Cvb Configuration; Functional Description - EKE-Electronics CVB1621A Technical Manual

2.2 CVB configuration

The CVB module configuration is done through the Gateway CPU, and the CVB reads
it through its shared memory at the start-up of the system.The configuration is for the
CVB module read-only, and only managed by the CPU software. If any changes are
made through the debug terminal, the original configuration is retained when the
module is reset.

2.2.1 Functional description

The module there is a Euro 1 size (160x100mm) circuit board which contains (Refer to
2.4 on page 9):
Power supply circuitry
Two (2) CAN bus interfaces
Download and Debug Terminal interface (X4 DLOAD)
Host CPU (Z180) processor
Two (2) CAN Controllers (SJA 1000)
VME Bus interface
The following figure presents a general diagram of the CVB module functionality. For
a more detailed block diagram, see Appendix B.
Download/Debug
Terminal interface
(X4 DLOAD)
Figure 2.1: General functionality diagram of then CVB module
CVB1621A and CVB2456A Technical Manual, ver. 3.00
VME Bus
VME Bus Slave Logic
HOST CPU
(Z180)
CAN Controller
CAN Controller
(SJA 1000)
(SJA 1000)
CAN A CAN B
Bus interface (X1) Bus interface (X2)
Overview of the CVB
Shared memory
CAN BUS B
CAN BUS A
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