MFC2000 Datasheet, PDF (289/426 Pages) List of Unclassifed Manufacturers – Multifunctional Peripheral Controller 2000

Hardware Description
MFC 2000 Multifunctional Peripheral Controller 2000
For keeping track of the transmit and receive activities, the SASIF has four separate interrupts -- the TxBufIRQ,
TxShfIRQ, RxBufIRQ, and RxTimeoutIRQ. Any of these interrupt activate will turn on the IRQSASIF. Following
are the conditions when they are set and cleared:
Activated
when
Deactivated
when
TxBufIRQ
1. the TxBufEmpty status bit is set,
and
2. the TxBufIrqEnb control bit is set.
1. the TxBufEmpty status bit is
cleared, or
2. the TxBufIrqEnb control bit is
cleared.
TxShfIRQ
1. the TxShEmpty status bit is set, and
2. the TxShfIrqEnb control bit is set,
and
1. the TxShEmpty status bit is cleared,
or
2. the TxShfIrqEnb control bit is
cleared.
RxBufIRQ¹
1. the RxBufFull status bit is set, and
2. the RxBufIrqEnb control bit is set.
1. the RxBufFull status bit is cleared, or
2. the RxBufIrqEnb control bit is
cleared.
Activated
when
Deactivated
when
RxTimeoutIRQ
1. the RxTimerElapsed status bit is set, and
2. the RxTimerEnb control bit is set.
1. the RxTimerElapsed status bit is cleared, or
2. the RxTimerEnb control bit is cleared.
Note: The RxBufFull status bit and the RxBufIRQ is valid in the AsyncMode only. During the
SyncMode, data receive to the SASIF is synchronous with the transmit data, therefore, the
RxBufFull status bit and the RxBufIRQ signal is not used in the SyncMode.
100723A
Conexant
15-9