VSBC-32
Introduction
ID 21168, Rev. 04
Page 1 - 6
©
PEP Modular Computers GmbH
Maximum one CXM-SIO3 module can be controlled by a VSBC-32(E) board. The CXM-
SIO3 module provides access to internal communication signals of the base board that
are transferred to the module via the CXC bus.
For a detailled list and description of the frontpanel interface and serial interface/com-
munication piggybacks please refer to the “Serial Interface Piggybacks” appendix of this
manual as well as to the CXM-SIO3 user’s manual and its “Serial Communications Pig-
gybacks” appendix respectively.
1.2.4
Memory Piggybacks
The VSBC-32(E) mainboard is not provided with any on-board DRAM/flash. These are
provided by special memory piggybacks (DM60x). By means of these piggybacks the
following memory configurations are possible:
•
≤
64MB of DRAM
•
≤
4MB of flash/EPROM
For a detailled description of the memory piggybacks please refer to the “Memory Pig-
gybacks” appendix of this manual.
1.2.5
System-Relevant Information
System Configuration
Up to twenty-one VSBC-32(E) boards can be installed in a VMEbus 3U rack. Please
refer to the description of the VMEbus backplane connector in the Functional Descrip-
tion chapter of this manual. If used as a system controller, the board should be always
installed in the system slot.
If a CXM-SIO3 or a CXM-SCSI module is used in combination with the VSBC-32(E), the
module can be “sandwiched” with the controller, Communication between the controller
and the I/O module being acchieved via the VSBC-32(E)’s on-board CXC connector.
Master/Slave Functionality
The VSBC-32(E) is a combined system and communications controller board provided
with both a VMEbus backplane interface which can operate both as a VMEbus master
and slave simultaneously. Thanks to this feature all twenty-one VSBC-32(E) boards
possible in a VMEbus system can operate as VMEbus masters while at the same time
sixteen of them can act as VMEbus slaves. The VSBC-32(E) VMEbus master/slave (or
neither) operation is a function of the application software.
Bootstrap Loader
Via the VSBC-32(E) frontend serial interface connectors the flash memory of the
board’s memory piggyback can be re-programmed by means of the Bootstrap Loader
which is delivered already installed in the DM60x memory piggybacks. This standalone
software has the capability of loading flash memory from Motorola S-records or from
any absolute address. If the downloaded image does not work properly, the Bootstrap
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