CH7003B Datasheet, PDF (5/50 Pages) List of Unclassifed Manufacturers – Digital PC to TV Encoder

CHRONTEL
CH7003B
Table 1. Pin Description (continued)
44-Pin
PLLC
26
44-Pin
TQFP
20
Type
Out
Symbol
CVBS/B
23
17
Out
CSYNC
32
26
In/Out
SD
33
27
In
SC
35
29
In
ADDR
40
34
Power AGND
37
31
Power AVDD
31
25
Power
VDD
29, 25 19,23 Power
GND
44, 36,
22, 11
42, 34,
24, 14
5,16,
30,38
8, 18,
28, 36
Power
Power
DVDD
DGND
N/A
N/A
Out
R
N/A
N/A
Out
G
N/A
N/A
Out
B
Description
Composite Video Output
A 75 Ω termination resistor with short traces should be attached between
CVBS and ground for optimum performance. In normal operating modes
other than SCART, this pin outputs the composite video signal. In SCART
mode, this pin outputs the blue signal.
Composite Sync Output
A 75 Ω termination resistor with short traces should be attached between
CSYNC and ground for optimum performance. In SCART mode, this pin
outputs the composite sync signal.
Serial Data (External pull-up required)
This pin functins as SD, the serial data pin of the I²C interface port (see the
I ²C Port Operation section for details).
Serial Clock (Internal pull-up)
This pin functions as the serial clock pin of the I²C interface port (see the
I ²C Port Operation section for details).
I²C Address Select (Internal pull-up)
This pin is the I²C Address Select, which corresponds to bits 1 and 0 of the
I²C device address (see the I ²C Port Operation section for details), creating
an address selection as follows:
ADDR I2C Address Selected
1
1110101 = 75H = 117
0
1110110 = 76H = 118
Analog ground
These pins provide the ground reference for the analog section of CH7003,
and MUST be connected to the system ground, to prevent latchup.
Analog Supply Voltage
These pins supply the 5V power to the analog section of the CH7003.
DAC Power Supply
These pins supply the 5V power to CH7003’s internal DACs.
DAC Ground
These pins provide the ground reference for CH7003’s internal DACs.
Digital Supply Voltage
These pins supply the 3.3V power to the digital section of CH7003.
Digital Ground
These pins provide the ground reference for the digital section of CH7003,
and MUST be connected to the system ground to prevent latchup.
R (Red) Component Output
This pin provides the analog Red component of the digital RGB input in the
RGB Pass-Through mode.
G (Green) Component Output
This pin provides the analog Green component of the digital RGB input in
the RGB Pass-Through mode.
B (Blue) Component Output
This pin provides the analog Blue component of the digital RGB input in the
RGB Pass-Though mode.
201-0000-023 Rev 4.1, 8/2/99
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