Shb cable assembly, Shb inter modules solutions, Half word interface (16-bit shb interface) – Sundance SMT407 User Manual
Page 20
Version 1.0.0
Page 20 of 38
SMT407 User Manual
SHB Cable Assembly
The cable is custom made by Precision Interconnect and a cable assembly solution
SHB Inter Modules solutions
High-speed data transfer can be achieved between PMC modules thanks to the use
of a 60-way flat ribbon micro-coax cable or via PCB connections.
As a result, NO DIFFERENTIAL lines are required to transfer data on long distances
and at speeds in excess of 100MHz, which allows the full use of the SHB connector
60 pins.
Half Word Interface (16-bit SHB Interface)
The SHB connectors provide to the FPGA connections to the external world.
You can implement your own interface to transfer data over using these connectors,
but if you want to communicate with other Sundance modules, you can implement a
Half Word (Hw) interface sitting on 25 pins of an SHB connector.
Then, the SHBs are parallel communication links for synchronous transmission.
An SHB interface is derived from the SDB interface which is a 16-bit wide
synchronous communication interface. (
SUNDANCE SDB specification
)
The differences are:
The SHB interface can be made Byte (8 bits), Half Word (16 bits) or
Word (32 bits) wide.
The transfer rate can be increased thanks to better quality interconnect.
As an example, let us consider the Half Word (Hw) SHB interface.
You can implement 2 x 16-bit SHB interfaces per SHB connector, and have some
spare signals for User defined functions. (no differential lines are needed thanks to
our SHB cable assembly described in
The SMT407 provides two SHB connectors and can support data rates of 400MB/s
at 100MHz on each of these interfaces.
You must refer to the latest
SUNDANCE SDB specification
for technical information
on how it works.