ML6430/ML6431
FIELD 1
Vertical Blanking Interval
3H
525
1
2
3
4
3H
5
6
7
3H
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
H
Start of
Field 1
H
H
H/2
H
FIELD 2
Vertical Blanking Interval
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
H/2
Start of
Field 2
9 or 16 Lines
VBLANK
Pin 24
FRESET
Pin 22
�½ Line
(Odd Vertical Intervals Only)
FIELDID
Pin 17
Low For Odd Fields
FIELDID
Pin 17
High For Even Fields
Figure 2. NTSC Field Rate Waveforms
FIELD BLANKING (25 LINES + LINE BLANKING)
END OF FOURTH FIELD (ODD)
WHITE LEVEL
BEGINNING OF FIRST FIELD (EVEN)
BLACK LEVEL
BLANKING LEVEL
SYNC LEVEL
}
622
623
624
625
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
23
2.5 LINES
5
EQUALIZING
PULSES
END OF FIRST FIELD (EVEN)
WHITE LEVEL
2.5 LINES
FIELD SYNC
5 BROAD
PULSES
2.5 LINES
5
EQUALIZING
PULSES
BEGINNING OF SECOND FIELD (ODD)
BLACK LEVEL
BLANKING LEVEL
SYNC LEVEL
}
~
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
336
VBLANK
Pin 24
FRESET
Pin 22
ODDFLD
Pin 17
BROAD PULSE
SEPARATION
4.7µs ± 100ns
7.5 or 16 Lines
�½ Line
(Second Field Vertical Interval Only)
High for Second Field, Low for First Field
Figure 3. PAL 625 Field Rate Waveforms
~
11
MICRO-LINEAR [ MICRO LINEAR CORPORATION ]
