EWIXP420ABBT Intel, EWIXP420ABBT Datasheet - Page 38

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EWIXP420ABBT

Manufacturer Part Number
EWIXP420ABBT
Description
Manufacturer
Intel
Datasheet

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

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3.6.1
3.6.2
3.7
3.7.1
Table 9.
Intel
Hardware Design Guidelines
38
®
IXP42X Product Line of Network Processors and IXC1100 Control Plane Processor
Pull-Ups and Pull-Downs
The I
“The external pull-up devices connected to the bus lines must be adapted to
accommodate the shorter maximum permissible rise time for the Fast-mode I
For bus loads up to 200 pF, the pull-up device for each bus line can be a resistor; for
bus loads between 200 pF and 400 pF, the pull-up device can be a current source
(3 mA max.) or a switched resistor circuit. The actual value of the pull-up is system
dependent and a guide is presented in the I
maximum and minimum resistors to use when the system is intended for standard or
fast-mode I
Layout Notes
The maximum switching frequency of the PWM signals is 400 kHz. Therefore, layout
and routing considerations are not overly stringent; however, for best results, it is
recommended to adhere to standard layout practices.
Separate the physical routing of the data and clock signals and ensure that lines are
not routed near other potential noise sources, such as switching regulators or signals
with high switching frequencies.
USB Interface
This section describes guidelines to interface the IXP42X product line and IXC1100
control plane processors’ USB device controller to an USB connector.
The processors’ USB is integrated, USB 1.1-compliant and supports all standard device
requests issued by any USB host controller. It is an USB device-only controller. The
interface supports full-speed operation and 16 endpoints and includes an integrated
transceiver.
There are:
General USB routing guidelines can be found in
page
Revision 1.1.
Signals
Signals
Note:
• Six isochronous endpoints (three input and three output)
• One control endpoint
• Three interrupt endpoints
• Six bulk endpoints (three input and three output)
USB_DNEG
USB_DPOS
2
67. For more detailed information, see the Universal Serial Bus Specification,
Name
C-Bus Specification, available from Philips Semiconductors*, states:
Intel
For explanations of the
®
2
IXP42X product line and IXC1100 control plane processors—General Hardware Design
C bus devices.”
Type*
I/O
I/O
Type
Positive signal of the differential USB receiver/driver.
Negative signal of the differential USB receiver/driver.
column abbreviations, see
2
C-Bus Specification on determining the
Section 6.3.3, “USB Considerations” on
Description
Table 21 on page
Document Number: 252817-008US
81.
Considerations
December 2007
2
C-bus.