Block coherent mode

The exchange of VME and fiber optic data happens asynchronously from each other. This means

that blocks of data that are written on the VME side are not necessarily transported over the

fiber optic telegram as one block. There is only some coherence guaranteed based on the type

of write access that was used (byte, word or dword).

When coherent transmission of a complete block of data is needed, a special ‘Coherent Mode’

could be enabled by setting a DIP switch. Now the VME receive and transmit buffers are only

updated when the user writes to a special Update Register. In this way it is possible to keep

blocks of coherent data together.

32Mbit Flex protocol

Using 32Mbit Flex protocol ibaLink-VME is compatible to all 32Mbit Flex-enabled iba-devices.

ibaLink-VME can be connected within a ring to these devices. But the card cannot communicate

with the other devices, only with the Flex master (at the moment only ibaPDA).