Changhong Electric PF29T18 Service Manual page 24

Chassis no. ch-20
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Symbol
CVBS2
GND
CVBS3/Y
C
WHSTR
CVBSO
AUDOUT /AMOUT
SVM
INSSW2
R2/VIN
G2/YIN
B2/UIN
BCLIN
BLKIN
RO
GO
BO
VDDA
VPE
VDDC
OSCGND
XTALIN
XTALOUT
RESET
VDDP
P1.0/INT1
P1.1/T0
P1.2/INT0
P1.3/T1
P1.6/SCL
P1.7/SDA
P2.0/TPWM
P2.1/PWM0
P2.2/PWM1
P2.3/PWM2
P2.4/PWM3
P2.5/PWM4
SYNC_FILTER
P3.0/ADC0
Note:
1. The functional content of these pins is dependent on the envelope (SDIP-64 or QFP-80), the mode of
operation and on some I
SERVICE MANUAL
Pin
QFP-80 SDIP-64
42
-
external CVBS2 input
43
-
ground for TV-processor
44
42
CVBS3/Y input
45
43
chroma input
46
-
white stretch capacitor
47
-
CVBS output
48
-
audio output /AM audio output (volume controlled)
49
44
scan velocity modulation output
50
45
2nd RGB / YUV insertion input
51
46
2nd R input / V (R-Y) input / PR input
52
47
2nd G input / Y input
53
48
2nd B input / U (B-Y) input / PB input
54
49
beam current limiter input
55
50
black current input / V-guard input
56
51
Red output
57
52
Green output
58
53
Blue output
analog supply of Teletext decoder and digital supply of
59
54
TV-processor (3.3 V)
60
55
OTP Programming Voltage
61
56
digital supply to core (3.3 V)
62
57
oscillator ground supply
63
58
crystal oscillator input
64
59
crystal oscillator output
65
60
reset
66
61
digital supply to periphery (+3.3 V)
67
62
port 1.0 or external interrupt 1 input
68
63
port 1.1 or Counter/Timer 0 input
69
64
port 1.2 or external interrupt 0 input
70
1
port 1.3 or Counter/Timer 1 input
71
2
port 1.6 or I
72
3
port 1.7 or I
73
4
port 2.0 or Tuning PWM output
74
-
port 2.1
75
-
port 2.2
76
-
port 2.3
77
-
port 2.4
78
-
port 2.5
79
-
CVBS (i.e. P0.6/CVBS) Sync filter input: This pin should be
connected to VSSA via a 100 nF capacitor.
80
5
port 3.0 or ADC0 input
2
C-bus control bits.
Description
2
C-bus clock line
2
C-bus data line
22

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