82C931 Datasheet, PDF (18/64 Pages) List of Unclassifed Manufacturers – Plug and Play Integrated Audio Controller

82C931
931-MB Mode Signal Descriptions (cont.)
3.2.1.4 Game Port and Serial Audio Interface Signals
Signal Name
GD4
VOLDN
GD3
SCLK
GD2
FSYNC
GD1
GD0
Pin No.
28
26
25
24
23
Signal/Pin
Type (Drive)
I/O-CMOS
(8mA)
I/O-CMOS
(8mA)
I/O-CMOS
(8mA)
I/O-CMOS
(8mA)
I/O-CMOS
(8mA)
Signal Description
Game Port 1 Data Line 4
An External pull-up is required on this pin.
Volume Down: Interface for push-button volume control. Used to
decrease volume. VOLDN on pin 28 is only available in rev. 1.1 silicon.
Game Port 2 Data Line 3
Serial Audio Clock
Game Port 2 Data Line 2
Serial Audio Synchronization
Game Port 1 Data Line 1
Game Port 1 Data Line 0
3.2.1.5 Codec/Mixer Interface Signals
Signal Name
MICL
MICR
LINEL
LINER
CDL
CDR
AUXL
AUXR
OUTL
OUTR
MIXOUTL
MIXOUTR
CINL
CINR
VREF1
VREF2
Pin No.
97
98
96
99
95
100
94
1
92
93
91
89
90
88
2
86
Signal/Pin
Type (Drive)
I-Analog
I-Analog
I-Analog
I-Analog
I-Analog
I-Analog
I-Analog
I-Analog
O-Analog
O-Analog
O-Analog
O-Analog
I-Analog
I-Analog
O-Analog
O-Analog
Signal Description
Microphone Input Left
Microphone Input Right
Line Input Left
Line Input Right
CD Input Left
CD Input Right
Auxiliary Input Left
Auxiliary Input Right
Output Left
Output Right
Mixer Output Left
Mixer Output Right
ADC Filter Pin Left
ADC Filter Pin Right
Analog Common: Normally connected to AGND with a 0.1µF ceramic
capacitor in parallel with a 10µF electrolytic capacitor.
Voltage Reference: Nominal 1.85V reference available externally. Not
meant for current sourcing or sinking. Normally connected to AGND
with a 0.1µF ceramic capacitor in parallel with a 10µF electrolytic
capacitor.
OPTi
®
Page 10
912-3000-035
Revision: 2.1