Shb cable assembly, Shb inter modules solutions, Half word interface (16-bit shb interface) – Sundance SMT498 User Manual
Page 14: Table 1 - shb configuration matrix
D 2xTX,
1xRX
TX/RX
No
E 2xTX,
1xRX
TX/RX
TX/RX
Table 1 - SHB configuration Matrix
The demo logic will configure SHBA, SHBB, SHBE as receivers, while SHBC and
SHBD are transmitters. As SHBA is the only SHB that can support two 16-bit SDB
receivers, it will be configured for that implementation. The rest of the SHBs either
support 32-bit SDBs or 16-bit SDB transmitters. See Figure 4 for details.
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 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.
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 SHB Cable Assembly).
You must refer to the latest SUNDANCE SDB specification for technical information
on how it works.
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