UNIVERSAL TELETEXT DECODERS
‘EUROTEXT’
‘EUROTEXT’ CF70200
CF70200
DRAFT 11
15-Feb-96 1Q96
1
Eight pages of on-chip display RAM
Europe-wide solution
Automatic FLOF & TOP decoding
Flicker-free packet 26 processing on chip
Program delivery control (PDC)
Minimum software requirement
Menu page capability
Instantaneous page memory clear
75
Direct Drive RGB outputs
Digital PLL
Upgrade path from UNITEXT
Direct access to subtitles
Flexible packaging options: 28 DIL,
44 PLCC
1.0 DESCRIPTION
The CF70200 EUROTEXT device is an eight page
intelligent teletext decoder for use with 625 line TV
transmissions having teletext in the Vertical Blanking
Interval (VBI). When used with an Analogue Interface
device (Texas Instruments’ CF72306 or CF72416), it
provides a flexible teletext solution incorporating
internal software to implement FLOF and TOP teletext
decoding automatically.
Eurotext supports a comprehensive range of 29 West
and East European languages in a single device. A full
list is shown on Page 13. Other devices are available in
this family of teletext devices that will support Cyrillic
and Hebrew languages and VPS data capture (Table 1).
On-chip processing of packet 26 characters (flicker free) is automatically implemented as required.
All packets of type 26 are processed in ‘real time’ without the need for any additional memory. This
allows the decoder to store eight pages of teletext irrespective of the language selected and the mode
of operation. On-chip is an 11.5 MIPs micro-coded processor which controls all the teletext
processing requirements, including ghost row processing and TOP table processing. All teletext data
is processed in ‘real time’.
The control of the device is by high level simple commands for all features.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
15
16
17
18
19
20
21
22
23
24
25
26
27
TEST5
SYNC
VIDEO
DVCC
RSTB
CLKIN
DGND
TEST1
TEST4
TDATA
TCLK
CSB
MUTE
TEST2
BLANK
FLAG2
FLAG1
REF
RGBSET
AGND
RED
GREEN
AVCC
BLUE
SDA
SCL
TEST3
WIND
CF70200 28 pin DIL
---
- R
EF
---
- D
VC
C
---
- N
/C
---
- N
/C
---
- N
/C
---
- F
LA
G
2
---
- F
LA
G
1
---
- N
/C
---
- V
ID
EO
---
- S
YN
C
---
- T
ES
T5
TC
LK
--
--
C
SB
--
--
N/
C
---
-
M
UT
E
---
-
TE
ST
2
---
-
W
IN
D
---
-
TE
ST
3
---
-
N/
C
---
-
SC
L
---
-
SD
A
---
-
N/
C
---
-
RGBSET
AGND
N/C
N/C
N/C
N/C
RED
GREEN
AVCC
BLUE
BLANK
DVCC
RSTB
N/C
N/C
N/C
N/C
CLKIN
DGND
TEST1
TEST4
TDATA
CF70200 44 pin PLCC
6 5 4 3 2 1 44 43 42 41 40
18 19 20 21 22 23 24 25 26 27 28
7
8
9
10
11
12
13
14
15
16
17
29
30
31
32
33
34
35
36
37
38
39