TDA9950TT Просмотр технического описания (PDF) - NXP Semiconductors.

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производитель

TDA9950TT

CEC/I2C-bus translator

NXP Semiconductors. 

NXP Semiconductors

TDA9950

CEC/I2C-bus translator

Table 15. CEC Data services

ServiceSelector From host to TDA9950

00h

CECData.req

01h

81h

82h

83h

From TDA9950 to host

CECData.cnf

CECData.ind

(indication, no TDA9950 error)

CECData.err

(no indication, TDA9950 error)

CECData.ier

(indication, TDA9950 error)

Section

8.5.1

8.5.2

8.5.3

8.5.4

8.5.5

8.5.1 CECData.req service

This service is used to transfer CEC message data. The parameters for the service are

shown in Table 16. Transmission of the CEC message commences as soon as the

complete message has been received by the TDA9950 (subject to the appropriate Signal

Free Time rules being satisfied).

Table 16. Parameters for CECData.req service

Parameter

Comments

AddressByte

Source and destination logical addresses in the form SSSS DDDD

DataBytes

Bytes of message data up to the data length indicated by FrameByteCount

8.5.2 CECData.cnf service

This service is used by the TDA9950 to inform the host of the success or other result of a

CECData.req service. The parameters are shown in Table 17.

Table 17. Parameters for CECData.cnf service

Parameter

Comments

Value

ResultCode

A value indicating the result 00h

of the transmission

80h

81h

82h

83h

84h

85h

86h

Meaning

Success

TDA9950 in off state

Bad .req service

Failed, unable to access CEC line

Failed, arbitration error

Failed, bit timing error

Failed, destination address not

acknowledged

Failed, data byte not acknowledged

8.5.3 CECData.ind service

This service is used to transfer a CEC message, received from a remote device, to the

host. The parameters are listed in Table 18.

TDA9950_2

Product data sheet

Rev. 02 — 22 October 2009

© NXP B.V. 2009. All rights reserved.

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