Service manual

CP-850/F Service Manual
-54-
5.4.2 ACQUISITION FEATURES
Multistandard Digital Data Slicer
Parallel Multi-norm Slicing (TTX, VPS, WSS)
Four Different Framing Codes Available
Data Caption only Limited by available Memory
Programmable VBI-buffer
Full Channel Data Slicing Supported
Fully Digital Signal Processing
Noise Measurement and Controlled Noise Compensation
Attenuation Measurement and Compensation
Group Delay Measurement and Compensation
Exact Decoding of Echo Disturbed Signals
5.4.3 PORTS
One 8-bit I/O-port with open drain output and optional I 2 C Bus emulation support (Port 0)
Two 8-bit multifunction I/O-ports (Port 1, Port 3)
One 4-bit port working as digital or analogue inputs for the ADC (Port 2)
One 2-bit I/O-port with secondary functions (P4.2, 4.3, 4.7)
5.4.4
-CONTROLLER I/O PIN CONFIGURATION AND FUNCTION TABLE
PIN NAME
CONFIGURATION
DESCRIPTION
STAND BY TV ON
3 S/SW2 Open Drain Open Drain
4 S/SW2 Open Drain Open Drain
5 S/SW1 Open Drain Open Drain
6 S/SW1 Open Drain Open Drain
8 RESET out Low Open Drain Reset video IC’s
15 AFT High impedance High impedance AFT input? ADC input
16 AGC in High impedance High impedance AGC input ? ADC input
17 KEY High impedance High impedance Keyboard input ? ADC input
18 OCP High impedance High impedance Over Current Protection ? Switch
21 Mod SW High impedance Push Pull High = Negative modulation, Low =
Positive modulation (L/L’).
22 SECAM L’ High impedance Push Pull Low = L, High =L’
23 IR High impedance High impedance Infrared Interrupt input
24 SOUND INTInput input Sound interrupt input-edge triggered
48 AGC out -- PWM out Control tuner AGC (TOP)
51 LED Push Pull Push Pull Low : LED Red
High : LED Green
52 Power Push Pull - Low Push Pull - High SMPS operation mode (Burst/ ON)
L L Tuner
L H AV2-16/9
H L AV2-4/3
H H AV2-4/3
4 3 Source
L L Tuner
L H AV1-16/9
H L AV1-4/3
H H AV1-4/3
6 5 Source