saa5281 NXP Semiconductors, saa5281 Datasheet - Page 3

• Manufacturer Part Number: saa5281
• Description: Integrated Video Input Processor And Teletext Decoder Ivt1.8
• Manufacturer: NXP Semiconductors

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Philips Semiconductors
BLOCK DIAGRAM
1996 Nov 04
Integrated Video input processor and
Teletext decoder (IVT1.8*)
ODD/EVEN
(or DV)
REF
IREF
21
6
9
V DD1
V SS1
5
GENERATOR
1
REFERENCE
POWER-ON
AND DECODING
REGENERATOR
DATA SLICER
ANALOG
CONVERTER
AQUISITION
AND CLOCK
RESET
-PARALLEL
SERIAL-TO
DECODER
TELETEXT
HAMMING
24 TO 18
V DD2
V SS2
10
14
Fig.1 Block diagram; pin numbers for DIP48 (SOT240-1).
V SS3
CONVERTER
25
Y
ANALOG
DIGITAL
22
BLAN
TO
19
COR
DISPLAY
RGBREF
20
CVBS
VPS CONTROL
PROCESSING
ACQUISITION
18
8
PACKET 26
DECODING
TELETEXT
ENGINE
SEPARATOR
R
AND SYNC
VPS
AND
15
OR
CLAMP
INPUT
G
BLACK
3
16
B
7
17
SAA5281
REFRESH
STTV/LFB
ANALOG
OUTPUT
BUFFER
TIMING
DRAM
AND
12
CLK EN
DISPLAY CLOCK
PHASE-LOCKED
36
INTERFACE
INTERFACE
OSCOUT
MEMORY
I C-BUS
GENERATOR
TIMING
2
CHAIN
LOOP
27 MHz
CLOCK
8K x 8
DRAM
2
OSCIN
Preliminary specification
3
24
23
44
13
11
37
4
SAA5281
MBD783
SDA
LINE 23
VCR/FFB
POL
CLK O/P
OSCGND
SCL