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ADV7196A Folha de dados(PDF) 11 Page - Analog Devices

Nome de Peças ADV7196A
Descrição Electrónicos  Multiformat Progressive Scan/HDTV Encoder with Three 11-Bit DACs, 10-Bit Data Input, and Macrovision
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Fabricante Electrônico  AD [Analog Devices]
Página de início  http://www.analog.com
Logo AD - Analog Devices

ADV7196A Folha de dados(HTML) 11 Page - Analog Devices

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ADV7196A
–11–
Input/Output Configuration
Table I shows possible input/output configurations when using
the ADV7196A.
Table I.
Input Format
Output
YCrCb Progressive Scan
4:2:2
2
×
4:4:4
1
× or 2×
YCrCb HDTV
4:2:2
1
×
4:4:4
1
×
RGB Progressive Scan
4:4:4
2
×
RGB HDTV
4:4:4
1
×
Async Timing Mode
All Inputs
1
×
10
0
–80
–40
–50
–60
–70
–20
–30
–10
5
10152025
0
30
Figure 8. 2
× Interpolation Filter – Y-Channel
10
0
–80
–40
–50
–60
–70
–20
–30
–10
5
10152025
0
30
Figure 9. Interpolation Filter – CrCb Channels for 4:2:2
Input Data
10
0
–80
–40
–50
–60
–70
–20
–30
–10
5
10152025
0
30
Figure 10. Interpolation Filter – CrCb Channels for 4:4:4
Input Data
MPU PORT DESCRIPTION
The ADV7196A support a 2-wire serial (I
2C-compatible) micro-
processor bus driving multiple peripherals. Two inputs, Serial Data
(SDA) and Serial Clock (SCL), carry information between any
device connected to the bus. Each slave device is recognized by a
unique address. The ADV7196A has four possible slave addresses
for both read and write operations. These are unique addresses
for each device and illustrated in Figure 11. The LSB sets either
a read or write operation. Logic Level “1” corresponds to a read
operation while Logic Level “0” corresponds to a write opera-
tion. A1 is set by setting the ALSB pin of the ADV7196A to Logic
Level “0” or Logic Level “1.” When ALSB is set to “0,” there is
greater input bandwidth on the I
2C lines, which allows high-
speed data transfers on this bus. When ALSB is set to “1,” there
is reduced input bandwidth on the I
2C lines, which means that
pulses of less than 50 ns will not pass into the I
2C internal control-
ler. This mode is recommended for noisy systems.
1
X
1
0
1
01
A1
ADDRESS
CONTROL
SET UP BY
ALSB
READ/
WRITE
CONTROL
0
WRITE
1READ
Figure 11. Slave Address
To control the various devices on the bus the following protocol
must be followed. First the master initiates a data transfer by
establishing a Start condition, defined by a high-to-low transi-
tion on SDA while SCL remains high. This indicates that an
address/data stream will follow. All peripherals respond to the
Start condition and shift the next eight bits (7-bit address + R/
W
bit). The bits are transferred from MSB down to LSB. The
peripheral that recognizes the transmitted address responds by
pulling the data line low during the ninth clock pulse. This is
known as an acknowledge bit. All other devices withdraw from
the bus at this point and maintain an idle condition. The idle
condition is where the device monitors the SDA and SCL lines
waiting for the Start condition and the correct transmitted address.
The R/
W bit determines the direction of the data.


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