SAA1101 데이터 시트보기 (PDF) - Philips Electronics
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SAA1101 Datasheet PDF : 18 Pages
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Philips Semiconductors
Universal sync generator (USG)
Product specification
SAA1101
WAVEFORM TIMING
The waveform timing depends on the frequency of the oscillator input (fOSCI). This is illustrated in the table below as the
number (N) of oscillations at OSCI. The timings are derived from N × tOSCI ± 100 ns.
One horizontal scan (H) = 320 × tOSCI =1/fH.
Where tOSCI = 200 ns for PAL/SECAM and 198.6 ns for NTSC/PAL-M
SYMBOL
PARAMETER
PAL
NTSC
PAL-M
SECAM
UNIT N
Composite sync (CS)
tWSC1
horizontal sync pulse 4.8
width
tWSC2
tWSC3
−
equalizing pulse width 2.4
serration pulse width 4.8
duration of
2.5
pre-equalizing pulses
−
duration of
2.5
post-equalizing
pulses
−
duration of serration 2.5
pulses
4.77
4.77
4.8
2.38
2.38
2.4
4.77
4.77
4.8
3
3
2.5
3
3
2.5
3
3.5
2.5
µs
24
µs
12
µs
24
H
−
H
−
H
−
Composite blanking (CB)
HORIZONTAL BLANKING PULSE WIDTH
tWCB
tWCB
tWCB
PAL/SECAM/PAL-M 12
NTSC1
−
NTSC2
−
−
11.12
12
11.12
−
−
10.53 (note1) −
−
µs
60
µs
56
µs
53
FRONT PORCH
tPCBCS
front porch
1.6
1.59
1.59
1.6
µs
8
DURATION OF VERTICAL BLANKING
−
PAL/SECAM/PAL-M 25H + tWCB
−
21H + tWCB
25H + tWCB
−
−
−
NTSC1
−
21H + tWCB
−
−
−
−
−
NTSC2
−
19H + tWCB
−
−
−
−
Burst key (BK) (not SECAM)
tWBK
tPCSBK
−
burst key pulse width 2.4
CS to burst key delay 5.6
burst suppression
9
2.38
2.38
−
5.56
5.76
−
9
11
−
µs
12
µs
28
H
−
POSITION OF BURST SUPPRESSION
−
first half picture
H623 to H6 H523 to H6 H523 to H8 −
−
second half picture H310 to H318 H261 to H269 H260 to H270 −
−
third half picture
H622 to H5 H523 to H6 H522 to H7 −
−
fourth half picture
H311 to H319 H261 to H269 H259 to H269 −
−
−
−
−
−
−
−
−
January 1990
12
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