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TDA9951 Folha de dados(PDF) 10 Page - NXP Semiconductors |
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TDA9951 Folha de dados(HTML) 10 Page - NXP Semiconductors |
10 / 41 page TDA9951_1 © NXP B.V. 2008. All rights reserved. Product data sheet Rev. 01 — 7 August 2008 10 of 41 NXP Semiconductors TDA9951 CEC/I2C-bus translator The FrameByteCount is the number of bytes in the frame (including the FrameByteCount itself). The service is specified by the ServiceSelector (see Table 15). If an unused ServiceSelector is sent to the TDA9951, it responds with the confirm Bad.req service (see Table 17, Table 28, Table 32 and Table 36). The remaining bytes of the frame can contain up to 17 parameters associated with the service. Services do not have optional parameters. The TDA9951 only accepts one outstanding request. The data service provided using the common data registers comprises: • Host to the TDA9951: requests. – A request is sent from the host to the TDA9951 or to a device on one of its interfaces. • TDA9951 to the host: confirmations, indications and errors. – Confirmations are used to answer requests for status and flow control, to show if the request has been passed on to the intended recipient or if it has been accepted/rejected. – Indications are messages from the TDA9951 interface to the host. Generally relating to normal operation. – Errors are messages from a TDA9951 to the host. Generally relating to an error state. Table 15 lists the data services and their ServiceSelector values. The contents of each service is described in detail in the following Protocol Layer sections. Fig 3. Frame format for the data register protocol Table 15. Data services ServiceSelector Host to TDA9951 TDA9951 to host Message type 00h CECData.req request 01h CECData.cnf confirmation 02h VFDData.req request 03h VFDData.cnf confirmation 04h RTCData.req request 05h RTCData.cnf confirmation 06h SBYData.req request 07h SBYData.cnf confirmation 08h KEYData.req request 09h KEYData.cnf confirmation 81h CECData.ind CEC indication, no error 001aai277 Register 07h FrameByteCount Register 08h ServiceSelector Register 09h [Parameter] [...] [...] [...] [...] |
Nº de peça semelhante - TDA9951 |
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Descrição semelhante - TDA9951 |
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