CH7004C Datasheet, PDF (5/51 Pages) List of Unclassifed Manufacturers – Digital PC to TV Encoder with Macrovision

CHRONTEL
CH7004C
Table 1. Pin Descriptions
44-Pin
PLCC
44Pin
TQFP
Type
30
24
In
28
22
Out
27
21
Out
26
20
Out
23
17
Out
32
26
In/Out
33
27
In
35
29
In
40
34
Power
37
31
Power
N/A
N/A
In/out
Symbol
Description
RSET
Y/R
C/G
CVBS/B
CSYNC
SD
SC
ADDR
AGND
AVDD
GPI 0
[3:0]
Reference Resistor
A 360 Ω resistor with short and wide traces should be attached
between RSET and ground. No other connections should be made to
this pin.
Luminance Output
A 75 Ω termination resistor with short traces should be attached
between Y and ground for optimum performance. In normal operating
modes other than SCART, this pin outputs the luma video signal. In
SCART mode, this pin outputs the red signal.
Chrominance Output
A 75 Ω termination resistor with short traces should be attached
between C and ground for optimum performance. In normal operating
modes other than SCART, this pin outputs the chroma video signal. In
SCART mode, this pin outputs the green signal.
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 functions as the serial data pin of the I²C interface port (see the
I²C 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 I²C 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 I²C 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 the
CH7004, and MUST be connected to the system ground, to prevent
latchup. Refer to the Application Information section for information on
proper supply de-coupling.
Analog Supply Voltage
These pins supply the 5V power to the analog section of the CH7004.
General Purpose I/O Pin
201-0000-024 Rev 2.1, 8/2/99
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