TDA9950

General description

The TDA9950 is a single-chip CEC/I²C-bus translator with a processor, dedicated to the control and interfacing of the Consumer Electronics Control (CEC), a feature of the High-Definition Multimedia Interface (HDMI).

The TDA9950 is an interface between the CEC protocol and timings and the standard I²C-bus. A message received on the I²C-bus interface is written in a buffer and sent on the CEC line. A message received from the CEC line is stored in a buffer, and an interrupt is generated indicating that a message can be read via the I²C-bus. To reduce its power consumption the TDA9950 sets itself to Idle mode when there is no message on the CEC line nor on the I²C-bus.

Features

Principal features

• Receive and transmit CEC messages with compliant Signal Free Time handling
• I²C-bus interface to host supporting 100 kbit/s and 400 kbit/s communication
• Supports multiple CEC logical addresses
• Supports CEC messages up to 16 bytes in length
• Programmable retry count
• Comprehensive arbitration and collision handling
• 3.0 V to 3.6 V V_DD operating range
• Automatic Idle mode to reduce power consumption when there is no message on CEC line and I²C-bus
• I/O pins are 5 V tolerant

Additional features

• Processor with embedded software to control the interface between CEC line and I²C-bus
• Active-LOW reset input and on-chip power-on reset allows operation without external reset components. A reset counter and reset glitch suppression circuitry prevent spurious and incomplete resets.
• On-chip oscillator for 12 MHz crystal
• Schmitt trigger port inputs

Products/packages

Products in the above table are all in production. Some variants are discontinued; click here for information on these variants.

Pricing/ordering/availability

Applications

• All devices using an HDMI connector
• YC_BC_R or RGB high-speed video digitizer
• Projector, plasma and LCD TV
• Rear-projection TV
• High-end TV
• Home-theater amplifier
• DVD recorder

Design support

Application Notes

AN10302_4; Using the Philips LPC2000 Flash utility with the Keil MCB2100 and IAR LPC210x Kickstart evaluation boards (12-Oct-06)

Support Documents

TN06004_LPC2000_ADC; LPC2000 ADC code example (2006-03-27)

TN06002_LPC2000_EINT; LPC2000 EINT dual edge interrupts (2006-02-22)

TN06005_LPC2000_I2C; LPC2000 I2C slave code example (2006-04-21)

TN06008_LPC2000_SPI; LPC2000 SPI slave code example (2006-06-16)

MACC06001_LPC2000_SPI; LPC2xxx SPI master code example (2006-01-20)

MACC05007_LPC2000_UART; LPC2xxx UART transmitter code example (2005-09-19)

TN06003_LPC900_Resonator; LPC900 Mechanical stress on resonator (2006-03-30)

75016217; NXP HDMI transmitters TDA9981, TDA9983 and TDA9984 (2007-12-01)

MACC05009_P89V51Rx2; P89(L)V51Rx2 Code security (2005-11-25)

TN06007_V51RX2_Migration; V51RX2 Migration (2006-06-01)

TN06006_V66x_Migration; V66x Migration (2006-06-01)

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