FPD85308 datasheet(13/31 Pages) NSC

13 / 31 page

Functional Description (Continued)

TABLE 2. FPD85308 Programmable Register Definition (Continued)

Control

Registers

EEPROM

Address

The control registers provide mode setting information to the input and output interfaces.

Output

Enable/Polarity

Control

[0]

OCLK Enable (1-On, 0-TRI-STATE)

[1]

OCLK Polarity (1-Per Datasheet, 0-Inverted)

[2]

ECLK Enable (1-On, 0-TRI-STATE)

[3]

ECLK Polarity (1-Per Datasheet, 0-Inverted)

[4]

ORGB/OSP/OPOL Enable (1-On, 0-TRI-STATE)

[5]

ERGB/ESP/EPOL Enable (1-On, 0-TRI-STATE)

[7:6]

OSP/ESP Control

[7,6] Output

0,0 Lowest Drive

0,1 ..

1,0 ..

1,1 Highest Drive

Output Drive

Control

[1:0]

OCLK Control

[3:2]

ECLK Control

[5:4]

ORGB/OPOL Control

[7:6]

ERGB/EPOL Control

[A,B]

Output

0,0

Lowest Drive

0,1

1,0

1,1

Highest Drive

CD Size

[7:0]

= # Data/CD

This number defines how many contiguous pixels are output on the odd and even data

channels for the single port CD interface. CD sizes of up to 128 pixel (384 channel) are

supported. A minimum value of 20H must be programmed regardless of CD interface

used.

Input Format

Control

[0]

Fix Vertical

“0” = Vertical position dependent on first ENAB from VSYNC

“1” = Vertical position dependent on Vertical Backporch Register

[1]

Fix Horizontal

“0” = Horizontal position dependent on ENAB

“1” = Horizontal position dependent on Horizontal Backporch Register

*See

Table 1 for valid mode combinations.

[2]

Must be “0”

[3]

Enable/Disable Virtual 8-bit (8-bit input only)

“0” = Virtual 8-bit enabled (FRC)

“1” = Virtual 8-bit disabled (Truncate LSBs)

[4]

Eight/Six Bit Video

“0” = Six Bit Video

“1” = Eight Bit Video

[6:5]

Power-up Delay (TEST2 must be “0”)

“00” = Outputs active after second VSYNC

“01” = Outputs active after third VSYNC

“10” = Outputs active after fourth VSYNC

“11” = Outputs active after fifth VSYNC

[7]

White Data Generation

“0” = No white data generation

“1” = Enables white data generation during vertical blanking

FPD85308 Datasheet(PDF) 13 Page - National Semiconductor (TI)

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