CP-850FX Service Manual
Europe R&D
19
interface and receives/transmits data via I 2 C-firmware user-interface. The slicer combined with
dedicated hardware stores TTX data in a VBI buffer of 1 Kilobyte. The Microcontroller firmware
performs all the acquisition tasks (hamming-and parity-checks, page search and evaluation of
header control bits) once per field. Additionally, the firmware can provide high-end Teletext-
features like Packet-26-handling, FLOF, TOP and list-pages.
4.1.3 IC MARKING AND VERSION
Chassis
IC
marking
OSD languages
ATSS countries
Text
CP850FX
SDA555X
FL
BULGARIAN,
CZECH, GERMAN,
DANISH, SPANISH,
FRENCH, FINNISH,
ENGLISH, GREEK,
HUNGARIAN,
ITALIAN,
NORWEGIAN,
DUTCH, POLISH,
ROMANIAN,
RUSSIAN,
SWEDISH,
SLOVAKIAN.
Austria, Belgium,
Switzerland, Czech
Republic, Germany,
Denmark, Spain,
France, Finland, GB,
Greece, Hungary, Italy,
Ireland, Norway,
Netherlands, Portugal,
Poland, Sweden,
Slovak Republic,
Others
PAN-EUROPEAN
LATIN, CYRILLIC,
GREEK.
4.1.4 PINNING
PSDIP 52-pin
Pin Name
Type
Short Description
1
SCL
IN/OUT Software driven I2C bus Clock line
2
SDA
IN/OUT Software driven I2C bus Data line
3
S/SW2
IN
Slow switching control for SCART 2.
4 S/SW2
IN
(See
Microcontroller I/O pin configuration
)
5
S/SW1
IN
Slow switching control for SCART 1.
6 S/SW1
IN
(See
Microcontroller I/O pin configuration
)
7 n.c.
8
Reset Out
OUT Driven by controlling software to reset video IC’s.
9
VDD2.5
IN
Supply voltage 2.5V
10 VSS
IN
Ground
(0V)
11 VDD3.3
IN
Input/Output
3.3V
12
CVBS
IN
CVBS input for the acquisition circuit
13
VDDA2.5
IN
Supply voltage for analog components
14
VSSA
IN
Ground for analog components
15
AFT
IN
ADC input, AFT input
16
AGC
IN
ADC input, for AGC alignment only
17
KEY
IN
ADC input, local key sensing
18 OCP
IN
Switch Off the set when the voltage goes below a
trigger level
19 HS
IN
Horizontal
sync
for OSD/Txt synchronisation
20
VS
IN
Vertical sync for OSD/Txt synchronisation
21 MODESW
OUT
High : Negative video modulation (B, G, D, K,I)
Low : Positive video modulation (L / L’)
22
L/L’
OUT High : L’, Low : L
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