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參數(shù)資料
| 型號(hào)： | 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(yè)數(shù)： | 79/138頁(yè) |
| 文件大小： | 723K |
| 代理商： | PD6710 |
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ISA-to-PC-Card (PCMCIA) Controllers
—
PD6710/
’
22
Datasheet
79
Bit 2
—
LED Activity Enable
This bit allows the LED_OUT* pin to reflect any activity in the card. Whenever PC Card cycles are
in process to or from a card in either socket, LED_OUT* will be active (low).
Bit 5
—
Pull-up Control
This bit turns off the pull-ups on CD2, CD1, and A_GPSTB and B_GPSTB (PD6722). Turning off
these pull-ups can be used in addition to Suspend mode to even further reduce power when cards
are inserted but no card accessibility is required. Even though power may or may not still be
applied, all pull-ups and their associated inputs will be disabled.
Bit 7:6
—
DMA Enable (PD6722 only)
On the PD6722, DMA Enable bits 6 and 7 enable the DMA operation of the PC Card socket. At
reset these bits are set to
‘
0
’
, and this is non-DMA mode. If either or both of these bits is set, the
socket is in DMA mode. The three codes that cause DMA mode also select the use of one of three
pins for the active-low -DREQ input at the PC Card interface.
For cards requiring DMA services but also needing input acknowledge functionality, or needing to
indicate the size of I/O registers within a window, or needing digital speaker or LED operation, the
selection of the -DREQ signal to the socket is made to be as flexible as possible.
10.7.3
Maximum DMA Acknowledge Delay (PD6722 only)
0
LED activity disabled.
1
LED activity enabled.
0
Pull-ups on CD2, CD1, A_GPSTB, and B_GPSTB (PD6722) are in use.
1
Pull-ups on CD2, CD1, A_GPSTB, and B_GPSTB (PD6722) are turned off.
Bit 7
Bit 6
Pin Used
0
1
-INPACK
1
0
WP/-IOIS16
1
1
BVD2/-SPKR
Register Name:
Maximum DMA
Acknowledge Delay
Index:
2Fh
Extended Index:
04h
Register Per:
socket
Register Compatibility Type:
ext.
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Maximum DMA Acknowledge Delay
RW:00000000
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