Pioneer DV-444 Service Manual page 83

ADV7172KST (DVDM ASSY : IC861)
• Digital PAL/NTSC Video Encoder with Six DACs (10-bits), Color Control and Enhanced Power Management
•
Pin Arrangement
48 47 46 45 44 43 42 41 40 39 38 37
V
1
AA
P0
2
P1
3
P2
4
P3
5
P4
6
P5
7
P6
8
P7
9
CSO_HSO
10
V
11
AA
GND
12
13 14 15 16 17 18 19 20 21 22 23 24
•
Block Diagram
48 43
HSYNC 14
FIELD/
VIDEO TIMING
15
VSYNC
GENERATOR
BLANK 16
RESET 44
41
TTX
TELETEXT
INSERTION BLOCK
TTXREQ 40
8
VCrCb
4:2:2 TO
P0-P7
2 TO
4:4:4 8
(COLOR | YUV
INTER-
9 MATRIX
DATA) POLATOR
8
•
Pin Function
N . o N a m e / I O
1 V P
A A
2 P 0
3 P 1
I
4 P 2
5 P 3
COMP1
36
DAC A
35
V
34
AA
DAC B
33
V
32
AA
GND
31
V
30
AA
DAC C
29
DACD
28
V
27
AA
GND
26
DAC E
25
10 45 14 20
2
I C MPU PORT
BRIGHTNESS AND
CONTRAST CONTROL
ADD SYNC
Y 8
INTERPOLATOR
U
SATURATION CONTROL
8
ADD BURST
V 8
INTERPOLATOR
REAL-TIME
CONTROL CIRCUIT
SCRESET/RTC
P o w r e S u p p y l + ( 3 V o t + 5 ) V
8 b - t i 4 : 2 : 2 M u t l p i e l x e d Y C r C b
21 17
CONTROL
LUMA
PROGRAMMABLE
10
FILTER
SHARPNESS
FILTER
10
MODULATOR
PROGRAMMABLE
CHROMA
10
FILTER
CONTROL
10
SIN/COS
DDS SLOCK
39 12,13,18,26,31,47
GND
P n i F u n t c o i n
P x i l e P o t r P ( 7 P - ) 0 P 0 e r p e r s e
DV-444, DV-440
10 10
10BIT
YUV TO
DAC
RGB
MATRIX
10 10 10BIT
DAC
YUV
LEVEL
10
10 10BIT
BLOCK DAC
DAC
CONTROL
BLOCK
10
10BIT
DAC
10
10 10BIT
10
DAC
HUE
10
10 10BIT
DAC
10
DAC
CONTROL
BLOCK
n s t h t e L S B
35 DAC A
DAC B
33
29 DAC C
V
37
REF
22 R
ESET2
COMP2
23
25 DAC E
DAC F
24
DAC D
28
R
38
ESET1
COMP1
36
83