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VPX3216B 데이터시트 PDF




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VPX3216B 데이터시트, 핀배열, 회로
MICRONAS
INTERMETALL
PRELIMINARY DATA SHEET
VPX 3220 A,
VPX 3216 B,
VPX 3214 C
Video Pixel Decoders
Edition July 1, 1996
6251-368-2PD
MICRONAS




VPX3216B pdf, 반도체, 판매, 대치품
VPX 3220 A, VPX 3216 B, VPX 3214 C
PRELIMINARY DATA SHEET
Contents, continued
Page
Section Title
49 6.
Specifications
49 6.1. Outline Dimensions
50 6.2. Pin Connections and Short Descriptions
53 6.3. Pin Descriptions
54 6.4. Pin Configuration
55 6.5. Pin Circuits
57 6.6. Electrical Characteristics
57
6.6.1.
Absolute Maximum Ratings
59
6.6.2.
Recommended Operating Conditions
59
6.6.3.
Power Consumption
60
6.6.4.
Characteristics, Reset
60
6.6.5.
Input Characteristics of RES and OE
60
6.6.6.
Recommended Crystal Characteristics
60
6.6.7.
XTAL Input Characteristics
61
6.6.8.
Characteristics, Analog Video Inputs
62
6.6.9.
Characteristics, Analog Front-End and ADCs
63
6.6.10.
Characteristics of the JTAG Interface
64 6.6.10.1. Timing of the Test Access Port TAP
65
6.6.11.
Characteristics, I2C-Bus Interface
66
6.6.12.
Digital Video Interface
68 6.6.12.1. Characteristics, Synchronous Mode, 13.5 MHz Data Rate, “Single Clock”
69 6.6.12.2. Characteristics, Synchronous Mode, 20.25 MHz Data Rate, “Single Clock”
70 6.6.12.3. Characteristics, Synchronous Mode, 13.5 MHz Data Rate, “Double Clock”
71 6.6.12.4. Characteristics, Asynchronous Mode
73
6.6.13.
Characteristics, TTL Output Driver
74 6.6.13.1. TTL Output Driver Type A
74 6.6.13.2. TTL Output Driver Type B
75
6.6.14.
Characteristics, Enable/Disable of Output Signals
77 1.
Introduction for Addendum
77 2.
New Output Timing – NewVACT
79 3.
Low Power Mode
80 4.
Data Sheet History
4 MICRONAS INTERMETALL

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VPX3216B 전자부품, 판매, 대치품
PRELIMINARY DATA SHEET
VPX 3220 A, VPX 3216 B, VPX 3214 C
2.1.4. Digitally Controlled Clock Oscillator
The clock generation is also a part of the analog front-
end. The crystal oscillator is controlled digitally by the
control processor; the clock frequency can be adjusted
within ±150 ppm if the recommended crystal is used.
2.1.5. Analog-to-Digital Converters
Two ADCs are provided to digitize the input signals.
Each converter runs with 20.25 MHz and has 8-bit reso-
lution. An integrated bandgap circuit generates the re-
quired reference voltages for the converters. The two
ADCs are of a 2-stage subranging type.
2.2.1. IF-Compensation
With off-air or mistuned reception, any attenuation at
higher frequencies or asymmetry around the color sub-
carrier is compensated. Three different settings of the
IF-compensation are possible:
– flat (no compensation)
– 6 dB/octave
– 12 dB/octave
2.2. Color Decoder
In this block, the entire luma/chroma separation and
multistandard color demodulation is carried out. The col-
or demodulation uses an asynchronous clock, thus al-
lowing a unified architecture for all color standards.
Both luma and chroma are processed to an orthogonal
sampling raster. Luma and chroma delays are matched.
The total delay of the decoder is adjustable by a FIFO
memory. Therefore, even when the display processing
delay is included, a processing delay of exactly 64 µsec
can be achieved.
The color decoder output is YCrCb in a 4:2:2 format.
Fig. 2–3: Frequency response of chroma IF-com-
pensation
2.2.2. Demodulator
The entire signal (which might still contain luma) is now
quadrature-mixed to the baseband. The mixing frequen-
cy is equal to the subcarrier for PAL and NTSC, thus
achieving the chroma demodulation. For SECAM, the
mixing frequency is 4.286 MHz giving the quadrature
baseband components of the FM modulated chroma.
After the mixer, a lowpass filter selects the chroma com-
ponents; a downsampling stage converts the color dif-
ference signals to a multiplexed half-rate data stream.
The subcarrier frequency in the demodulator is gener-
ated by direct digital synthesis; therefore, substandards
such as PAL 3.58 or NTSC 4.43 can also be demodu-
lated.
MICRONAS INTERMETALL
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