MAX9526 Maxim Integrated Products, MAX9526 Datasheet - Page 23

• Manufacturer Part Number: MAX9526
• Description: High-Performance NTSC/PAL Video Decoder
• Manufacturer: Maxim Integrated Products

w w w . D a t a S h e e t 4 U . c o m
1 = Active video detected at V
0 = No active video detected on V
1 = Active video detected at V
0 = No active video detected on V
1 = Color carrier has fallen below color kill threshold
0 = Color carrier has not fallen below color kill thresh-
CTHR reports when the chroma carrier is below color
kill threshold. See register 0x0B for color kill threshold
and color kill enable settings.
1 = ADC has gone outside the full-scale range since
0 = ADC has not gone outside the full-scale range
ADCOVR triggers when the ADC input is above or
below the ADC input range. This bit is cleared after
reading status register 0. ADCOVR is not triggered on
lines during the vertical blanking interval, on lines at the
start or end of the field that may have pulses from copy
protection, or on lines that may have ancillary data.
1 = 525 line video detected.
0 = 625 line video detected.
This output is only valid when the decoder is locked
and operating normally.
Status Register 0
Status Register 1
REG
0x00
REG
0x01
since last register 0 read.
old since last register 0 read.
last register 0 read.
since last register 0 read.
VID1
______________________________________________________________________________________
B7
B7
Below Color Kill Threshold (CTHR)
0
ADC Out-of-Range (ADCOVR)
Video Input 1 Active (V
Video Input 2 Active (V
VID2
L525
IN1
IN2
B6
B6
525 Line Mode (L525)
.
.
IN1
IN2
.
.
Low-Power, High-Performance
B5
B5
0
0
ID1
ID2
)
)
NTSC/PAL Video Decoder
CTHR
B4
B4
0
1 = Line-locked PLL is locked to horizontal line rate and
0 = Line-locked PLL has lost lock since last status reg-
1 = Nonstandard video detected.
0 = Standard video format detected.
For standard video, the carrier frequency is always a
precise multiple of the horizontal frequency. An exam-
ple of nonstandard inputs are video cassette recorders
in which the carrier is not a precise multiple of the hori-
zontal frequency.
1 = Demodulator has lost lock since last status register
0 = Demodulator has maintained lock since last status
1 = Analog copy protection detected.
0 = No analog copy protection detected.
has not lost lock since last status register 0 read.
ister 0 read.
0 read.
register 0 read.
ADCOVR
B3
B3
0
Demodulator Lost Lock (LSTLCK)
HLOCK
B2
B2
0
Analog Copy Protection (ACP)
I
Nonstandard Video (NONSTD)
2
C Bit Descriptions
Horizontal Lock (HLOCK)
NONSTD
B1
B1
0
LSTLCK
ACP
B0
B0
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