80333 datasheet(59/75 Pages) INTEL

59 / 75 page

80333

Datasheet

Intel® 80333 I/O Processor Datasheet

May 2005

Order Number: 305433, Revision: 002

4.4

Targeted AC Specifications

4.4.1

Clock Signal Timings

Table 25.

PCI Clock Timings

Symbol

Parameter

PCI-X 133

PCI-X 100

PCI-X 66

PCI 66

PCI 33

Units

Notes

Min.

Max

Min.

Max

Min.

Max

Min.

Max

Min.

Max

TF1

PCI clock Frequency

100

133

100

MHz

TC1

PCI clock Cycle Time - Avg.

Absolute Minimum

7.5

1010

151520

7.375

9.875

14.8

29.7

3,4

TCH1

PCI clock High Time

TCL1

PCI clock Low Time

TSR1

PCI clock Slew Rate

1.5

V/ns

PCI Spread Spectrum Requirements

fmod

PCI clock modulation

frequency

KHz

fspread

PCI clock frequency spread

-1

Notes:

Clock frequency may not change beyond spread-spectrum limits except while RSTIN# is asserted or PWRGD

deasserted.

This slew rate must be met across the minimum peak-to-peak portion of the clock waveform.

The minimum clock period must not be violated for any single clock cycle, i.e., accounting for all system jitter.

Clock jitter class 2, per PCI-X Electrical and Mechanical Rev 2.0a specification

Table 26.

DDR Clock Timings

Symbol

Parameter

DDR-II 400

DDR333

Units

Notes

Minimum

Maximum

Minimum

Maximum

TF2

DDR SDRAM clock Frequency

200

167

MHz

TC2

DDR SDRAM clock Cycle Time

5.0

6.0/7.5(1)

TCH2

DDR SDRAM clock High Time

2.15

2.7/3.37(1)

TCL2

DDR SDRAM clock LowTime

2.15

2.7/3.37(1)

TCS2

DDR SDRAM clock Period Stability

350

Tskew2

DDR SDRAM clock skew for any differential

clock pair (M_CK[2:0] - M_CK[2:0]#)

100

Tskew3

DDR SDRAM clock skew for any clock pair

and any system memory strobe (M_CK -

DQS).

-285

285

-285

285

Notes:

CL = 2.5/2.0.

This specification applies for writes only; that is, when the 80333 is driving the strobes as well as the clocks. Refer to the

JEDEC specification for an explanation of strobe to clock timing for DDR reads.

80333 Datasheet(PDF) 59 Page - Intel Corporation

80333 Datasheet(HTML) 59 Page - Intel Corporation

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