ch7005c Chrontel, ch7005c Datasheet - Page 4

• Manufacturer Part Number: ch7005c
• Description: Digital Pc To Tv Encoder With Macrovisiontm
• Manufacturer: Chrontel

CHRONTEL
4
Table 1. Pin Descriptions
44-Pin
LQFP
19,23
30,38
28,36
5,16,
8,18,
21
20
17
26
27
29
34
31
25
Power
Power
Power
Power
Power
Power
In/Out
Type
Out
Out
Out
In
In
Symbol
CVBS/B
CSYNC
Reset*
AGND
DGND
DVDD
AVDD
GND
VDD
C/G
SD
SC
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
and RGB bypass, this pin outputs the composite video signal. In SCART and RGB
Bypass modes, 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
and RGB bypass, this pin outputs the composite video signal. In SCART and RGB
Bypass modes, 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 serial port, and uses the DVDD supply
and is not 5V tolerant.
Serial Clock (Internal pull-up)
This pin functions as the serial clock pin of the serial port, and uses the DVDD
supply and is not 5V tolerant..
Reset Input
When this pin is low, the CH7005 is held in the power-on reset condition. When this
pin is high, the device operates normally and reset is controlled through the serial
port register.
Analog ground
This pin provides the ground reference for the analog section of the CH7005, and
MUST be connected to the system ground, to prevent latchup. Refer to the
Application Information section for information on proper supply decoupling.
Analog Supply Voltage
This pins supplies the 5V power to the analog section of the CH7005.
DAC Power Supply
This pins supplies the 5V power to CH7005’s internal DAC’s.
DAC Ground
These pins provide the ground reference for CH7005’s internal DACs. For
information on proper supply decoupling, please refer to the Application Information
section.
Digital Supply Voltage
These pins supply the 3.3V power to the digital section of CH7005.
Digital Ground
These pins provide the ground reference for the digital section of CH7005, and
MUST be connected to the system ground to prevent latchup.
Description
201-0000-025 Rev. 2.9, 6/24/2004
CH7005C