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ManualsBrandsLinear Technology ManualsDAC - Digital to AnalogVideo Encoder 10bit LFCSP-
71727374757677787980
Data Sheet ADV7390/ADV7391/ADV7392/ADV7393
Rev. J | Page 75 of 107
CRC SEQUENCE
REF
0 IRE
–40 IRE
+70 IRE
+100 IRE
11.2µs
2.235µs ± 20ns
49.1µs ± 0.5µs
C0 C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12
C13 C14 C15 C16 C17
C18 C19
06234-093
Figure 95. Standard Definition CGMS Waveform
C0 C1 C2 C3 C4 C5 C6 C7
C8 C9 C10 C11 C12
CRC SEQUENCE
REF
5.8µs ± 0.15µs
6T
0mV
–300mV
70% ± 10%
T = 1/(
f
H
× 33) = 963ns
f
H
= HORIZONTAL SCAN FREQUENCY
T ± 30ns
+700mV
21.2µs ± 0.22µs
22T
C13 C14 C15 C16 C17
C18 C19
BIT 1 BIT 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . BIT 20
06234-094
Figure 96. Enhanced Definition (525p) CGMS Waveform
R S
C0
LSB
C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12
C13
MSB
PEAK WHITE
SYNC LEVEL
500mV ± 25mV
5.5µs ± 0.125µs
R = RUN-IN
S = START CODE
13.7µs
06234-095
Figure 97. Enhanced Definition (625p) CGMS Waveform
CRC SEQUENCE
REF
4T
3.128µs ± 90ns
17.2µs ± 160ns
22T
T = 1/(
f
H
× 1650/58) = 781.93ns
f
H
= HORIZON
TAL SCAN FREQUENCY
1H
T ± 30ns
0mV
–300mV
70% ± 10%
+700mV
C0 C1 C2 C3 C4 C5 C6 C7 C8 C9 C10
C11 C12
C13 C14 C15 C16 C17
C18 C19
BIT 1 BIT 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . BIT 20
06234-096
Figure 98. High Definition (720p) CGMS Waveform
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