82C931 Datasheet, PDF (24/64 Pages) List of Unclassifed Manufacturers – Plug and Play Integrated Audio Controller

82C931
931-AD Mode Signal Descriptions (cont.)
3.3.1.4 Game Port and Modem Interface Signals
Signal Name
GD7
MODEMCS#
MODEM#
VOLUP
GD6
MODEMINT
VOLDWN
GD5
VOLUP
GD4
VOLDN
GD3
IRQ4
GD2
IRQ3
GD1
GD0
Pin No.
31
30
29
28
26
25
24
23
Signal Type
(Drive)
Signal Description
I/O-CMOS-Smt Game Port 2 Data Line 7
(8mA)
Modem Chip Select: Output to external modem chip select pin.
Modem Interface Enable Jumper Input: Jumper setting is latched at
power-on reset. Jumper pull-up: disable (default), pull-down: enable.
An external pull-up is required on this pin.
Volume Up: Interface for push-button volume control. Used to
increase volume.
I/O-CMOS-Smt Game Port 2 Data Line 6
(8mA)
Modem Interrupt: Interrupt signal from external modem.
Volume Down: Interface for push-button volume control. Used to
decrease volume. An external pull-up is required on this pin.
I/O-CMOS
(8mA)
Game Port 1 Data Line 5
An external pull-up is required on this pin.
Volume Up: Interface for push-button volume control. Used to
increase volume. VOLUP on pin 29 is only available in rev. 1.1 silicon.
I/O-CMOS
(8mA)
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.
I/O-CMOS
(8mA)
Game Port 2 Data Line 3
Interrupt Request Bit 4
I/O-CMOS
(8mA)
Game Port 2 Data Line 2
Interrupt Request Bit 3
I/O-CMOS
(8mA)
Game Port 1 Data Line 1
I/O-CMOS
(8mA)
Game Port 1 Data Line 0
3.3.1.5 Codec/Mixer Interface Signals
Signal Name
MICL
MICR
LINEL
LINER
CDL
CDR
Pin No.
97
98
96
99
95
100
Signal/Pin
Type (Drive)
I-Analog
I-Analog
I-Analog
I-Analog
I-Analog
I-Analog
Signal Description
Microphone Input Left
Microphone Input Right
Line Input Left
Line Input Right
CD Input Left
CD Input Right
OPTi
®
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912-3000-035
Revision: 2.1