92HD99B Datasheet, PDF (33/225 Pages) Integrated Device Technology – SINGLE CHIP PC AUDIO SYSTEM

92HD99
SINGLE CHIP PC AUDIO SYSTEM, CODEC+SPEAKER AMPLIFIER+CAPLESS HP+LDO
2.24.3. “Playback Path” Port Behavior (AnaIog I/O)
Port F (“dock microphone”) input is routed to Port D (“internal speakers”) and Port B (system head-
phone port). The analog mixer is disabled to reduce power consumption.
2.24.4.
When Port E presence detect = 0
• Presence detect for Port E = 0 (nothing plugged in)
• Port F, the “dock microphone”, input is routed to Port B, or D when that port is active
• The power supply (charge pump) for B will be inactive if B is not in use.
• If Port B is not in use (port presence detect = 0), Port D, internal speakers, will be active and port
B will be inactive.
• EAPD must not be forced low due to the dock being absent or high when a dock is present.
EAPD is used to indicate if AUX Audio Mode is in use.
2.24.5.
When Port E presence detect = 1
• Presence detect for Port E = 1 (something plugged in)
• Port D is disabled
• If Port B is in use (port presence detect = 1), that port will be enabled and output the audio enter-
ing Port F
• The power supply for port B will be active if port B is in use.
• If Port B is not in use (port presence detect = 0), port B will be inactive and the audio on Aux_In
will be mixed with the audio from the Secondary Audio input and routed to Port E, the dock
headphone jack.
• EAPD must not be forced low due to the dock being absent or high when a dock is present.
EAPD is used to indicate if AUX Audio Mode is in use.
EAPD
(pin)
0
1
Aux
Support
Enable¹
NA
0
Port E
detect
NA
NA
1
1
0
1
1
0
Port B
detect
NA
NA
Port A, C, F,
DMIC
detect
NA
NA
0
NA
1
NA
Port D
behavior
disabled
Widget controlled
enabled
(F to D)
disabled
1
1
1
0
NA
disabled
1
1
1
1
NA
disabled
1.default value for Aux Audio Enable is determined by bond option.
Port B
behavior
disabled
Widget controlled
disabled
enabled
(F to B)
disabled
enabled
(F to B)
Port E
behavior
disabled (mute)
Widget controlled
disabled (mute)
disabled (mute)
enabled
Aux+Secondary
disabled (mute)
IDT™ CONFIDENTIAL
33
©2009 INTEGRATED DEVICE TECHNOLOGY, INC.
V1.2 1/12
92HD99