Ground Configuration; Computer Telephony Bus; Clock Routing Configuration - Advantech CompactPCI MIC-3000 Series User Manual

6u-8-slot backplane with ct bus and rear i/o for compactpci modular industrial computer

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2.3 Ground Configuration

Along the top and bottom of the MIB- 3081A are 18 mounting holes. The holes are

arranged in an alternating pattern of chassis (frame) grounded pads and logic

grounded pads. The square pad holes are connected to chassis ground, and the round

pad holes are connected to logic ground. To isolate chassis and logic grounds, install

mounting screws in only square pad mounting holes.

The MIB- 3081A provides H.110 CT bus on the P4 connectors, which complies with the

PICMG 2.5 Computer Telephony Specification. The CT bus is routed across the P4

connectors on the peripheral slots. Please refer to Appendix A for pin assignment

information.

The MIB- 3081A is configured to comply with the clock routing specified in the

CompactPCI Hot Swap Specification, PICMG 2.1, version 1.0. This Specification

requires that each slot be independently clocked. If users would like to reconfigure the

backplane to comply with the earlier CompactPCI Specification, PICMG 2.0, version 2.1,

which allows the MIB-3081A to be backward compatible with CPUs using shared

clocks, please contact Advantech for help.

MIB- 3081A User Manual --- Page 10

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