Service manual

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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