TDA9950_2

© NXP B.V. 2009. All rights reserved.

Product data sheet

Rev. 02 — 22 October 2009

9 of 22

NXP Semiconductors

TDA9950

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).

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.

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.

Table 15.

CEC Data services

ServiceSelector

From host to TDA9950

From TDA9950 to host

Section

00h

CECData.req

8.5.1

01h

CECData.cnf

8.5.2

81h

CECData.ind

(indication, no TDA9950 error)

8.5.3

82h

CECData.err

(no indication, TDA9950 error)

8.5.4

83h

CECData.ier

(indication, TDA9950 error)

8.5.5

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

Table 17.

Parameters for CECData.cnf service

Parameter

Comments

Value

Meaning

ResultCode

A value indicating the result

of the transmission

00h

Success

80h

TDA9950 in off state

81h

Bad .req service

82h

Failed, unable to access CEC line

83h

Failed, arbitration error

84h

Failed, bit timing error

85h

Failed, destination address not

acknowledged

86h

Failed, data byte not acknowledged