參數(shù)資料
型號： MC44011FN
廠商： MOTOROLA INC
元件分類： 消費家電
英文描述： BUS CONTROLLED MULTISTANDARD VIDEO PROCESSOR
中文描述： SPECIALTY CONSUMER CIRCUIT, PQCC44
封裝： PLASTIC, LCC-44
文件頁數(shù)： 41/52頁
文件大小： 835K
代理商： MC44011FN
MC44011
41
MOTOROLA ANALOG IC DEVICE DATA
Table 20. Color Standard Selection Table
Flags
Bit Settings
#14
<576 Lines
#23
ACC Active
#24
PAL Signal
Crystal
SSA
($7C–6)
SSB
($7D–6)
SSC
($7C–7)
System
X
0
X
Either
1
1
0
Color Kill
0
1
0
Either
1
1
0
Color Kill
0
1
1
17.7 MHz
0
1
0
PAL
1
1
0
14.3 MHz
1
0
0
NTSC
1
1
1
(Note 1)
0
1
0
PAL–M
NOTES:
1.PAL–M, used in Brazil and other South American countries, can be decoded by the MC44011, but requires a 14.3024 MHz crystal.
2.SSD ($7A–6) is always set to 0.
MISCELLANEOUS APPLICATIONS INFORMATION
Use of the MC44140 Delay Line
The MC44140 delay line is generally required if PAL
signals are to be decoded, so as to average out the
line–by–line color information associated with PAL color
decoding. If the same single PAL video source is always used
in a particular application, the delay line can be eliminated,
and any slight phase errors can be corrected with the DAC of
register $79–5/0. If, however, various video sources can be
used, and/or if the video signal is less than broadcast quality,
it is recommended the MC44140 delay line be included.
The MC44140 acts on the color difference signals before
they enter the color difference stage of the MC44011. It will,
however, pass NTSC signals through without modifications.
The MC44011 uses the System Select output (Pin 34) to
indicate to the delay line which signals are being processed.
The System Select voltage is set when the color decoder is
set with Bits SSA, SSB, SSC, SSD. The Sandcastle output
(Pin 35) provides the horizontal timing signals to the delay
line. In addition, the MC44140 uses the crystal frequency for
the internal counters.
The MC44140 is inserted into the circuit between the Color
Difference outputs and inputs of the MC44011. In addition,
the MC44140 provides pins (Pins 8,9) for inserting an
alternate source of color difference signals to the MC44011
by setting the System Select to external (Bit $7C–7 = 1). See
Figure 44 for a suggested circuit.
If only NTSC signals are to be processed by the MC44011,
the MC44140 is not needed. In this case, connect Pin 42 to
Pin 31 with a 0.1
μ
F capacitor, and similarly connect Pin 41 to
Pin 30.
MC44140
R–Y
B–Y
0.01
0.01
0.1
1.0
0.02
47
5.0
0.01
68 k
5.0
0.1
0.02
MC44011
17.7 MHz
22 pF
22 pF
120 pF
10
1.0
0.1
0.1
B–Y In
R–Y In
B–Y Out
R–Y Out
Sys Sel
SandC
Xtal 2
Xtal 1
Gnd
Ext B–Y
B–Y Out
B–Y In
Gnd
VDD
B–Y In
R–Y In
Bias
Ext R–Y
R–Y Out
R–Y In
Sys Sel
SandC
Gnd
VDDA
Clk
8
7
6
5
4
3
2
1
14.3 MHz
Figure 44. Incorporating the MC44140 Delay Line
39
38
36
35
30
31
41
42
34
Alternate
Inputs
22
16
15
14
13
12
11
10
9
22
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