Raven Registers

 

 

DPAR

Data Parity Detected. This bit is set when three

 

conditions are met: 1) the Raven asserted PERR∗ itself or

 

observed PERR∗ asserted; 2) the Raven was the PCI

 

master for the transfer in which the error occurred; 3) the

 

PERR bit in the PCI Command register is set. This bit is

 

cleared by writing it to 1; writing a 0 has no effect.

SELTIM

DEVSEL Timing. This field indicates that the Raven will

 

always assert DEVSEL∗ as a ‘medium’ responder.

SIGTA

Signalled Target Abort. This bit is set by the PCI slave

 

whenever it terminates a transaction with a target-abort.

 

The bit is cleared by writing it to 1; writing a 0 has no

 

effect.

RCVTA

Received Target Abort. This bit is set by the PCI master

 

whenever its transaction is terminated by a target-abort.

 

The bit is cleared by writing it to 1; writing a 0 has no

 

effect.

RCVMA

Received Master Abort. This bit is set by the PCI master

 

whenever its transaction (except for Special Cycles) is

 

terminated by a master-abort. The bit is cleared by writing

 

it to 1; writing a 0 has no effect.

SIGSE

Signaled System Error. This bit is set whenever the

 

Raven asserts SERR∗. The bit is cleared by writing it to 1;

 

writing a 0 has no effect.

RCVPE

Detected Parity Error. This bit is set whenever the

 

Raven detects a parity error, even if parity error checking

 

is disabled (see bit PERR in the PCI Command register).

 

The bit is cleared by writing it to 1; writing a 0 has no

 

effect.

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Motorola MVME2300 Series manual Dpar, Seltim, Sigta, Rcvta, Rcvma, Sigse, Rcvpe