gwixp425bdt Intel Corporation, gwixp425bdt Datasheet - Page 33

• Manufacturer Part Number: gwixp425bdt
• Description: Intel Xp42x Product Line Of Network Processors And Ixc1100 Control Plane Processor
• Manufacturer: Intel Corporation

3.0
Warning:
Table 5.
Datasheet
Functional Signal Descriptions
Listed in the signal definition tables — starting at
pull-up an pull-down resistor recommendations that are required when the particular enabled
interface is not being used in the application. These external resistor requirements are only needed
if the particular model of Intel
the particular interface enabled and the interface is not required in the application.
All IXP42X product line and IXC1100 control plane processors I/O pins are not 5-V tolerant.
Disabled features, within the IXP42X product line and IXC1100 control plane processors, do not
require external resistors as the processor will have internal pull-up or pull-down resistors enabled
as part of the disabled interface.
Table 5
document.
To determine which interfaces are not enabled within the IXP42X product line and IXC1100
control plane processors, see
Signal Type Definitions
Other tables in this section include:
•
•
Intel
Symbol
Table 6
Table 7
PWR
GND
N/C
OD
VO
I/O
PD
PE
Tri
ID
VI
O
H
1
0
X
L
Z
®
I
-
presents the legend for interpreting the
IXP42X Product Line of Network Processors and IXC1100 Control Plane Processor
—
—
SDRAM Interface
PCI Controller
Input pin only
Output pin only
Pin can be either an input or output
Open Drain pin
Power pin
Ground pin
Driven to Vcc
Driven to Vss
Driven to unknown state
Input is disabled
Pulled up to Vcc
Pulled to Vss
Pull-up Disabled
Output Disabled
A valid output level is driven, allowed states -- 1, 0, H, Z
Need to drive a valid input level, allowed states - 1, 0, H, Z
Pull-up Enabled, equivalent to H
Output Only/Tristatable
No Connect
Pin must be connected as described
Document Number: 252479, Revision: 005
Table 3 on page
®
signals
IXP42X product line and IXC1100 control plane processors has
signals
Description
14.
Type
Table 6 “SDRAM Interface” on page 34
field in the other tables in this section of the
March 2005
— are
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