Improved VXI bus multi-module carrier plate
A multi-module, carrier board technology, applied in static memory, instruments, etc., can solve the problems of small addressing space, limited instrument function, complex design, etc., to expand the available storage space, avoid complicated processes, and increase the useful area Effect
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[0036] figure 1 It is the composition block diagram of HP E2251A M module carrier board of HP Company. The carrier board and M module are cross-connected through double-row 40-core sockets. See Table 1 for pin signal definitions.
[0037] The carrier board provides four A16 configuration registers required by the VXI bus specification for each M module: identification register (00h), type register (02h), status / control register (04h), and A24 base address register (06h). When powering on, the carrier board reads the contents of the EEPROM on the mounted M module from the FEH address of the M module, and stores the ID code and type code in the identification register and type register. After the A24 base address is allocated by the VXI resource manager, use the A16 operation to write the A24 base address register to control the A24 addressing. Since the configuration information including multiple different data must be read out from the same FEH address of the M module during...
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