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TDA9951 Scheda tecnica(PDF) 10 Page - NXP Semiconductors

Il numero della parte TDA9951
Spiegazioni elettronici  CEC/I2C-bus translator
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Produttore elettronici  PHILIPS [NXP Semiconductors]
Homepage  http://www.nxp.com
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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]
[...]
[...]
[...]
[...]


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