TMPA8823 pin function and voltage data

Filter 18.432M

MCU part
2 MAIN -DET I 8bit A/D converter input port for AC power voltage sampling signal input. The sampling signal is sent to the comparator via A/D, and the CPU judges and displays the AC voltage value.
3 KEY I 8bit A / D converter input port, input panel key matrix identification signal, the signal is analog voltage, A/D conversion, comparison, for the CPU to recognize the closed key
4 uP DVss Ground GND/Digital Circuit Block Power Ground
5 Reset I/O reset signal input / system clock output
6, 7 XoutXin OI crystal connection pin, connected to 8MHz crystal
8 TEST I Test signal output pin / grounded in non-test state
9 uP DVdd power supply to 5V working power supply of digital circuit block
10 uP V-Vss ground CCD circuit block ground
54 uP AGND Ground oscillating circuit block ground
55 uP AVdd power supply oscillation circuit block 5V power supply
56 NC reserved 1 U/VO 8bit D/A conversion (PWM) / band selection signal
61 H/LO 57 SDA I/O I2C bus serial data input/output
58 SCL I/O I2C Bus Serial Clock Input/Output 59 System O 7bit D/A Conversion (PWM) / Sound System Selection
60 VT O 14bit D/A conversion (PWM) / high frequency tuner tuning voltage VT output
62 TV sync. I External interrupt or count input pin / for composite sync signal input
63 RMT-In I Remote control signal input 64 LED O Standby output for LED drive/power operation-reset control and mute control signal processing section
11 TV AGND Ground Line Analog Circuit Block Vcc Power Ground
12 FBP In I FBP reverse pulse input terminal
13 H Out O row drive pulse output terminal
14 HAFC 1 I line AFC circuit external filter connection terminal, this terminal voltage controls H-VCO frequency
15 V saw I Connect external sawtooth to form a capacitor. The amplitude of the sawtooth wave is controlled by the V-AGC function and can maintain a constant amplitude.
16 V out O field drive pulse output terminal
17 H Vcc 9V power supply to DEF (deflection circuit) 9 V power supply
18 NC reserved
19 Cb In I Cb color difference component signal input terminal
20 Y In IY signal input terminal
21 Cr In I Cr color difference component signal input terminal
22 TV DGnd ground wire connected to digital circuit block ground wire
23 C In I chrominance signal input terminal
24 Ex.CVBS/Y In I External composite video signal Ext.CVBS/Ext.Y input terminal
25 TV DVcc 3.3V power digital circuit block power terminal, DVcc = 3.3V, can be obtained by partial pressure of H-Vcc
26 TV In I TV video signal input terminal, input composite video signal processed by acoustic notch
27 ABCL I ABCL (Color Saturation, Brightness Limit) Signal Input
28 AU out O audio signal output terminal, output audio signal to audio power amplifier circuit
29 IF Vcc 9V power supply IF circuit block power supply 9V
30 TV out O PIF detection signal (full TV signal) output
31 SIF out O SIF detection signal (sound second IF signal) output
32 Ext. Au In I External audio signal input
33 SIF In I Input Audio Second IF Signal
34 DC -NF I Connection Capacitor for Connecting Acoustic DC Negative Feedback Signal
35 PIF -PLL I Connect PIF- PLL loop filter This pin voltage determines the frequency of PIF-VCO
36 IF Vcc 5V power supply to IF circuit block power supply 5V
37 Reg Fil I Connect Filter Capacitor to Stabilize Internal Bias
38 De Emphasis I Connect SIF detection signal to weighting capacitor
39 IF AGC I Connect IF AGC filter
40 IF GND Ground IF Circuit Ground Terminal
4142 IF In I Pin41, Pin42 are two input terminals of the differential amplifier, input IF TV signal from the surface acoustic wave filter 43 RF-AGC O Output RF -AGC control voltage to high frequency tuner
44 Y/C Vcc 5V power supply connection Y/C circuit block working power supply 5V
45 A/V Out O Output CVBS/Y signal
46 Black Det I is connected to the black level detection filter. The level of Pin46 determines the black level extension threshold.
47 Chroma APC I Connects to the APC filter of the color decoding circuit. This terminal voltage determines the oscillation frequency of the VCXO (Crystal Voltage Controlled Oscillator). 48 Ik In I AKB cathode current sampling signal input pin
49 RGB Vcc 9V power supply connected to RGB circuit block 9V power supply
50 R Out O output baseband R signal to the video amplifier circuit
51 G Out O output baseband G signal to the video amplifier circuit
52 B Out O Output baseband B signal to the video and discharge circuit
53 TV AGND Ground wire connected to analog circuit block ground