4581CS 查看數據表（PDF） - Intersil
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4581CS Datasheet PDF : 10 Pages
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EL4581
Timing Diagrams
SIGNAL 1a. COMPOSITE VIDEO INPUT, FIELD ONE
1.5µs±230µs
FIELD ONE
TIME
VERTICAL
BLANKING
T1
INTERVAL =
+H
20H -0
(1271µs+-06µ3s.5µs)
3H
3H
3H
1
2
3
4
5
6
7
8
9
10
19
20
H SYNC
INTERVAL
START OF
FIELD ONE
H
H
PRE-EQUALIZING
PULSE INTERVAL
SIGNAL 1b. COMPOSITE SYNC OUTPUT, PIN 1
H
VERTICAL SYNC
PULSE INTERVAL
9 LINE VERTICAL
INTERVAL
0.5H
H
POST-EQUALIZING
PULSE INTERVAL
REF SUBCARRIER PHASE,
COLOR FIELD ONE
21
(*SEE NOTE)
SIGNAL 1c. VERTICAL SYNC OUTPUT, PIN 3
SIGNAL 1d. ODD-EVEN OUTPUT, PIN 7
SIGNAL 1e. BACK PORCH OUTPUT, PIN 5
SEE FIG 2, 3
SEE FIG 4
NOTES:
9. The composite sync output reproduces all the video input sync pulses, with a propagation delay.
10. Vertical sync leading edge is coincident with the first vertical serration pulse leading edge, with a propagation delay.
11. Odd-even output is low for even field, and high for odd field.
12. Back porch goes low for a fixed pulse width on the trailing edge of video input sync pulses. Note that for serration pulses during vertical, the
back porch starts on the rising edge of the serration pulse (with propagation delay).
FIGURE 10.
5
FN7172.2
November 12, 2010
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