Motorola MVME1X7P User Manual
Error Conditions
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MPU Local Bus Time-out
DMAC VMEbus Error
DMAC Parity Error
Description:
An error occurred while the MPU was attempting to access
a local resource.
a local resource.
MPU Notification:
TEA is asserted during the MPU access.
Status:
Bit 7 of the MPU Status and DMA Interrupt Count register
(actually in the DMAC Status register).
Address
(actually in the DMAC Status register).
Address
$FFF40048
Comments:
The Local Bus timer timed out. This usually indicates the
MPU tried to read or write an address at which there was
no resource. Otherwise, it indicates a hardware problem.
MPU tried to read or write an address at which there was
no resource. Otherwise, it indicates a hardware problem.
Description:
The DMAC experienced a VMEbus error during an
attempted transfer.
attempted transfer.
MPU Notification:
DMAC interrupt (when enabled)
Status:
The VME bit is set in the DMAC Status register (address
$FFF40048 bit 1).
$FFF40048 bit 1).
Comments:
This indicates the DMAC attempted to access a VMEbus
address at which there was no resource or the VMEbus
slave returned a BERR
address at which there was no resource or the VMEbus
slave returned a BERR
∗
signal.
Description:
Parity error while the DMAC was reading DRAM.
MPU Notification:
DMAC interrupt (when enabled)
Status:
The DLPE bit is set in the DMAC Status register (address
$FFF40048 bit 5).
$FFF40048 bit 5).
Comments:
If the TBL bit is set (address $FFF40048 bit 2), the error
occurred during a command table access; otherwise the
error occurred during a data access.
occurred during a command table access; otherwise the
error occurred during a data access.