AD9380SLASHPCB datasheet(39/60 Pages) AD

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AD9380

Rev. 0 | Page 39 of 60

SYNC

0x0E—Bits[7:0] Sync Separator

Selects the maximum HSYNC pulse width for composite sync

separation. Power-down default is 0x20.

0x0F—Bits[7:2] SOG Comparator Threshold Enter

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

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

0x10—Bits[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—Bit[7] HSYNC Source

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

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

0x11—Bit[6] 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—Bit[5] 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—Bit[4] 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—Bits[3] 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—Bit[2] 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—Bits[1] Interface Select

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

is 0. These selections are ignored if Register 0x11, Bit 0 = 0.

0x11—Bit[0] 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—Bit[7] 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—Bits[6] 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—Bit[5] 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—Bit[4] 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—Bit[3] Input Coast Polarity

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

0x12—Bit[2] Coast Polarity Override

0 = auto-coast polarity, 1 = manual coast polarity. The power-

up default is 0.

0x12—Bit[1] Coast Source

0 = internal coast, 1 = external coast. The power-up default is 0.

0x12—Bit[0] Filter Coast VSYNC

0 = use raw VSYNC for coast generation, 1 = use filtered

VSYNC for coast generation The power-up default is 1.

0x13—Bits[7:0] Precoast

This register allows the internally generated coast signal to be

applied prior to the VSYNC signal. This is necessary in cases

where pre-equalization pulses are present. The step size for this

control is one HSYNC period. For precoast to work correctly, it

is necessary for both the VSYNC filter (0x21, Bit 5) and sync

processing filter (0x21 Bit 7) to be either enabled or disabled.

The power-up default is 0.

0x14—Bits[7:0] Postcoast

This register allows the internally generated coast signal to be

applied following the VSYNC signal. This is necessary in cases

where post-equalization pulses are present. The step size for this

control is one HSYNC period. For postcoast to work correctly,

it is necessary for both the VSYNC filter (0x21, Bit 5) and sync

processing filter (0x21, Bit 7) to be either enabled or disabled.

The power-up default is 0.

STATUS OF DETECTED SIGNALS

0x15—Bit[7] HSYNC 0 Detection Bit

This bit is used to indicate when activity is detected on the

HSYNC 0 input pin. If HSYNC is held high or low, activity is

not detected. The sync processing block diagram shows where

this function is implemented. 0 = HSYNC 0 not active.

1 = HSYNC 0 is active.

AD9380/PCB Datasheet(PDF) 39 Page - Analog Devices

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