TMPM330 - Keil

Slave mode ( = “0”)
Under development
TMPM330 (rev 0.4) 10-23
TMPM330
In the slave mode, the SBI generates the INTSBIx interrupt request on four occasions: 1)
when the SBI has received any slave address from the master, 2) when the SBI has
received a general-call address, 3) when the received slave address matches its own
address, and 4) when a data transfer has been completed in response to a general-call.
Also, if the SBI detects Arbitration Lost in the master mode, it switches to the slave mode.
Upon the completion of data word transfer in which Arbitration Lost is detected, the INTSBIx
interrupt request is generated, is cleared to “0,” and the SCL pin is pulled to the “L”
level. When data is written to or read from SBIxDBR or when is set to “1,” the SCL
pin is released after a period of tLOW.
In the slave mode, the normal slave mode processing or the processing as a result of
Arbitration Lost is carried out.
SBIxSR , , and are tested to determine the processing required.
Table 15-19 shows the slave mode states and required processing.
Example: When the received slave address matches the SBI's own address and the
direction bit is “1” in the slave receiver mode.
INTSBIx interrupt
if TRX = 0
Then go to other processing
if AL = 1
Then go to other processing
if AAS = 0
Then go to other processing
SBIxCR1 ← X X X 1 0 X X X Sets the number of bits to be transmitted.
SBIxDBR ← X X X X 0 X X X Sets the transmit data.
(Note) X: Don’t care
Serial Bus Interface (SBI)