Embedded Software for SoC - Grupo de Mecatrônica EESC/USP

104 Chapter 8
Split: to stop the current transaction. The bus will memorize the state of
the bus write transaction.
Retry: the slave access notifies the bus that it can resume the transaction.
Thus a new write query is done which deduces the already transmitted
bytes.
Error: notifies the bus that the transaction can not be accepted. It will have
to retry it.
Ok notifies the bus that the transaction is completed. When the last the
bus write transaction of the macro transaction has completed, the bus
returns from write_txs, allowing the master access to call the slave IP
operation.
The same schema applies to the macro read transaction called once the
operation of the slave IP has completed. One may derive the slave access
class to use a specific statistical model for the consumption of the data by
the slave.