TDA9950TT NXP [NXP Semiconductors], TDA9950TT Datasheet

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TDA9950TT

Manufacturer Part Number
TDA9950TT
Description
CEC/I2C-bus translator
Manufacturer
NXP [NXP Semiconductors]
Datasheet
1.TDA9950TT.pdf (22 pages)

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1. General description
2. Features
2.1 Principal features
2.2 Additional features
The TDA9950 is a single-chip CEC/I
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
I
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 I
consumption the TDA9950 sets itself to Idle mode when there is no message on the CEC
line nor on the I
I
I
I
I
I
I
I
I
I
I
I
I
I
2
C-bus. A message received on the I
TDA9950
CEC/I
Rev. 02 — 22 October 2009
Receive and transmit CEC messages with compliant Signal Free Time handling
I
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
Automatic Idle mode to reduce power consumption when there is no message on CEC
line and I
I/O pins are 5 V tolerant
Processor with embedded software to control the interface between CEC line and
I
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
2
2
C-bus interface to host supporting 100 kbit/s and 400 kbit/s communication
C-bus
2
C-bus translator
2
C-bus
2
C-bus.
DD
operating range
2
2
C-bus translator with a processor, dedicated to the
C-bus interface is written in a buffer and sent on the
2
C-bus. To reduce its power
Product data sheet

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TDA9950TT Summary of contents

Page 1

TDA9950 CEC/I Rev. 02 — 22 October 2009 1. General description The TDA9950 is a single-chip CEC/I control and interfacing of the Consumer Electronics Control (CEC), a feature of the High-Definition Multimedia Interface (HDMI). The TDA9950 is an interface between ...

Page 2

... DD T amb P tot 2 I C-bus tolerant) pins SDA and SCL f clk 5. Ordering information Table 2. Type number TDA9950TT TDA9950_2 Product data sheet C or RGB high-speed video digitizer R Quick reference data Parameter Conditions supply voltage ambient temperature total power dissipation Operating mode ...

Page 3

NXP Semiconductors 6. Block diagram CEC_OUT CRYSTAL Fig 1. 7. Pinning information 7.1 Pinning Fig 2. 7.2 Pin description Table 3. Symbol RSVD1 INT CEC_OUT TDA9950_2 Product data sheet TDA9950 CEC_IN CEC-BUS DATA RAM XTAL1 CONFIGURABLE XTAL2 OSCILLATOR Block diagram ...

Page 4

NXP Semiconductors Table 3. Symbol RST V SS XTAL1 XTAL2 CEC_IN SDA SCL RSVD2 RSVD3 RSVD4 RSVD5 V DD RSVD6 RSVD7 INT_POL input output power supply. 8. Functional description The TDA9950 ...

Page 5

NXP Semiconductors In case of independent CEC, a system could have up to four TDA9950 devices on the 2 same I The four addresses are defined by the state of the inputs A0 and A1 (logic 1 when connected to ...

Page 6

NXP Semiconductors 8.4 Register descriptions Table 6. Bit Table 7. Bit Table 8. Bit Table 9. Bit TDA9950_2 Product ...

Page 7

NXP Semiconductors Table 10. Bit Table 11. Bit Table 12. Bit Table 13. Bit TDA9950_2 Product data sheet CCR - TDA9950 Control Register (address 03h) ...

Page 8

NXP Semiconductors Table 13. Bit Table 14. Bit 8.5 Data register protocol Communication between the TDA9950 and the host using the CEC Data Registers is carried out using frames of information. The ...

Page 9

NXP Semiconductors Table 15. ServiceSelector 00h 01h 81h 82h 83h 8.5.1 CECData.req service This service is used to transfer CEC message data. The parameters for the service are shown in complete message has been received by the TDA9950 (subject to ...

Page 10

NXP Semiconductors Table 18. Parameter AddressByte DataBytes 8.5.4 CECData.err service This service is used to alert the host to an error condition. There are no parameters. The host should read the TDA9950 Error Register CER for details of the error. ...

Page 11

NXP Semiconductors 8.6 Example communication sequences When writing, the first byte after the slave address will contain the Address Pointer Register value. Subsequent bytes are written to the register addressed by the Address Pointer Register. If the host wishes to ...

Page 12

NXP Semiconductors S SLAVE ADDRESS W A write address pointer '0' (write) from master to slave A = acknowledge (SDA = LOW START condition P = STOP condition R = read W = write Fig 6. Host reads ...

Page 13

NXP Semiconductors • The length of the message is given by the byte in the first CEC Data Register. This will be at least 3 for the shortest message. A value less than 3 indicates an invalid message. • If ...

Page 14

NXP Semiconductors The TDA9950 is now enabled. Messages addressed to logical address Tuner 1 (see HDMI1.3a specification) or STB1 (see HDMI1.2a specification) will be acknowledged and forwarded to the host processor. 8.7.2 Sending a CEC message Example: the host processor ...

Page 15

NXP Semiconductors 9. Limiting values Table 20. Limiting values In accordance with the Absolute Maximum Rating System (IEC 60134). Symbol Parameter T ambient temperature amb T storage temperature stg I HIGH-level output current OH(I/O) per input/output pin I LOW-level output ...

Page 16

NXP Semiconductors 10. Static characteristics Table 21. Static characteristics +70 C for industrial application; unless otherwise specified. DD amb Symbol Parameter V supply voltage DD I supply current ...

Page 17

NXP Semiconductors 11. Dynamic characteristics Table 22. Dynamic characteristics (12 MHz 3 3 +70 C for industrial applications amb Symbol Parameter Glitch filter t glitch rejection time gr ...

Page 18

NXP Semiconductors 13. Package outline TSSOP20: plastic thin shrink small outline package; 20 leads; body width 4 pin 1 index 1 DIMENSIONS (mm are the original dimensions) A UNIT max. ...

Page 19

NXP Semiconductors 14. Revision history Table 23. Revision history Document ID Release date TDA9950_2 20091022 • Modifications: Figure 1 “Block • Figure 2 “Pin • Table 3 “Pin • Table 3 “Pin • Figure 9 “Application TDA9950_1 20071116 TDA9950_2 Product ...

Page 20

NXP Semiconductors 15. Legal information 15.1 Data sheet status [1][2] Document status Product status Objective [short] data sheet Development Preliminary [short] data sheet Qualification Product [short] data sheet Production [1] Please consult the most recently issued document before initiating or ...

Page 21

NXP Semiconductors 17. Tables 1 General description . . . . . . . . . . . . . . . . . . . . . . 1 2 Features . . . . . . . . ...

Page 22

NXP Semiconductors 19. Contents 1 General description . . . . . . . . . . . . . . . . . . . . . . 1 2 Features . . . . . . . . ...

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