92HD65C Datasheet, PDF (34/268 Pages) Integrated Device Technology – SIX CHANNEL HD AUDIO CODECS

92HD65C
SIX CHANNEL HD AUDIO CODEC WITH DUAL CAPLESS HEADPHONE AMPLIFIERS
The digital core voltage regulator is only dependent on DVDD. DVDDIO may be either 3.3 or 1.5V
and may precede or follow DVDD in sequence. The CODEC digital logic and I/O (unless referenced
to AVDD) will operate in the absence of AVDD. DVDD and AVDD supply sequencing for the applica-
tion of power and the removal of power is neither defined nor guaranteed. It is common for desktop
systems to supply AVDD from the system standby supply and the CODEC will tolerate, indefinitely,
the condition where AVDD is active but DVDD and DVDDIO are inactive.
2.26. Combo Jack
The codec implements a sophisticated microphone detection algorithm to differentiate between
headphones and headsets when implementing 4-conductor “combo” jacks. A programmable sense
window (2s to ∞) provides flexibility in managing problematic slow plug insertions and partial inser-
tions. Programmable de-bounce, anti-pop delay, and headphone-microphone unsolicited response
delay controls help ensure a robust, pleasing, experience for the end user. Support for a lanyard
(“turbo”) switch using IDT’s driver further enhances combo-jack implementations by supporting
many common cellular headsets.
IDT CONFIDENTIAL
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©2011 INTEGRATED DEVICE TECHNOLOGY, INC.
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92HD65C