參數(shù)資料
型號： QT0086302TME
英文描述： Controller Miscellaneous - Datasheet Reference
中文描述： 控制器雜項-數(shù)據(jù)表參考
文件頁數(shù)： 20/62頁
文件大?。?/td> 268K
代理商： QT0086302TME
82C814
Page 10
January 08, 1998
912-3000-047
Revision: 1.0
OPTi
3.3
The 82C814 CardBus Controller can be strapped to operate
in one of several different modes depending on its implemen-
tation in the system.
Strap-Selected Interface Options
Strap options are registered at chip reset time. The selection
straps are normally 10k ohm resistors engaged full-time.
The strapping possibilities are listed in Table 3-4.
Note:
For 5.0V core and PCI host interface designs that
use host PCI interrupts INTA#-D#, it may not be pos-
sible to strap the 82C814 into 5.0V mode if there is
an external pull-up on the host INTA# signal. For
these designs it is necessary to program the core
voltage to 5.0V by writing PCICFG 5Eh[4] = 1.
Table 3-4
Strap Options for 82C814 Configurations
Strap Selection
Feature
No Strap
Pulled by 10k ohm
Resistor at Reset
IRQLATCH
(PCI INTA#) Pin 11
Core Voltage Select
3.3V Core and PCI host interface
(internal pull up)
5.0V Core and PCI host interface
(external 10k ohm pull down)
PCI INTB#
Pin 12
PCI Interrupts
Use IRQ Driveback or IRQLATCH#
(internal pull down)
Provide INTA#-D#
(external 10k ohm pull up)
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