Philips DVDR725H, Руководство по обслуживанию

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Circuit-, IC descriptions and list of abbreviations
EN 182 HDRW720/0x, DVDR725H/0x 9.
ADV7196A
PIN FUNCTION DESCRIPTIONS
Pin Mnemonic Input/Output Function
1, 12 V
DD
P Digital Power Supply
2–11 Y0–Y9 I 10-Bit Progressive Scan/HDTV Input Port for Y Data. Input for G data when
RGB data is input.
13, 52 GND G Digital Ground
14–23 Cr0–Cr9 I
1
0-Bit Progressive Scan/HDTV Input Port for Color Data in 4:4:4 Input Mode.
In 4:2:2 mode this input port is not used. Input port for R data when RGB data
is input.
24, 35 V
AA
P Analog Power Supply
25 CLKIN I Pixel Clock Input. Requires a 27 MHz reference clock for standard operation in
Progressive Scan Mode or a 74.25 MHz (74.1758 MHz) reference clock in
HDTV mode.
26, 33 AGND G Analog Ground
27 DV I Video Blanking Control Signal Input
28
VSYNC/
I
VSYNC
, Vertical Sync Control Signal Input or TSYNC Input Control Signal in
TSYNC Async Timing Mode
29
HSYNC/
I
HSYNC
, Horizontal Sync Control Signal Input or
SYNC
Input Control Signal in
SYNC
Async Timing Mode
30 SCL I MPU Port Serial Interface Clock Input
31 SDA I/O MPU Port Serial Data Input/Output
32 DAC C O Color Component Analog Output of Input Data on Cb/Cr9–0 Input Pins
34 DAC A O Y Analog Output
36 DAC B O Color Component Analog Output of Input Data on Cr9–Cr0 Input Pins
37 COMP O Compensation Pin for DACs. Connect 0.1
µ
F capacitor from COMP pin to V
AA
.
38 R
SET
I A 2470
Ω
resistor (for input ranges 64–940 and 64–960; output standards
EIA-770.1–EIA-770.3) must be connected from this pin to ground and is used to
control the amplitudes of the DAC outputs. For input ranges 0–1023 (output
standards RS-170, RS-343A) the R
SET
value must be 2820
Ω
.
39 V
REF
I/O Optional External Voltage Reference Input for DACs or Voltage Reference
Output (1.235 V)
40
RESET
I This input resets the on-chip timing generator and sets the ADV7196A into
Default Register setting. Reset is an active low signal.
41 ALSB I TTL Address Input. This signal sets up the LSB of the MPU address. When this
pin is tied high, the I
2
C filter is activated which reduces noise on the I
2
C interface.
When this pin is tied low, the input bandwidth on the I
2
C interface is increased.
42–51 Cb/Cr9–0 I
1
0-Bit Progressive Scan/HDTV Input Port for Color Data. In 4:2:2 mode the
multiplexed CrCb data must be input on these pins. Input port for B data when
RGB is input.