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STMicroelectronics Electronic Components Datasheet

STV3208 Datasheet

8 x 8 DISCRETE COSINE TRANSFORM

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STV3208
8 x 8 DISCRETE COSINE TRANSFORM (DCT)
. 0 TO 27MHz PIXEL RATE IN SINGLE
PRECISION MODE,
. 0 TO 20 MHz PIXEL RATE IN DOUBLE
PRECISION MODE
. FORWARD AND INVERSE 8 x 8 TRANS-
FORM
. 9-BIT TWO’S COMPLEMENT PIXEL FORMAT
. 12-BIT TWO’S COMPLEMENT COEFFICIENT
FORMAT
. OPTIMIZED ACCURACY FOR 8-BIT TWO’S
COMPLEMENT PIXEL FORMAT
. SELECTABLE SCANNING OF COEFFICIENT
BLOCKS
. FULLY TTL AND CMOS COMPATIBLE
. CMOS TECHNOLOGY
. SINGLE +5 VOLT POWER SUPPLY
. MAXIMUM POWER DISSIPATION : 750mW
AT 27MHz
DIP40
(Plastic Package)
DESCRIPTION
The STV3208 is a dedicated circuit for the 8 x 8
discrete cosine transform(DCT) computation.Two-
dimensional forward DCT (FDCT) or inverse DCT
(IDCT) is performed for 8 x 8 block sizes and a pixel
rate up to 27MHz. The circuit architecture is fully
bidirectional with 9-bit magnitude pixel data bus
and a 12-bit magnitude coefficient data bus pro-
grammed as input or output depending on the
selection of FDCT or IDCT.
Pixel Bus
Coefficient Bus
FDCT
Input
Output
IDCT
Output
Input
Data Format
9-bit 2’s
Complement
12-bit 2’s
Complement
For the forward transform, the input pixels are
coded on 9-bit 2’s complement and the output
coefficients are coded on 12-bit 2’s complement.
For the inverse transform, the data format is iden-
tical with the coefficients used as input and the
pixels used as output.
Two operating modes are provided : single preci-
sion mode at a pixel rate up to 27 MHz, and double
precision mode at a pixel rate up to 20 MHz.
PQFP44
(Plastic Package)
ORDER CODES
Part
Number
STV3200CP
STV3200CV
Temperature
Range
0 to 70oC
0 to 70oC
Package
DIP 40
PQFP44
July 1992
1/17
Free Datasheet http://www.datasheet4u.net/


STMicroelectronics Electronic Components Datasheet

STV3208 Datasheet

8 x 8 DISCRETE COSINE TRANSFORM

No Preview Available !

STV3208
PIN CONNECTIONS
DIP40
V SS
NC
NC
D0
D1
D2
D3
D4
D5
D6
D7
D8
PR
DSYNC
VCC
NC
S/D
F/I
OE
V SS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
PQFP44
VCC
F0
F1
F2
F3
F4
F5
F6
F7
F8
F9
F10
F11
FSYNC
CSS
VSS
NC
TEST
EN
CLK
RESERVED
S/D
F/I
OE
VSS
RESERVED
CLK
EN
TEST
RESERVED
RESERVED
11 10 9 8 7 6 5 4 3 2 1
12 44
13 43
14 42
15 41
16 40
17 39
18 38
19 37
20 36
21 35
22 34
23 24 25 26 27 28 29 30 31 32 33
RESERVED
RESERVED
D1
D0
VSS
VCC
F0
F1
F2
F3
RESERVED
PIN IDENTIFICATION
Pin Number
4-12
13
14
17
18
19
21
22
23
26
27
28-39
1,20,25
15,40
2,3,24
Symbol
D0 to D8
PR
DSYNC
S/D
F/I
OE
CLK
EN
TEST
CSS
FSYNC
F0 to F11
VSS
VCC
NC
Type
I/O
Input
I/O
Input
Input
Input
Input
Input
Input
Input
I/O
I/O
Power
Power
Function / Description
Pixel data bus
Pixel range selection
Pixel block synchronization signal
Single/double precision selection
FDCT/IDCT selection
Output three-state control
Clock signal
Clock enable signal
Test mode selection
Zig Zag selection
Coefficient block synchronization signal
Coefficient data bus
Ground
Power supply
Not Connected
2/17
Free Datasheet http://www.datasheet4u.net/


Part Number STV3208
Description 8 x 8 DISCRETE COSINE TRANSFORM
Maker ST Microelectronics
Total Page 17 Pages
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