SR6001 |
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Document Version [1.00]
3-3. The transaction sequences and the regulations
3-3-1. The transaction sequences
The transactions have three kinds of sequence.
*A transaction is a Command from Host then Slave will be an answer by Status answer, ACK or NAK. *A transaction is a Status request from Host then Slave will be an answer by Status answer or NAK.
*A transaction is Auto status feedback from Slave when a Slave’s status changed. (If the auto status feedback is enabled.)
3-3-2. The transaction regulations
The transactions have some kinds of regulation.
*An answer (ACK, NAK or Status answer) transmittion by Slave has to finish within 500ms when got a Command or a Status request from Host.
*Host must not transmit an another Command or Status request until "it receives a answer by a previous Command or Status request" or "it passes a term of waitinng time from a finishing of previous transmission of a Command or a Status request ".
*Slave has to finish a transaction under 500ms when it sends Auto status feedback data.
3-3-3. Specification of Auto status feedback
There are some specific regulations about Auto status feedback.
*The product status has segmented into four layers of 1, 2, 3 and 4.
*The status of layer 1 are assigned most kindly status to Host. (The statuses of layer 2 are assigned kindly status, the statuses of layer 3 are not so need status to Host and the statuses of layer 4 are probably no wished statuses.)
*Each layer status can control transmit enable or disable by Host command. (The product default would be all disables.)
*Slave sends auto status feedback by itself when the status is changed and if the status feedback is enabled.
*The product defined and segmentationed layers are takeing in status list.
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RxD |
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<Slave>
RxD
TxD
Example of the transactions
Company Restricted
