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
文件頁數(shù): 23/64頁
文件大?。?/td> 634K
代理商: 82C931
82C931
912-3000-035
Revision: 2.1
Page 15
OPTi
3.3.1.3
Configuration, External PnP EEPROM, and IDE CD-ROM 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 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 I/O Bit 1
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.
CA2
35
I/O-TTL, PD
(12mA)
IDE CA2:
Buffered SA2 for CD-ROM
ROMCLK
External Serial EEPROM Clock
IDEDIS#
IDE Disable:
Jumper selection to disable IDE resource. No connect
equals IDE enabled. Pull down equals IDE disabled. (Available in revi-
sion 1.1 silicon only.)
CA1
36
I/O-TTL, PD
(12mA)
IDE CA1:
Buffered SA1 for CD-ROM.
ROMDOUT
External Serial EEPROM Data Out
CA0
37
I/O-TTL, PD
(12mA)
IDE CA0:
Buffered SA0 for CD-ROM.
ROMDIN
External Serial EEPROM Data In
IDECS1#
38
O-TTL
(12mA)
IDE CD-ROM Chip Select Bit 1:
CD-ROM chip select for address
decode range 0170h through 0177h.
IDECS3#
39
O-TTL
(12mA)
IDE CD-ROM Chip Select Bit 3:
CD-ROM chip select for ISA address
decode range 0376h through 0377h.
IDEIRQ
41
I/O-TTL
(12mA)
IDE CD-ROM Interrupt:
Interrupt input from IDE CD-ROM which redi-
rect to IRQ5, 7, 9, 10, 11, 15 according to PNP logic.
GPIO2
General Purpose I/O Bit 2
RESET#
34
O
(12mA)
Buffered Reset
(active low)
CDOE#
44
O-TTL
(8mA)
CD Output Enable:
Enables low-order [7:0] of the CD data buffer.
CDHOE#
45
O-TTL
(8mA)
CD High Output Enable:
Enables high-order [15:8] of CD data buffer.
XIOR#
32
O-TTL
(12mA)
IDE Buffered IOR#
XIOW#
33
O-TTL
(12mA)
IDE Buffered IOW#
931-AD Mode Signal Descriptions (cont.)
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