GWIXP425BCT datasheet(96/134 Pages) INTEL

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Intel® IXP42X Product Line of Network Processors and IXC1100 Control Plane Processor

March 2005

Datasheet

Document Number: 252479, Revision: 005

5.5.2.2

USB Interface

For timing parameters, see the USB 1.1 specification. The IXP42X product line and IXC1100

control plane processors’ USB 1.1 interface is a device or function controller only. The IXP42X

product line and IXC1100 control plane processors’ USB v 1.1 interface cannot be line-powered.

Table 45.

PCI Bus Signal Timings

Symbol

Parameter

33 MHz

66 MHz

Units

Notes

Min.

Max.

Min.

Max.

Tclk2outb

Clock to output for all bused

signals. This is the PCI_AD[31:0],

PCI_CBE_N [3:0], PCI_PAR,

PCI_FRAME_N, PCI_IRDY_N,

PCI_TRDY_N, PCI_STOP_N,

PCI_DEVSEL_N, PCI_PERR_N,

PCI_SERR_N

2111

1, 2, 5,

7, 8

Tclk2out

Clock to output for all point-to-point

signals. This is the PCI_GNT_N

and PCI_REQ_N(0) only.

212

1, 2, 5,

7, 8

Tsetupb

Input setup time for all bused

signals. This is the PCI_AD[31:0],

PCI_CBE_N [3:0], PCI_PAR,

PCI_FRAME_N, PCI_IRDY_N,

PCI_TRDY_N, PCI_STOP_N,

PCI_DEVSEL_N, PCI_PERR_N,

PCI_SERR_N

4, 6, 7,

Tsetup

Input setup time for all point-to-

point signals. This is the

PCI_REQ_N and PCI_GNT_N(0)

only.

10, 12

4, 7, 8

Thold

Input hold time from clock.

4, 7, 8

Trst-off

Reset active-to-output float delay

5, 6, 7,

Notes:

See the timing measurement conditions.

Parts compliant to the 3.3 V signaling environment.

REQ# and GNT# are point-to-point signals and have different output valid delay and input setup

times than do bused signals. GNT# has a setup of 10 ns for 33 MHz and 5 ns for 66 MHz; REQ# has

a setup of 12 ns for 33 MHz and 5 ns for 66 MHz.

RST# is asserted and de-asserted asynchronously with respect to CLK.

All PCI outputs must be asynchronously driven to a tri-state value when RST# is active.

Setup time applies only when the device is not driving the pin. Devices cannot drive and receive

signals at the same time.

Timing was tested with a 70-pF capacitor to ground.

For additional information, see the PCI Local Bus Specification, Rev. 2.2.

GWIXP425BCT 数据表(PDF) 96 Page - Intel Corporation

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