Software Support Considerations

MPU Off-board Error

Description:

An error occurred while the MPU was attempting to access an off-board resource.

MPU Notification:

TEA is asserted during off-board access.

Status:

Bit 8 of the MPU Status and DMA Interrupt Count Register. Address

$FFF40048.

Comments:

This can be caused by a VMEbus time-out, a VMEbus BERR, or an MVME172 VMEbus access time-out. The latter is the time from when the VMEbus has been requested to when it is granted.

MPU TEA - Cause Unidentified

Description:

An error occurred while the MPU was attempting an access.

MPU Notification:

TEA is asserted during an MPU access.

Status:

Bit 10 of the MPU Status and DMA Interrupt Count Register at address $FFF40048 in the VMEchip2.

Comments:

No status was given as to the cause of the TEA assertion.

MPU Local Bus Time-out

Description:

An error occurred while the MPU was attempting to access a local resource.

MPU Notification:

TEA is asserted during the MPU access.

1

http://www.mcg.mot.com/literature

1-51

Page 69
Image 69
Motorola MVME172 manual MPU Off-board Error, MPU TEA Cause Unidentified, MPU Local Bus Time-out