92hd98 Integrated Device Technology, 92hd98 Datasheet - Page 36

• Manufacturer Part Number: 92hd98
• Description: Datasheet
• Manufacturer: Integrated Device Technology

92HD98
SINGLE CHIP PC AUDIO SYSTEM, CODEC+MONO SPEAKER AMPLIFIER+CAPLESS HP+LDO
©2009 INTEGRATED DEVICE TECHNOLOGY, INC.
IDT™ CONFIDENTIAL
AUX_enable
(register)
2.24.2. Entering Aux Audio Mode
Operation
Dig_POR
Power state
DVDD
Link_reset
mode
Enter AUX mode under two conditions, refer to figure below:
•
•
Port F (“dock microphone”) input is routed to Port D (“internal speakers”), Ports B (system head-
phone port), and Port E (“dock Line Out”) directly. The analog mixer is disabled to reduce power con-
sumption.
Note: At that time, Force Portsense and BTL Amp on when we enter link reset if the AuxAudio bit
is set. If the AuxAudio bit is not set (by bond option or software) then we will not enter Aux Audio
Mode-Portsense and BTL Amp will remain off.
AUX_mode
When DVDD is powered-up, the value of AUX_enable register is “enabled” (one), and before
link reset is de-asserted (pull high).
If AUX_enable is “enabled” (one) and the Power state is D3cold then chip will also enter AUX
mode but the Clock_Stop_OK flag is not required (set to 1 if convenient.). (Note that the part will
enter Aux mode immediately upon transition to D3cold. It is possible to return to normal opera-
tion by issuing a double AFG reset if the link is still active.)
D3
Figure 11. Switching between Normal and Aux Audio Modes
Normal mode
D0
D3 with clock
36
D3
D3 clockless
Normal mode
D0
AUX_mode
D3 cold
V 0.91 10/10
92HD98