adv611 Analog Devices, Inc., adv611 Datasheet - Page 35

• Manufacturer Part Number: adv611
• Description: Closed Circuit Tv Digital Video Codec
• Manufacturer: Analog Devices, Inc.

CCIR-656 Video Format Timing
The diagrams in this section show transfer timing for pixel (YCrCb), line (horizontal), and frame (vertical) data in CCIR-656 video
mode. All output values assume a maximum pin loading of 50 pF. Note that in timing diagrams for CCIR-656 video, the label CTRL
indicates the VSYNC, HSYNC, and FIELD pins.
Parameter
t
t
t
t
Parameter
t
t
t
t
REV. 0
VDATA_DC_D
VDATA_DC_OH
CTRL_DC_D
CTRL_DC_OH
VDATA_EC_S
VDATA_EC_H
CTRL_EC_D
CTRL_EC_OH
(VCLK2 = 1)
(O) VCLKO
(O) VDATA
(VCLK2 = 0)
(I) VDATA
(O) CTRL
(O) VCLKO
(O) CTRL
(I) VCLKO
(I) VCLK
(I) VCLK
NOTE:
USE VCLK FOR CLOCKING VIDEO-ENCODE OPERATIONS AND USE VCLKO FOR CLOCKING VIDEO-DECODE OPERATIONS.
DO NOT TRY TO USE EITHER CLOCK FOR BOTH ENCODE AND DECODE.
t
VDATA DC OH
t
VALID
VALID
CTRL DC OH
Description
VDATA Signals, Decode CCIR-656 Mode, Delay
VDATA Signals, Decode CCIR-656 Mode, Output Hold
CTRL Signals, Decode CCIR-656 Mode, Delay
CTRL Signals, Decode CCIR-656 Mode, Output Hold
Table XXI. CCIR-656 Video—Encode Pixel (YCrCb) Timing Parameters
Description
VDATA Bus, Encode CCIR-656 Mode, Setup
VDATA Bus, Encode CCIR-656 Mode, Hold
CTRL Signals, Encode CCIR-656 Mode, Delay
CTRL Signals, Encode CCIR-656 Mode, Output Hold
Table XX. CCIR-656 Video—Decode Pixel (YCrCb) Timing Parameters
Figure 24. CCIR-656 Video—Decode Pixel (YCrCb) Transfer Timing
Figure 25. CCIR-656 Video—Encode Pixel (YCrCb) Transfer Timing
ASSERTED
t
CTRL EC OH
t
VDATA DC D
t
VALID
CTRL DC D
t
t
VCLKO D1
VCLKO D0
Figure 23. Video Clock Timing
t
CTRL EC D
t
VCLK CYC
–35–
VALID
VALID
t
VDATA EC S
ASSERTED
VALID
t
VDATA EC H
Min
N/A
4
N/A
5
Min
2
5
N/A
20
ADV611/ADV612
VALID
VALID
Max
14
N/A
11
N/A
Max
N/A
N/A
33
N/A
Units
ns
ns
ns
ns
Units
ns
ns
ns
ns