
IDT CONFIDENTIAL
32
V 0.987 11/09
2009 INTEGRATED DEVICE TECHNOLOGY, INC.
92HD81
SINGLE CHIP PC AUDIO SYSTEM, CODEC+SPEAKER AMPLIFIER+CAPLESS HP+LDO
AFG
Power
State
RESET#
BEEP
Override
EAPD
Power State
Pin Behavior
D0-D3
Asserted (Low)
-
Active low immediately after power on, otherwise the
previous state is retained across FG and link reset events
D0
De-Asserted (High)
-
Active - Pin reflects EAPD bit unless held low by external
source.
D1
De-Asserted (High)
-
D0-D1
Active - Pin reflects EAPD bit unless held low by external
source.
D2
De-Asserted (High)
Disabled
D0-D2
Pin forced low to disable external amp
D2
De-Asserted (High)
Enabled
D0-D2
Active - Pin reflects EAPD bit unless held low by external
source.
D3
De-Asserted (High)
Disabled
D0-D3
Pin forced low to disable external amp
D3
De-Asserted (High)
Enabled
D0-D3
Active - Pin reflects EAPD bit unless held low by external
source.
D3cold
De-Asserted (High)
-
Pin forced low to disable external amp
D4
De-Asserted (High)
-
Pin forced low to disable external amp
D5
De-Asserted (High)
-
Pin Hi-Z (off)
Table 11. EAPD Behavior