82845GL datasheet(33/193 Pages) INTEL

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Intel® 82845G/82845GL/82845GV GMCH Datasheet

Signal Description

DVOBC_INTR#

AGP

DVOBC Interrupt: This signal may be used as an interrupt input for either of

the multiplexed DVO devices.

DVOC_FLDSTL

AGP

TV Field and Flat Panel Stall Signal: This input can be programmed to be

either a TV Field input from the TV encoder or Stall input from the flat panel.

When used as a Field input, it synchronizes the overlay field with the TV

encoder field when the overlay is displaying an interleaved source. When

used as the Stall input, it indicates that the pixel pipeline should stall one

horizontal line. The polarity is programmable for both modes and the input

may be disabled completely.

MI2C_CLK

I/O AGP

MI2C_CLK: The specific function of this signal is I2C_CLK for a multiplexed

digital display. This signal is tri-stated during a hard reset.

MI2C_DATA

I/O

AGP

MI2C_DATA: The specific function of this signal is I2C_DATA for a

multiplexed digital display. This signal is tri-stated during a hard reset.

MDVI_CLK

I/O

AGP

MDVI_CLK: The specific function is DVI_CLK (DDC) for a multiplexed digital

display connector. This signal is tri-stated during a hard reset.

MDVI_DATA

I/O

AGP

MDVI_DATA: The specific function of this signal is DVI_DATA (DDC) for a

multiplexed digital display connector. This signal is tri-stated during a hard

reset.

MDDC_CLK

I/O

AGP

MDDC_CLK: This signal may be used as the DDC_CLK for a secondary

multiplexed digital display connector. This signal is tri-stated during a hard

reset.

MDDC_DATA

I/O AGP

MDDC_DATA: This signal may be used as the DDC_Data for a secondary

multiplexed digital display connector. This signal is tri-stated during a hard

reset.

ADDID[7:0]

I/O

AGP

ADD Card ID: These signals will be strapped on the ADD card for software

identification purposes. These signals may need pull-up or pull-down

resistors in a DVO device down scenario.

Name

Type

Description

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