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參數(shù)資料
| 型號： | VT83C469 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | PCMCIA Socket Controller |
| 中文描述： | PCMCIA插槽控制器 |
| 文件頁數(shù)： | 6/36頁 |
| 文件大?。?/td> | 156K |
| 代理商： | VT83C469 |
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VIA Technologies, Inc.
Plug and Play
Preliminary
VT83C469
6
The VT83C469 supports the Plug and Play 1.0 specifications which provides automatic configuration capability.
This feature allows the Plug and Play BIOS or Operating System (i.e. Windows 95) to relocate the VT83C469
register from the default to 3E0h/3E1h, 3E2h/3E3h or any other I/O address from the EEPROM containing the I/O
resource.
When Plug and Play is enabled, the drive bay buffer mode cannot be enabled and the INTR# output cannot be used.
In order to enable Plug and Play mode, the following register strapping must be used: pull down HDACK# and pull
down HTC.
Three 8 bit ports are used by the software to access the Plug and Play configuration space. The ports are listed in the
following table:
P
ORT
N
AME
Address
Write_data
Read_data
L
OCATION
279H
A79H
200H ~ 3FFH
L
OCATION
Write only
Write only
Read only
Auto Configuration Registers
PnP Register set
ADD
0x00
0x01
0x02
0x03
0x04
0x05
0x06
0x07
0x30
0x31
0x60
0x61
STD
X
X
X
X
X
X
X
X
X
X
X
X
DESCRIPTION
SET READ_DATA PORT
SERIAL ISOLATION
CONFIGURE CONTROL
WAKE CSN
RESOURCE DATA
STATUS
CARD SELECT NUMBER
LOGICAL DEVICE NUMBER
ACTIVES
I/O RANGE CHECK
I/O BASE ADDRESS 0 [15:8]
I/O BASE ADDRESS 0 [7:0]
DEF
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
Type
W
R
W
W
R/W
R
R/W
R
W
R/W
R/W
R/W
PC Card DMA Operations
The VT83C469 supports the use of a PC card as an interface with a DMA device. The VT83C469 defines an
extension to the I/O card definition that allows ISA compatible DMA operation, including the Terminal Count signal
required by the standard ISA floppy disk controller.
Only one socket at a time should be enabled for DMA transfer because the ISA bus DMA handshake is shared
between both socket interfaces. Note: the original VG-468 pins 67 and 68 are defined as GPIO. The VT83C469
defines these pins as HDACK# and HTC.
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