參數(shù)資料
型號(hào)： MC44007P
廠商： MOTOROLA INC
元件分類： 消費(fèi)家電
英文描述： CHROMA 4 VIDEO PROCESSOR
中文描述： SPECIALTY CONSUMER CIRCUIT, PDIP40
封裝： PLASTIC, DIP-40
文件頁(yè)數(shù)： 23/40頁(yè)
文件大小： 491K
代理商： MC44007P
MC44002 MC44007
23
MOTOROLA ANALOG IC DEVICE DATA
Figure 16. Auto Gray Scale Control Loops
R Intensity
(MCU)
Latch 3
Latch 2
Latch 1
DAC3
DAC2
DAC1
Cathode
Current
Feedback
R
2.5 V
Comp2
Comp1
Buffer
Vref2
Vref1
G2 Down
Request
G2 Up
Request
To MPU
B DC
G DC
R DC
Down
Up
G2 Up/Down
Request
Clock Debounce
Up/Down
Counter
Offset
Compensation
Timing
Signals
Output
Output
Output
B DC
DAC
B GAIN
DAC
G DC
DAC
G GAIN
DAC
R DC
DAC
R GAIN
DAC
DAC4
Latch 10
Latch 9
Latch 8
Latch 7
Latch 6
Latch 5
Latch 4
Dark
Bright
Load
Backload
BLUE Line
GREEN Line
RED Line
Vertical
Vertical
Clock
S
x
L
R Signal
G Signal
B Signal
20
17
18
19
Bout
Gout
Rout
Latch
Excess Peak
Beam Current
(MCU)
EPBC Reset
(MCU)
G Intensity
(MCU)
B Intensity
(MCU)
PIN FUNCTION AND EXTERNAL CIRCUIT REQUIREMENTS
The following section describes the purpose and function
of each of the 40 pins on the MC44002/7. There is also an
explanation of the external circuit component requirements
for a practical application; a diagram of the small signal circuit
will be found in Figure 17. One of the primary design aims for
the MC44002/7 was to use the minimum number of external
components, and where these are necessary, to employ low
cost and easily obtainable standard types. Thus for example,
as all the video signal filtering is carried out on the IC, there
are no coils required whatsoever. The most common
requirement is for ac coupling capacitors which are far too big
to be integrated onto the chip. The time constants on certain
pins are deliberately determined by external components to
facilitate testing and for fine tuning the performance.
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PDF描述
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