRANSMISSION CHARACTERISTICS.................................................................... 6
MICROPHONE AMPLIFIER ..................................................................................................... 6
DIGITAL CHARACTERISTICS................................................................................................. 6
SWITCHING CHARACTERISTICS .......................................................................................... 7
2. OVERVIEW ............................................................................................................................... 9
3. FUNCTIONAL DESCRIPTION ................................................................................................. 9
3.1 Analog Interface ................................................................................................................. 9
3.1.1 Acoustic Interface ................................................................................................ 10
3.1.2 Network Interface ................................................................................................ 11
3.2 Microcontroller Interface .................................................................................................. 11
3.2.1 Description .......................................................................................................... 11
3.2.2 Register Definitions ............................................................................................. 12
3.3 Register 0 ......................................................................................................................... 13
3.3.1 Mic - Microphone Preamplifier Enable .................................................................... 14
3.3.2 HDD - Half-Duplex Disable...................................................................................... 14
3.3.3 GB - Graded Beta.................................................................................................... 14
3.3.4 RVol - Receive Volume Control............................................................................... 14
3.3.5 TSD - Transmit Suppression Disable...................................................................... 14
3.3.6 ACC - Acoustic Coefficient Control ......................................................................... 15
3.3.7 TSMde - Transmit Suppression Mode..................................................................... 15
3.4 Register 1 ......................................................................................................................... 16
3.4.1 THDet - Transmit Half-Duplex Detection Threshold................................................ 17
3.4.2 Taps - AEC/NEC Tap Allocation ............................................................................. 17
3.4.3 TVol - Transmit Volume Control.............................................................................. 17
3.4.4 RSD - Receive Suppression Disable....................................................................... 17
3.4.5 NCC - Network Coefficient Control.......................................................................... 17
3.4.6 AuNECD - Auto re-engage NEC Disable ................................................................ 17
3.5 Register 2 ......................................................................................................................... 18
3.5.1 RHDet - Receive Half-Duplex Detection Threshold ................................................ 19
3.5.2 RSThd - Receive Suppression Threshold............................................................... 19
3.5.3 NseRmp - Noise estimator Ramp rate .................................................................... 19
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http://www.cirrus.com/corporate/contacts/sales.cfm
Preliminary product information describes products which are in production, but for which full characterization data is not yet available. Advance product infor-
mation describes products which are in development and subject to development changes. Cirrus Logic, Inc. has made best efforts to ensure that the information
contained in this document is accurate and reliable. However, the information is subject to change without notice and is provided “AS IS” without warranty of any
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CIRRUS [ CIRRUS LOGIC ]
