AD9880SLASHPCB datasheet(39/64 Pages) AD

39 / 64 page

AD9880

Rev. 0 | Page 39 of 64

0x0D

7-0

Blue Channel Offset

These eight bits are the blue channel offset control.

The offset control shifts the analog input, resulting in

a change in brightness. Note that the function of the

offset register depends on whether clamp feedback is

enabled (Register 0x1C, Bit 7 = 1).

If clamp feedback is disabled, the offset register bits

control the absolute offset added to the channel. The

offset control provides a +127/−128 LSBs of adjust-

ment range, with 1 LSB of offset corresponding to

1 LSB of output code. If clamp feedback is enabled

these bits provide the relative offset (brightness) from

the offset adjust in the previous register. The power-up

default is 0x80.

SYNC

0x0E

7-0

Sync Separator

Selects the max Hsync pulse width for composite sync

separation. Power-down default is 0x20.

0x0F

7-2

SOG Comparator Threshold Enter

The enter level for the SOG slicer. Must be < than exit

level (Register 0x10). The power-up default is 0x10.

0x10

7-2

SOG Comparator Threshold Exit

The exit level for the SOG slicer. Must be > enter level

(Register 0x0F). The power-up default is 0x10.

0x11

Hsync Source

0 = Hsync, 1 = SOG. The power-up default is 0. These

selections are ignored if Register 0x11, Bit 6 = 0.

0x11

Hsync Source Override

0 = auto Hsync source, 1 = manual Hsync source.

Manual Hsync source is defined in Register 0x11,

Bit 7. The power-up default is 0.

0x11

Vsync Source

0 = Vsync, 1 = Vsync from SOG. The power-up

default is 0. These selections are ignored if Register

0x11, Bit 4 = 0.

0x11

Vsync Source Override

0 = auto Vsync source, 1 = MANUAL Vsync source.

Manual Vsync source is defined in Register 0x11,

Bit 5. The power-up default is 0.

0x11

Channel Select

0 = Channel 0, 1 = Channel 1. The power-up default is

0. These selections are ignored if Register 0x11,

Bit 2 = 0.

0x11

Channel Select Override

0 = auto channel select, 1 = manual channel select.

Manual channel select is defined in Register 0x11,

Bit 3. The power-up default is 0.

0x11

Interface Select

0 = analog interface, 1 = digital interface. The power-

up default is 0. These selections are ignored if

0x11

Interface Select Override

0 = auto interface select, 1 = manual interface select.

Manual interface select is defined in Register 0x11,

Bit 1. The power-up default is 0.

0x12

Input Hsync Polarity

0 = active low, 1 = active high. The power-up default is

1. These selections are ignored if Register 10x2,

Bit 6 = 0.

0x12

Hsync Polarity Override

0 = auto Hsync polarity, 1 = manual Hsync polarity.

Manual Hsync polarity is defined in Register 0x11,

Bit 7. The power-up default is 0.

0x12

Input Vsync Polarity

0 = active low, 1 = active high. The power-up default is

1. These selections are ignored if Register 0x11,

Bit 4 = 0.

0x12

Vsync Polarity Override

0 = auto Vsync polarity, 1 = manual Vsync polarity.

Manual Vsync polarity is defined in Register 0x11,

Bit 5. The power-up default is 0.

COAST AND CLAMP CONTROLS

0x12

Input Coast Polarity

0 = active low, 1 = active high. The power-up default

is 1.

0x12

Coast Polarity Override

0 = auto Coast polarity, 1 = manual Coast polarity.

The power-up default is 0.

0x12

Coast Source

0 = internal Coast, 1 = external Coast. The power-up

default is 0.

0x12

Filter Coast Vsync

0 = use raw Vsync for Coast generation, 1 = use

filtered Vsync for Coast generation The power-up

default is 1.

AD9880/PCB Datasheet(PDF) 39 Page - Analog Devices

AD9880/PCB Datasheet(HTML) 39 Page - Analog Devices

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