SAA7114H multi-standard video decoder

The SAA7114H is a multi-standard video decoder that supports I2C bus control. It is designed to convert various TV signal inputs into a standardized YUV format. The schematic diagram of the application circuit is shown in the figure below.

SAA7114H Multi-Standard Video Decoding Circuit (a)

Pin 1 (25) (51) (75) (VDDDEl/2/3/4): Digital circuit power supply, operating at 3.3V, supplied by U703 in the power management circuit.

Pin 11 (17) (23) (VDDA2/1/0): Analog circuit power supply, also 3.3V, provided by U703.

Pin 33 (43) (58) (68) (83) (93) (VDDDl1/12/13/14/15/16): Power supply for digital format circuits, 3.3V, sourced from the same power management unit U703.

Pin 8 (VDDX): Clock oscillation circuit power supply, 3.3V, also provided by U703.

SAA7114H Multi-Standard Video Decoding Circuit (b)

Pin 20 (AI11): Input for the Y (luminance) signal, sourced from the S-terminal.

Pin 16 (AI21): Input for the C (chrominance) signal, also from the S-terminal.

Pin 12 (AI23): AV1 video signal input, connected via an external AV jack.

Pin 31 (SCL): I2C clock line, connected to pin 207 of U400 (gm5010).

Pin 32 (SDA): I2C data line, connected to pin 208 of U400 (gm5010).

Pin 27 (CE): Reset voltage input, connected to pin 13 of U400 (grn5010).

Pin 7 (XTALI): Clock input, using an external 24.576MHz voltage-controlled crystal oscillator.

Pin 6 (XTALO): Clock output, also connected to the same external crystal oscillator.

Pins 54–62: Output 8-bit YUV data signals, routed to pins 107–116 of U400 (gm5010).

Pin 97 (TRST): Grounded.

Pin 80 (XTRI): Grounded.

Pins 13, 14, 18, 19: External filter capacitors.

Pins 9, 15, 24, 21, 26, 50, 76, 100, 38, 63, 88, 5: Ground connections.

This detailed pin configuration and circuit design make the SAA7114H a versatile component for video processing applications, especially in systems requiring multiple video input standards. Its integration with I2C allows for flexible control and configuration, making it ideal for use in modern multimedia devices.