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參數(shù)資料
| 型號： | PD6710 |
| 廠商： | Intel Corp. |
| 英文描述： | ISA-to-PC-Card (PCMCIA) Controllers |
| 中文描述： | ISA -到- PC卡（PCMCIA）的控制器 |
| 文件頁數(shù)： | 78/138頁 |
| 文件大小： | 723K |
| 代理商： | PD6710 |
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PD6710/
’
22
—
ISA-to-PC-Card (PCMCIA) Controllers
78
Datasheet
10.7.1
Data Mask 0
–
1
Data Mask 0
is the mask register for I/O Map 0. For each bit set in the Data Mask Select 0 field,
the corresponding data bit will not be driven when the host addresses PC Card I/O addresses in the
I/O Map 0 range. If this register is set to 00h, then all data bits will be driven from the PC Card to
the ISA bus (this is the reset condition). If any bits are set to
‘
1
’
, accesses to the I/O Map 0 range of
I/O on the PC Card will be forced to 8-bit operation on the ISA side. If, for example, I/O Map 0
registers are set for the range 3F7h to 3F7h, I/O Map 1 registers are set for the range 3F0h to 3F6h,
Data Mask Select 0 is set to 7Fh, and a floppy drive is the PC Card device, then the conflict
between the floppy address 3F7h and the hard disk register at 3F7h would not cause a conflict on
the ISA bus
—
the floppy change bit would be correctly presented to the host.
The
Data Mask 1
register operates the same as the
Data Mask 0
register but acts on I/O addresses
in the range indicated by the I/O Map 1 registers.
10.7.2
Extension Control 1 (PD6722 only, formerly DMA Control)
Bit 0
—
V
CC
Power Lock
This bit can be used to prevent card drivers from overriding the Socket Services
’
task of controlling
power to the card, thus preventing situations where cards are powered incorrectly.
Bit 1
—
Auto Power Clear Disable
Register Name:
Data Mask 0
–
1
Index:
2Fh
Bit 7
Extended Index:
01h, 02h
Register Per:
socket
Register Compatibility Type:
ext.
Bit 1
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 0
Data Mask Select 0
–
1
RW:00000000
Register Name:
Extension Control 1
Index:
2Fh
Extended Index:
03h
Register Per:
socket
Register Compatibility Type:
ext.
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
DMA Enable
(PD6722)
Pull-up
Control
Reserved
LED Activity
Enable
Auto Power
Clear Disable
V
CC
Power
Lock
RW:00
RW:0
RW:00
RW:0
RW:0
RW:0
0
The V
CC
Power bit (bit 4 of
Power Control
register) is not locked.
1
The V
CC
Power bit (bit 4 of
Power Control
register) cannot be changed by software.
0
The V
CC
Power bit (bit 4 of
Power Control
register) is reset to
‘
0
’
when the card is removed.
1
The V
CC
Power bit (bit 4 of
Power Control
register) is not affected by card removal.
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