TABLE 2. FPD85310 Programmable Register Definition (Continued)

Control

Registers

EEPROM

Address

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

Control Register

(5 bits)

[0]. Output polarity - defines active high or active low output

“0” = normal output (active high)

“1” = inverted output (active low)

[1]. Toggle circuit enable/disable

“0” = Normal GPO output; Toggle circuitry disabled

“1” = Toggle circuitry enabled; output transitions after 1 clock (pixel counter) whenever

programmed rising edge of GPO occurs.

When “toggle circuit” is enable, the value of “Horizontal Duration” register programming

determine; “001h”

∼’1 H-line-1’ = 1 H-line toggling, ’1 H-line’∼’2 H-line-1’ = 2 H-line

toggling, etc. up to 11 bits are set.

[2].

Automatic Frame Size Detection

GPO [0:1]

“0” = Normal Operation

“1” = Used with toggle circuitry to create a “continuous” REV signal. NOTE: The value

of the vertical duration register is overwritten.

GPO [2:8]

“0” = Normal Operation

“1” = Early Start capability (Vertical Duration = “00” is N/A, See

Table 5)

The value in the Vertical Start Register is subtracted from the total number of

lines/frame (auto-detected) to determine the Vertical Start position.

(It needs a full frame after RSTZ, then started with 1 frame delayed to compare to the

other GPOs)

[4:3]

“00” = Select GPO# as programmed. (no combination function)

“01” = Select GPO# “ANDed” with GPO#-1

“10” = Select GPO# “ORed” with GPO#-1

“11” = Select GPO# and GPO#-1 on alternating frames

and GPO0 cannot be programmed by non-existing of “GPO-1”)

(Examples) GPO#-1 AND GPO#, (GPO#-2 and GPO#-1) OR GPO# and etc.

TABLE 3. EEPROM Memory Map

Address

Data (# bits)

Default Values

0-7F

DDC VESA DATA

(HEX)

80

programmed to 00H for EEPROM auto detect

00

82,81

gpo [8]_pstart_reg (10)

00,01

84,83

gpo [8]_pcount_reg (11)

02,2D

86,85

gpo [8]_lstart_reg (11)

00,01

88,87

gpo [8]_lcount_reg (11)

03,02

89

gpo [8]_cont_reg (5)

00

8B,8A

gpo [7]_pstart_reg (10)

00,14

8D,8C

gpo [7]_pcount_reg (11)

01,E0

8F,8E

gpo [7]_lstart_reg (11)

00,02

91,90

gpo [7]_lcount_reg (11)

03,00

92

gpo [7]_cont_reg (5)

01

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