adv7171a-dbrd Analog Devices, Inc., adv7171a-dbrd Datasheet - Page 31

• Manufacturer Part Number: adv7171a-dbrd
• Description: Digital Pal/ntsc Video Encoder With 10-bit Ssaf ?nd Advanced Power Management
• Manufacturer: Analog Devices, Inc.

Genlock Control (MR22 to MR21)
These bits control the genlock feature of the ADV7170/
ADV7171. Setting MR21 to a Logic Level 1 configures the
SCRESET/RTC pin as an input. Setting MR22 to Logic Level 0
configures the SCRESET/RTC pin as a subcarrier reset input.
Therefore, the subcarrier resets to Field 0 following a low-to-
high transition on the SCRESET/RTC pin. Setting MR22 to
Logic Level 1 configures the SCRESET/RTC pin as a real-time
control input.
MR37
INPUT DEFAULT
0
1
MR17
COLOR
COLOR BAR
0
1
DISABLE
ENABLE
CONTROL
RESERVED
MR37
MR27
MR27
DISABLE
ENABLE
MR36
MR17
0
1
MODE CONTROL
MR26
LOW POWER MODE
MR16
TTXRQ BIT
0
1
0
1
NORMAL
BIT REQUEST
MR36
CONTROL
NORMAL
POWER-DOWN
MR26
DISABLE
ENABLE
DAC A
MR16
MR25
MR35
0
1
0
1
MR15
TELETEXT
ENABLE
0
1
MR35
CONTROL
ENABLE BURST
DISABLE BURST
DISABLE
ENABLE
BURST
CONTROL
MR25
NORMAL
POWER-DOWN
DAC B
MR15
CHROMA OUTPUT
MR34
MR24
0
1
0
1
MR14
SELECT
CHROMINANCE
MR34
0
1
CONTROL
ENABLE COLOR
DISABLE COLOR
DISABLE
ENABLE
Figure 39. Mode Register 1
Figure 40. Mode Register 2
Figure 41. Mode Register 3
MR33
CONTROL
MR24
NORMAL
POWER-DOWN
0
1
MR14
DAC D
Rev. B | Page 31 of 64
MR23
COMPOSITE
GREEN/LUMA/Y
MR13
0
1
MR33
0
1
ACTIVE VIDEO LINE
DAC A
MR23
CONTROL
MR13
720 PIXELS
710 PIXELS/702 PIXELS
MR32
NORMAL
POWER-DOWN
DAC C
DURATION
0
1
VBI_OPEN
Active Video Line Duration (MR23)
This bit switches between two active video line durations.
A 0 selects CCIR REC601 (720 pixels PAL/NTSC), and
a 1 selects ITU-R.BT470 standard for active video duration
(710 pixels NTSC; 702 pixels PAL).
Chrominance Control (MR24)
This bit enables the color information to be switched on and off
the video output.
MR22 MR21
MR32
x
0
1
DISABLE
ENABLE
MR12 MR11
BLUE/COMP/U
BLUE/COMP/U
0
0
1
1
GENLOCK CONTROL
MR22
MR12
CLOSED CAPTIONING
0
1
1
DAC B
FIELD SELECTION
DAC OUTPUT
0
1
0
1
DISABLE GENLOCK
ENABLE SUBCARRIER
RESET PIN
ENABLE RTC PIN
MR31
NO DATA OUT
ODD FIELD ONLY
EVEN FIELD ONLY
DATA OUT
(BOTH FIELDS)
MR21
MR11
RED/CHROMA/V
RED/CHROMA/V
RESERVED
MR10
MR30
MR30
MR31
0
1
DAC C
MR20
SQUARE PIXEL
0
1
INTERLACE
INTERLACED
NONINTERLACED
MR10
MR20
CONTROL
CONTROL
DISABLE
ENABLE
GREEN/LUMA/Y
COMPOSITE
DAC D
ADV7170/ADV7171