TMPA8823 pin function and voltage data

Filter 18.432M

MCU Section:
- Pin 2: MAIN -DET I – An 8-bit A/D converter input port for AC power voltage sampling. The sampled signal is sent to a comparator, and the CPU processes it to display the AC voltage value.
- Pin 3: KEY I – An 8-bit A/D converter input used for detecting the key matrix on the panel. This analog voltage is converted, compared, and used by the CPU to identify which key is pressed.
- Pin 4: uP DVss – Ground connection for the digital circuit block.
- Pin 5: Reset I/O – Input for the reset signal and output for the system clock.
- Pins 6 & 7: Xout/Xin OI – Crystal connection pins, connected to an 8MHz crystal.
- Pin 8: TEST I – Test signal output pin; grounded when not in test mode.
- Pin 9: uP DVdd – Power supply for the digital circuit block, providing 5V.
- Pin 10: uP V-Vss – Ground for the CCD circuit block.
- Pin 54: uP AGND – Ground for the oscillation circuit block.
- Pin 55: uP AVdd – Power supply for the oscillation circuit block, providing 5V.
- Pin 56: NC – Reserved pin.
- Pin 1: U/VO – 8-bit D/A conversion (PWM) or band selection signal.
- Pin 61: H/LO – 57 SDA I/O – I2C bus serial data input/output.
- Pin 58: SCL I/O – I2C bus serial clock input/output.
- Pin 59: System O – 7-bit D/A conversion (PWM) or sound system selection.
- Pin 60: VT O – 14-bit D/A conversion (PWM) or high-frequency tuner tuning voltage output.
- Pin 62: TV sync. I – External interrupt or count input pin, used for composite sync signal input.
- Pin 63: RMT-In I – Remote control signal input.
- Pin 64: LED O – Standby output for LED drive, power operation, reset control, and mute control signal processing.
- Pin 11: TV AGND – Ground for the analog circuit block.
- Pin 12: FBP In I – FBP reverse pulse input terminal.
- Pin 13: H Out O – Row drive pulse output terminal.
- Pin 14: HAFC 1 – Line AFC circuit external filter connection terminal. The voltage at this pin controls the H-VCO frequency.
- Pin 15: V saw I – Connects to an external sawtooth wave to form a capacitor. The amplitude of the sawtooth wave is controlled by the V-AGC function to maintain a constant level.
- Pin 16: V out O – Field drive pulse output terminal.
- Pin 17: H Vcc – 9V power supply for the deflection circuit (DEF).
- Pin 18: NC – Reserved.
- Pin 19: Cb In I – Input terminal for the Cb color difference component signal.
- Pin 20: Y In I – Input terminal for the Y signal.
- Pin 21: Cr In I – Input terminal for the Cr color difference component signal.
- Pin 22: TV DGnd – Ground wire connected to the digital circuit block ground.
- Pin 23: C In I – Chrominance signal input terminal.
- Pin 24: Ex.CVBS/Y In I – External composite video signal input terminal (Ext.CVBS/Ext.Y).
- Pin 25: TV DVcc – 3.3V power supply for the digital circuit block, derived from partial voltage division of H-Vcc.
- Pin 26: TV In I – TV video signal input terminal, receiving a composite video signal processed by an acoustic notch.
- Pin 27: ABCL I – ABCL (Color Saturation, Brightness Limit) signal input.
- Pin 28: AU out O – Audio signal output terminal, sending audio signals to the audio power amplifier circuit.
- Pin 29: IF Vcc – 9V power supply for the IF circuit block.
- Pin 30: TV out O – PIF detection signal (full TV signal) output.
- Pin 31: SIF out O – SIF detection signal (sound second IF signal) output.
- Pin 32: Ext. Au In I – External audio signal input.
- Pin 33: SIF In I – Input for the audio second IF signal.
- Pin 34: DC -NF I – Capacitor connection for AC negative feedback signal.
- Pin 35: PIF -PLL I – Connects to the PIF-PLL loop filter. The voltage at this pin determines the frequency of the PIF-VCO.
- Pin 36: IF Vcc – 5V power supply for the IF circuit block.
- Pin 37: Reg Fil I – Filter capacitor connection to stabilize internal bias.
- Pin 38: De Emphasis I – Connects the SIF detection signal to a weighting capacitor.
- Pin 39: IF AGC I – Connects the IF AGC filter.
- Pin 40: IF GND – Ground terminal for the IF circuit.
- Pins 41 & 42: IF In I – Two input terminals of a differential amplifier, receiving the IF TV signal from a surface acoustic wave filter.
- Pin 43: RF-AGC O – Output RF-AGC control voltage to the high-frequency tuner.
- Pin 44: Y/C Vcc – 5V power supply for the Y/C circuit block.
- Pin 45: A/V Out O – Output CVBS/Y signal.
- Pin 46: Black Det I – Connected to the black level detection filter. The voltage at this pin determines the black level extension threshold.
- Pin 47: Chroma APC I – Connects to the APC filter of the color decoding circuit. The voltage at this terminal determines the oscillation frequency of the VCXO (Crystal Voltage Controlled Oscillator).
- Pin 48: Ik In I – AKB cathode current sampling signal input pin.
- Pin 49: RGB Vcc – 9V power supply for the RGB circuit block.
- Pins 50–52: R/G/B Out O – Output baseband R, G, and B signals to the video amplifier and discharge circuits.
- Pin 53: TV AGND – Ground wire connected to the analog circuit block ground.