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PDF CH7203 Datasheet ( Hoja de datos )

Número de pieza CH7203
Descripción MPEG to TV Encoder with 16-bit Input
Fabricantes ETC 
Logotipo ETC Logotipo

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CH7203 Hoja de datos, Descripción, Manual
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CHRONTEL
CH7203
MPEG to TV Encoder with 16-bit Input
Features
• Outputs to NTSC, PAL (B, D, G, H, I) and PAL-60
• 16-bit YCrCb (4:2:2) input format
• Simultaneous composite/S-video outputs
• Triple 9-bit video DACs
• 27 MHz DAC operating frequency eliminates
the need for 1/sinc(x) correction filter
• Low-jitter phase-locked loop circuitry operates
using a low-cost 14.31818 MHz crystal
• 40.5 or 33.9 MHz video decoder clock output
• 16.934 or 11.289 MHz audio decoder clock output
• 13.5 MHz and 27 MHz video pixel clock outputs
• Optimized luminance and chrominance internal
filters for NTSC and PAL
• HSYNC* and VSYNC* outputs for
master mode operation
• Sleep mode
• CMOS technology in 44-pin PLCC
• 5V single-supply operation
Description
The CH7203 video encoder integrates a dual PLL clock
generator and a digital NTSC/PAL video encoder. By
generating all essential clock signals for MPEG
playback, and converting digital video inputs to either
NTSC or PAL video signals, the CH7203 is an essential
component of any low-cost solution for video-CD
playback machines.
The CH7203 dual PLL clock synthesizer generates all
clocks and timing signals from a 14.31818 MHz
reference crystal (see application note 19 “Tuning
Clock Outputs” for selection and tuning of the 14.31818
MHz crystal). The CH7203 generates a 40.5 or 33.9
MHz video decoder clock, 13.5 MHz and 27 MHz
video pixel clocks, and a 16.934 or 11.289 MHz audio
decoder clock. Timing signals from the PLLs are used
to generate the horizontal and vertical sync signals
which enable operating the CH7203 in master mode.
The fully digital video encoder is pin-programmable to
generate either a 525-line NTSC or a 625-line PAL
compatible video signal. It also features a logic
selectable sleep mode which turns the encoder off while
leaving both PLL’s running.
MOD 0
MOD 1
FS
C RSEN*
CR S
VDD
AVDD
R SET
Y[7 :0],
C[7:0 ]
16
I NTE RFACE
H SYNC*
VSYNC*
S TAT E
M ACHI NE
BL AN KING
H ,V SYNC
GEN ERATO R
L INE AR
INTE RP OLATO R
Y
FILTER
M
U
X
U
FILTER
M
U
X
X
IR EF
9 DAC
Σ 9 DAC
Σ 9 DAC
PC LK
2XPC LK
DC LK
1/ 2
PLL1
V
FILTER
M
U
X
X
A CLK
PLL2
www.DataSheet4U.com
201-0000-031 Rev 2.0, 6/2/99
OSC
B LA NKIN G
COL O R-B URST
CO NT RO L
S IN + COSINE
GEN ER ATOR
XI XO/FIN
GN D
A GN D
Figure 1: Functional Block Diagram
Y
CVB S
C
1

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CH7203 pdf
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CHRONTEL
CH7203
MPEG Decoder
and
System Controller
8 19-26
Y[7:0]
8 11 - 18
C[7:0]
1 ACLK
41 DCLK
43 2XPCLK
39 PCLK
37 VSYNC*
35 HSYNC*
7
CRS EN
10
CRS
9
MOD1
38
MOD0
27 pF2
14.318
MHz
27 pF2
3
X O/FIN
4
XI
CH7203
Ferrite Bead1
32
Y
75
Ferrite Bead1
C 30
75
Ferrite Bead1
31
CVBS
75
28
RSE T
360
FS 8 JUMPER
Note:
Figure 3: CH7203 Interface Diagram
1. Please refer to the Optional Output Filter diagram below
2. The proper value of these capacitors depends on the crystal manufacturer’s specifications. Please refer to AN06 for the
details of the calculation.
Y, C, CVBS
75
47 pF
1.2uH
150 pF
1.2uH
270pF
O UTP UT
Figure 4: Optional Output Filter
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201-0000-031 Rev 2.0, 6/2/99
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CH7203 arduino
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CHRONTEL
CH7203
Color / Level
Cyan / Red
Green / Magenta
Yellow / Blue
mA
2225..6307
2214..8559
1292..6116
V
0.895418
0.892129
00..783315
COLOR BARS :
Peak Burst
185..1958 0.568919
Blank
1142..24994 00..456368
Peak Burst
Yellow / Blue
108.4.949 0.33917
56..3473 00..220411
3.579545 MHz Color Burst
(9 cycles)
Green / Magenta
Cyan / Red
34..1020 00..115107
32..2317 00..012819
Note: 1 100% amplitude, 100% saturation color bars are shown
Note: 2 Vref = 1.235V, RSET = 360, 75doubly terminated load
Figure 12: NTSC C (Chrominance) Video Output Waveform
Color / Level
Cyan / Red
Green / Magenta
Yellow / Blue
mA
2272..0660
2261..2825
1239..6631
V
10..081458
00..988139
00..878365
COLOR BARS :
Peak Burst
1196..2213 00..762009
Blank
Peak Burst
Yellow / Blue
1152..2449
118..2784
00..547628
00..432238
65..3857 00..225071
4.433619 MHz Color Burst
(10 cycles)
Green / Magenta
Cyan / Red
43.1272 00..116107
23..3473 00..102899
Note: 1 100% amplitude, 100% saturation color bars are shown
Note: 2 Vref = 1.235V, RSET = 360, 75doubly terminated load
Figure 13: PAL C (Chrominance) Video Output Waveform
www.DataSheet4U.com
201-0000-031 Rev 2.0, 6/2/99
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