Intel 855GME User Manual

168
Intel
®
855GME Chipset and Intel
®
6300ESB ICH Embedded Platform Design Guide
Integrated Graphics Display Port
The setup margin and the hold margin for a particular design depends on the values of the data
valid times and the data setup and hold times on both the driver and the receiver sides. However,
available margins are not absolute values. Any skew due to routing and loading differences, any
coupling differences in the parallel traces, and any effects of SSO (ISI, ground bounce, etc.) shall
be accounted for in the timing budget as they reduce the total available margin for the design.
All numbers in this table are from the 82855GME specification documents that are applicable for
this interface. For third party receiver devices, refer to appropriate third party vendor
specifications.
6.4 DVOB and DVOC Port Flexible (Modular) Design
The GMCH supports flexible design interfaces described in this section.
6.4.1 DVOB and DVOC Module Design
The 82855GME supports a DVO module design connected to the GMCH through a generic
connector. Simulation method is the same as in Section 6.3.4. Lengths L1 and L2 are determined
by simulation as L1 = 4 inches and L2 = 2 inches. Refer to Figure 81 for the generic connector
parasitic model.
Figure 79. Driver-Receiver Waveforms Relationship Specification
Data1 Data2
Data3
Data4
tDSu tDh
Data1 Data2
Data3
Data4
tDVb
tDVa
Driver
Strobe
Driver
Data
Receiver
Strobe
Receiver
Data
Clock Delay
Data Delay
Table 54. Allowable Interconnect Skew Calculation
Component Skew Element Symbol Setup Hold Units
Driver Data Valid before Strobe tDVb 570 ps
Data Valid after Strobe tDVa 770 ps
Interconnect Allowable Skew Vendor Specific Vendor Specific ps
Receiver Data Setup to Strobe tDSu Vendor Specific ps
Data Hold from Strobe tDh Vendor Specific ps

Intel 855GME Specifications

General

Brand	Intel
Model	855GME
Category	Computer Hardware
Language	English