82C931 Datasheet, PDF (17/64 Pages) List of Unclassifed Manufacturers – Plug and Play Integrated Audio Controller

82C931
931-MB Mode Signal Descriptions (cont.)
3.2.1.3 Configuration and External PnP EEPROM Interface Signals
Signal Name
ROMCS
PNPEN
GPIO1
MODE0
GPIO2
ROMCLK
GPIO3
ROMDOUT
ROMDIN
RESET#
GPIO0
SDHOE
EXTROM
Pin No.
12
11
35
36
37
34
43
Signal/Pin
Type (Drive)
I/O-TTL, PU
(8mA)
I/O-TTL, PU
(8mA)
I/O-TTL, PD
(12mA)
I/O-TTL, PU
(12mA)
I/O-TTL, PD
(12mA)
O
(12mA)
I/O-TTL, PU
(8mA)
Signal Description
External Serial EEPROM Chip Select
PNP Mode Enable Jumper Input: Jumper setting is latched at reset
power-on reset. This pin has an internal pull-up. Jumper pull-up:
enable (default), pull-down: disable
General Purpose Input/Output
931 Mode Configuration Bit 0: This pin is used to configure the
82C931 in either the 931-MB or 931-AD mode (refer to Table 3-1).
These settings are latched into the 82C931 at reset.
General Purpose Input/Output
External Serial EEPROM Clock
General Purpose Input/Output
External Serial EEPROM Data Out
External Serial EEPROM Data In
EEPROM enable jumper input function is removed
Buffered Reset (active low)
General Purpose I/O Bit 0
SD[15:8] Buffer Output Enable: Set MCIR19[7] = 1 to enable
SDHOE function on this pin.
External EEPROM enable jumper input: jumper setting is latched at
power-on reset. This pin has internal pull-up. Jumper pull-up: disable
(default), pull-down: enable
3.2.1.4 Game Port and Serial Audio Interface Signals
Signal Name
GD7
SADI
VOLUP
GD6
SADO
VOLDWN
GD5
VOLUP
Pin No.
31
30
29
Signal/Pin
Type (Drive) Signal Description
I/O-CMOS-Smt Game Port 2 Data Line 7
(8mA)
Serial Audio Data Input
Volume Up: Interface for push-button volume control. Used to
increase volume. An external pull-up is required on this pin.
I/O-CMOS-Smt Game Port 2 Data Line 6
(16mA)
Serial Audio Data Output
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.
912-3000-035
Revision: 2.1
OPTi
®
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