參數(shù)資料
型號(hào): 82C931
廠商: Electronic Theatre Controls, Inc.
英文描述: Plug and Play Integrated Audio Controller
中文描述: 即插即用集成音頻控制器
文件頁(yè)數(shù): 17/64頁(yè)
文件大?。?/td> 634K
代理商: 82C931
82C931
912-3000-035
Revision: 2.1
Page 9
OPTi
3.2.1.3
Configuration and External PnP EEPROM Interface Signals
Signal Name
Pin No.
Signal/Pin
Type (Drive)
Signal Description
ROMCS
12
I/O-TTL, PU
(8mA)
External Serial EEPROM Chip Select
PNPEN
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
GPIO1
11
I/O-TTL, PU
(8mA)
General Purpose Input/Output
MODE0
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.
GPIO2
35
I/O-TTL, PD
(12mA)
General Purpose Input/Output
ROMCLK
External Serial EEPROM Clock
GPIO3
36
I/O-TTL, PU
(12mA)
General Purpose Input/Output
ROMDOUT
External Serial EEPROM Data Out
ROMDIN
37
I/O-TTL, PD
(12mA)
External Serial EEPROM Data In
EEPROM enable jumper input function is removed
RESET#
34
O
(12mA)
Buffered Reset
(active low)
GPIO0
43
I/O-TTL, PU
(8mA)
General Purpose I/O Bit 0
SDHOE
SD[15:8] Buffer Output Enable:
Set MCIR19[7] = 1 to enable
SDHOE function on this pin.
EXTROM
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
Pin No.
Signal/Pin
Type (Drive)
Signal Description
GD7
31
I/O-CMOS-Smt
(8mA)
Game Port 2 Data Line 7
SADI
Serial Audio Data Input
VOLUP
Volume Up:
Interface for push-button volume control. Used to
increase volume. An external pull-up is required on this pin.
GD6
30
I/O-CMOS-Smt
(16mA)
Game Port 2 Data Line 6
SADO
Serial Audio Data Output
VOLDWN
Volume Down:
Interface for push-button volume control. Used to
decrease volume. An external pull-up is required on this pin.
GD5
29
I/O-CMOS
(8mA)
Game Port 1 Data Line 5
An External pull-up is required on this pin.
VOLUP
Volume Up:
Interface for push-button volume control. Used to
increase volume. VOLUP on pin 29 is only available in rev. 1.1 silicon.
931-MB Mode Signal Descriptions (cont.)
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