ADV601JS Analog Devices, ADV601JS Datasheet - Page 24

• Manufacturer Part Number: ADV601JS
• Description: Low Cost Multiformat Video Codec
• Manufacturer: Analog Devices

ADV601
Video Formats — Gray Scale Video
The Gray Scale video format requires 4:0:0 data (up to 12 bits)
be transmitted over a one “lane” 8- to 12-bit physical interface.
A video clock (typically 27 MHz) is transmitted along with the
data. This clock is synchronous with the data and runs at twice
the transfer rate of the interface. The color space is Gray Scale.
Because the ADV601 internal processing is not dependent on
color space, Gray Scale data is processed in the same manner as
data in other color spaces.
VCLK is driven with a 24.54 MHz–29.5 MHz, 50% duty cycle
clock which is synchronous with the video data. Video data is
clocked on the second rising edge of the VCLK signal.
These video formats require external synchronization and
blanking signals to accompany digital video. These signals are
VSYNC, HSYNC, and FIELD. In general, when the ADV601
is configured as an encoder, these signals will all be inputs.
When the ADV601 is configured as a decoder, these signals will
be outputs. There are special cases for this format described in
Table XII.
HSYNC, VSYNC, and FIELD
Functionality for Gray Scale
Format
Encode Mode (video data is input
to the chip)
Decode Mode (video data is output
from the chip)
Video Formats — Multiplexed Philips Video
The ADV601 supports a hybrid mode of operation that is a cross
between standard dual lane Philips and single lane CCIR-656. In
this mode, video data is multiplexed in the same fashion in CCIR-656,
but the values 0 and 255 are not reserved as signaling values. In-
stead, external HSYNC and VSYNC pins are used for signaling
and video synchronization. VCLK may range up to 29.5 MHz.
HSYNC, VSYNC and FIELD
Functionality for Multiplexed
Philips
Encode Mode (video data is input
to the chip)
Decode Mode (video data is output
from the chip)
Table XI. Philips Multiplexed Video Master and Slave Modes HSYNC, VSYNC, and FIELD Functionality
Table XII. Gray Scale Video Master and Slave Modes HSYNC, VSYNC and FIELD Functionality
The ADV601 completely manages the generation
Master Mode (HSYNC, VSYNC,
CREF and FIELD Are Outputs)
The ADV601 completely manages the generation and
timing of these pins. The device driving the ADV601
video interface must use these outputs to remain in
sync with the ADV601. It is expected that this com-
bination of modes would not be used frequently.
and timing of these pins.
Master Mode (HSYNC, VSYNC
and FIELD Are Outputs)
The ADV601 completely manages the generation and
timing of these pins. The device driving the ADV601
video interface must use these outputs to remain in
sync with the ADV601. It is expected that this com-
bination of modes would not be used frequently.
The ADV601 completely manages the generation
and timing of these pins.
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Video Formats—References
For more information on video interface standards, see the
following reference texts.
• For the definition of CCIR-601:
• For the definition of CCIR-656:
VCLK is driven with up to a 29.5 MHz 50% duty cycle clock
synchronous with the video data. Video data is clocked on the
rising edge of the VCLK signal. The functionality of HSYNC,
VSYNC, and FIELD pins is dependent on three programmable
modes of the ADV601: Master-Slave Control, Encode-Decode
Control, and 525-625 Control. Table XI summarizes the func-
tionality of these pins in various modes.
1992 – CCIR Recommendations RBT series Broadcasting Service
(Television) Rec. 601-3 Encoding Parameters of digital television
for studios, page 35, September 15, 1992.
1992 – CCIR Recommendations RBT series Broadcasting Service
(Television) Rec. 656-1 Interfaces for digital component video
signals in 525 and 626 line television systems operating at the
4:2:2 level of Rec. 601, page 46, September 15, 1992.
Slave Mode (HSYNC, VSYNC,
CREF and FIELD Are Inputs)
These pins are used to control the
blanking of video and sequencing.
These pins are used to control the
blanking of video and sequencing.
Slave Mode (HSYNC, VSYNC
and FIELD Are Inputs)
These pins are used to control the
blanking of video and sequencing.
These pins are used to control the
blanking of video and sequencing.
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