EWIXP420ABBT Intel, EWIXP420ABBT Datasheet - Page 28

• Manufacturer Part Number: EWIXP420ABBT
• Manufacturer: Intel

Specifications of EWIXP420ABBT

• Core Operating Frequency: 533MHz
• Package Type: BGA
• Pin Count: 492
• Mounting: Surface Mount
• Operating Temperature (max): 85C
• Operating Temperature (min): -40C
• Operating Temperature Classification: Industrial
• Lead Free Status / Rohs Status: Compliant

3.2.3
Figure 6.
3.2.4
Intel
Hardware Design Guidelines
28
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IXP42X Product Line of Network Processors and IXC1100 Control Plane Processor
The user-defined bit-field can be used in many ways. For example, this field could be
used for board-revision identification; a series of board revisions may be made over the
course of development. To indicate a particular board revision, one of the 16 possible
values can be encoded using hardware configuration as stated above. Another potential
use for this field would be to predefine a set of values to indicate a particular board
configuration — for example, one with a different set of devices and memory map.
Many other creative options, not identified in this document, are possible.
Flash Interface
Figure 6
flash used in the block diagram is the Intel
28F128J3D. The boot ROM address space supports up to 16-Mbyte (128-Mbit) of flash.
The boot ROM maps to the Intel XScale
(reset), the Intel
fetch and execute instructions from address 0x00.
Expansion Bus Flash Interface
See Intel StrataFlash
Conversion Guide - Application Note 835 for more detailed information. For information
on design with Intel StrataFlash
Embedded Memory (P30) to Intel
IXC1100 Control Plane Processor Design Guide - Application Note 832. For information
on migrating from J3 to P30 Intel StrataFlash
StrataFlash
- Application Note 812.
SRAM Interface
Figure 7
and IXC1100 control plane processors’ expansion bus.
Intel
illustrates how the boot ROM is connected through the expansion bus. The
shows a typical connection for SRAM connected on the IXP42X product line
and IXC 1100 Control
Plane Processors
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Product Line
IXP42X product line and IXC1100 control plane processors—General Hardware Design
Memory J3 to Intel StrataFlash
EX_ADDR[23:0]
EX _DATA[15:0]
IXP42X
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EX _CS_N0
EX _WR_N
EX_RD_N
IXP42X product line and IXC1100 control plane processors begin to
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memory (J3) to Intel
®
®
Embedded Memory (P30), see the Intel StrataFlash
3.3V
IXP42X Product Line of Network Processors and
10K
®
Processor physical address 0x00. At startup
RST#
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Embedded Flash Memory (J3 v.D)
Embedded Memory (P30) Migration Guide
Embedded Flash Memory (J3 v.D)
Embedded Memory (P30), see the Intel
Intel Flash Interface
Document Number: 252817-008US
DQ[15:0]
A[23:0]
OE #
VPEN #
CE0
WE#
CE1
CE2
RP#
BYTE
#
B-01
Considerations
December 2007
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