ADV7177 Analog Devices, ADV7177 Datasheet - Page 10

• Manufacturer Part Number: ADV7177
• Description: Integrated Digital CCIR-601 to PAL/NTSC Video Encoder
• Manufacturer: Analog Devices

ADV7177/ADV7178
Pin
No.
1, 20, 28, 30
2
3–10, 12–14,
37–41
11
15
16
17
18
19, 21, 29, 42
22
23
24
25
26
27
31
32
33
34–36
43
44
Mnemonic
V
CLOCK/2
P15–P0
OSD_EN
HSYNC
FIELD/VSYNC
BLANK
ALSB
GND
RESET
SCLOCK
SDATA
COMP
DAC C
DAC B
DAC A
V
R
OSD_0–2
CLOCK
CLOCK
AA
REF
SET
Input/
Output
P
O
I
I
I/O
I/O
I/O
I
G
I
I
I/O
O
O
O
O
I/O
I
I
O
I
PIN FUNCTION DESCRIPTIONS
Function
+5 V Supply.
Synchronous Clock output signal. Can be either 27 MHz or 13.5 MHz; this
can be controlled by MR32 and MR33 in Mode Register 3.
8-Bit 4:2:2 Multiplexed YCrCb Pixel Port (P7–P0) or 16-Bit YCrCb
Pixel Port (P15–P0). P0 represents the LSB.
Enables OSD input data on the video outputs.
HSYNC (Modes 1 and 2) Control Signal. This pin may be configured to
output (Master Mode) or accept (Slave Mode) Sync signals.
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.
Video Blanking Control Signal. The pixel inputs are ignored when this is
Logic Level “0.” This signal is optional.
TTL Address Input. This signal sets up the LSB of the MPU address.
Ground Pin.
The input resets the on-chip timing generator and sets the ADV7177/ADV7178
into default mode. This is NTSC operation, Timing Slave Mode 0, 8-Bit
Operation, 2
MPU Port Serial Interface Clock Input.
MPU Port Serial Data Input/Output.
Compensation Pin. Connect a 0.1 F Capacitor from COMP to V
DAC C Analog Output.
DAC B Analog Output.
DAC A Analog Output.
Voltage Reference Input for DACs or Voltage Reference Output (1.2 V).
A 300
amplitudes of the Video Signals.
On Screen Display Inputs.
Crystal Oscillator output (to crystal). Leave unconnected if no crystal is used.
Crystal Oscillator input. If no crystal is used this pin can be driven by an
external TTL Clock source; it requires a stable 27 MHz reference Clock for
standard operation. Alternatively, a 24.52 MHz (NTSC) or 29.5 MHz (PAL)
can be used for square pixel operation.
–10–
resistor connected from this pin to GND is used to control full-scale
Composite and S VHS out.
AA
.
REV. 0