adv611 Analog Devices, Inc., adv611 Datasheet - Page 30

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

ADV611/ADV612
APPLYING THE ADV611/ADV612
This section includes the following topics:
• Using the ADV611/ADV612 in computer applications
• Using the ADV611/ADV612 in stand-alone applications
• Configuring the host interface for 16- or 32-bit data paths
• Connecting the video interface to popular video encoders and
• Getting the most out of the ADV611/ADV612
The following Analog Devices products should be considered in
ADV611/ADV612 designs:
• ADV7175/ADV7176—Digital YUV to analog composite
• AD722—Analog RGB to analog composite video encoder
• AD1843—Audio codec with embedded video synchronization
• ADSP-21xx—Family of fixed-point digital signal processors
• AD8xxx—Family of video operational amplifiers
decoders
video encoder
NOTE:
DECODE
ADV611/ADV612 FOR HOST ADDRESSES
0X4000,0000 THROUGH 0X4000,0013
DECODE
HOST BUS
1
2
ASSERTS CS
IS HOST-SPECIFIC
D16–D23
D24–D31
D8–D15
D0–D7
A28
A29
A30
A31
WR
~
RD
A2
A3
ON THE
Figure 15. A Suggested PC Application Design
DECODE
DECODE
1
2
ADR0
ADR1
DQ0–DQ7
DQ8–DQ15
DQ16–DQ23
DQ24–DQ31
CS
RD
WR
STATS R
LCODE
ACK
FIFO SRQ
FIFO ERR
FIFO STP
BE0–BE1
BE2–BE3
HIRQ
ADV611/ADV612
–30–
Using the ADV611/ADV612 in Computer Applications
Many key features of the ADV611/ADV612 were driven by the
demanding cost and performance requirements of computer
applications. The following ADV611/ADV612 features provide
key advantages in computer applications, such as the one in
Figure 15.
• Host Interface
• Low Cost External DRAM
The 512 double word FIFO provides necessary buffering of
compressed digital video to deal with PCI bus latency.
Unlike many other real-time compression solutions, the
ADV611/ADV612 does not require expensive external
SRAM transform buffers or VRAM frame stores.
VDATA [0–7]
D0–D15
VCLKO
A0–A8
VCLK
RAS
CAS
WE
27MHz PAL OR NTSC
TOSHIBA TC514265DJ/DZ/DFT-60
NEC
NEC
HITACHI
ANY DRAM USED WITH THE ADV611/ADV612
MUST MEET THE MINIMUM SPECIFICATIONS
OUTLINED FOR THE HYPER MODE DRAMS
LISTED
HM514265CJ-60
PD424210ALE-60
PD42S4210ALE-60
COMPOSITE VIDEO INPUT
DQ1–DQ16
WEL
WEH
Y[0–7]
A0–A8
RAS
CAS
OE
LLC
(256K
SAA7111
24.576MHz
XTAL
XTAL
DRAM
16-BIT)
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