AD9882SLASHPCB datasheet(9/36 Pages) AD

9 / 36 page

REV. A

AD9882

–9–

PIN DESCRIPTIONS OF SHARED PINS BETWEEN

ANALOG AND DIGITAL INTERFACES

HSOUT

Horizontal Sync Output

A reconstructed and phase-aligned version of the

video Hsync. The polarity of this output can be

controlled via a serial bus bit. In analog interface

mode, the placement and duration are variable.

In digital interface mode, the placement and

duration are set by the graphics transmitter.

VSOUT

Vertical Sync Output

The separated Vsync from a composite signal or

a direct pass-through of the Vsync input. The

polarity of this output can be controlled via a

serial bus bit. The placement and duration in all

modes is set by the graphics transmitter.

SERIAL PORT (2-WIRE)

SDA

Serial Port Data I/O

SCL

Serial Port Data Clock

Serial Port Address Input

For a full description of the 2-wire serial register,

refer to the Control Port section on 2-Wire

Serial Control.

DATA OUTPUTS

RED

Data Output, RED Channel

GREEN

Data Output, GREEN Channel

BLUE

Data Output, BLUE Channel

The main data outputs. Bit 7 is the MSB. These

outputs are shared between the two interfaces

and behave according to which interface is active.

Refer to the sections on the two interfaces for

more information on how these outputs behave.

DATACK

Data Output Clock

Just like the data outputs, the data clock output

is shared between the two interfaces. It behaves

differently depending on which interface is active.

Refer to the sections on the two interfaces to

determine how this pin behaves.

Table II. Analog Interface Pin List

Pin Type

Mnemonic

Function

Value

Number

Analog Video

RAIN

Analog Input for Converter R

0.0 V to 1.0 V

Inputs

GAIN

Analog Input for Converter G

0.0 V to 1.0 V

BAIN

Analog Input for Converter B

0.0 V to 1.0 V

External

HSYNC

Horizontal SYNC Input

3.3 V CMOS

Sync/Clock

VSYNC

Vertical SYNC Input

3.3 V CMOS

SOGIN

Sync-on-Green Input

0.0 V to 1.0 V

Sync Outputs

HSOUT

Hsync Output (Phase-Aligned with DATACK)

3.3 V CMOS

VSOUT

Vsync Output

3.3 V CMOS

SOGOUT

Composite SYNC

3.3 V CMOS

Voltage

REFBYPASS

Internal Reference Bypass

1.25 V

Reference

MIDBYPASS

Internal Midscale Voltage Bypass

Clamp Voltages

PLL Filter

FILT

Connection for External Filter Components for Internal PLL

Power Supply

Main Power Supply

3.15 V to 3.45 V

PVD

PLL Power Supply (Nominally 3.3 V)

3.15 V to 3.45 V

VDD

Output Power Supply

2.2 V to 3.6 V

GND

Ground

0 V

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