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ADV7175 Datasheet(PDF) 5 Page - Analog Devices

Part No. ADV7175
Description  Integrated Digital CCIR-601 YCrCb to PAL/NTSC Video Encoder
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ADV7175 Datasheet(HTML) 5 Page - Analog Devices

 
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ADV7175/ADV7176
REV. A
–5–
PIN DESCRIPTION
Mnemonic
Input/Output
Function
P15-P0
I
8-Bit 4:2:2 Multiplexed YCrCb Pixel Port (P7–P0) or
16-Bit YCrCb Pixel Port (P15–P0). P0 represents the LSB.
CLOCK
I
TTL Clock Input. Requires a stable 27 MHz reference Clock for proper operation.
Alternatively a 24.52 MHz (NTSC) or 29.5 MHz (PAL) can be used for square pixel
operation.
HSYNC
I/O
HSYNC
(Modes 1 & 2) Control Signal. This pin may be configured to output (Mas-
ter Mode) or accept (Slave Mode) Sync signals.
FIELD/VSYNC
I/O
Dual Function FIELD (Mode 1) and VSYNC (Mode 2) Control Signal. This pin may
be configured to output (Master Mode) or accept (Slave Mode) these control signals.
BLANK
I/O
Video Blanking Control Signal. The pixel inputs are ignored when this is logic level
“0.” This signal is optional.
SCRESET/RTC
I
This pin can be configured as an input by setting MR22 and MR21 of Mode
Register 2. It can be configured as a subcarrier reset pin, in which case a high to low
transition on this pin will reset the subcarrier to field 0. Alternatively it may be con-
figured as a Real Time Control (RTC) input.
VREF
I/O
Voltage Reference Input for DACs or Voltage Reference Output (1.2 V).
RSET
I
A 150
Ω resistor connected from this pin to GND is used to control full-scale ampli-
tudes of the video signals.
COMP
O
Compensation Pin. Connect a 0.1
µF capacitor from COMP to V
AA.
COMPOSITE
O
PAL/NTSC Composite Video Output. Full-Scale Output is 180IRE (1286 mV) for
NTSC and 1300 mV for PAL.
RED/CHROMA/V
O
RED/S-VHS C/V Analog Output.
GREEN/LUMA/Y
O
GREEN/S-VHS Y/Y Analog Output.
BLUE/COMPOSITE/U
O
BLUE/Composite/U Analog Output.
SCLOCK
I
MPU Port Serial Interface Clock Input.
SDATA
I/O
MPU Port Serial Data Input/Output.
ALSB
I
TTL Address Input. This signal set up the LSB of the MPU address.
RESET
I
The input resets the on chip timing generator and sets the ADV7175/ADV7176 into
default mode. This is NTSC operation, Timing Slave Mode 0, 8-bit operation, 2
×
composite & S VHS out.
VAA
P
+5 V Supply.
GND
G
Ground Pin.
PIN CONFIGURATION
12 13 14 15 16 17
18 19 20 21 22
3
4
5
6
7
1
2
10
11
8
9
40
39 38
41
42
43
44
36 35 34
37
29
30
31
32
27
28
25
26
23
24
33
PIN 1
IDENTIFIER
TOP VIEW
(Not to Scale)
VREF
COMPOSITE
BLUE/COMPOSITE/U
VAA
GND
VAA
GREEN/LUMA/Y
VAA
P5
P6
P7
P8
P9
P10
P11
P12
GND
VAA
RED/CHROMA/V
COMP
SDATA
SCLOCK
ADV7175/ADV7176
PQFP


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