SIOX sites and SIOX DCMs are available as SIOX rev.B and SIOX rev.C specifications. SIOX rev.C is the most recent superset over SIOX rev.B and includes optional parallel I/F. Connector types and DCM form-factors are different for SIOX rev.B and SIOX rev.C.
SIOX rev.B (also referenced as 'SIOX' without any revision specification) is used for all TORNADO-3x/54x/6x PC plug-in DSP Systems for ISA-bus host PC, TORNADO-P3x/P6x PC plug-in DSP Systems for PCI-bus host PC, and TORNADO-E stand-alone DSP Controllers.
SIOX rev.C is the latest design and features optional parallel data bus, smaller form-factor and different type of SIOX site connector. SIOX rev.C is used for TORNADO-P3x/P6x PC plug-in DSP Systems for PCI-bus host PC and latest revisions of TORNADO-E stand-alone DSP Controllers. SIOX rev.C allows installation of two SIOX rev.C DCMs onto TORNADO-P DSP System for PCI-bus PC, which features smaller height than that for regular TORNADO DSP Systems for ISA-bus PC.
The SIOX rev.C to SIOX rev.B converter/adapter board is available, which allows installation of two SIOX rev.B DCMs and their connection to source SIOX rev.C connectors.
SIOX rev.B I/F assumes serial communication between the on-board TMS320C3x/C54x/C6x DSP and SIOX rev.B DCM using the DSP on-chip SIO ports, and comprises of the following signals:
All SIOX rev.B signals are TTL/CMOS compatible (TORNADO-54x/6x/33/P3x/P6x/E33/E6x/E54x boards also provide 3v/5v logic levels compatibility). SIOX I/F allows communication at maximum CLKX/CLKR clock frequency for DSP on-chip SIO ports. This is maximum 15MHz for TMS320C31/C32 DSP, 37MHx for TMS320VC33 DSP, 50MHz for TMS320C54x DSP and 100MHz for TMS320C6x DSP.
SIOX rev.C I/F is a superset over SIOX rev.B I/F. It assumes serial and parallel data communication between the on-board TMS320C3x/C54x/C6x DSP and SIOX rev.C DCM using the DSP on-chip SIO ports and DSP parallel bus, and comprises of the following signals:
SIOX rev.C I/F is designed for compatible application specific AD/DA/IO coprocessor DCMs, which include on-board DSP with the HPI-port (typically C54x and C6x DSPs) for local signal processing.
All SIOX rev.B signals are 3v/5v logic compatible. SIOX rev.C I/F allows serial communication at maximum CLKX/CLKR clock frequency for DSP on-chip SIO ports. This is maximum 15MHz for TMS320C31/C32 DSP, 37MHx for TMS320VC33 DSP, 50MHz for TMS320C54x DSP and 100MHz for TMS320C6x DSP. Maximum communication speed over parallel bus for SIOX rev.C I/F is about 30 Mbyte/s.
Normally, SIOX DCM are designed to grab all resources of DSP on-chip SIO port, i.e. do not allow communication of other SIOX DCM(s) with the same DSP on-chip SIO port. This means that only one SIOX DCM should communicate with every DSP on-chip serial port. Such approach simplifies design of SIOX DCM and is also used when the sampling frequency per one AD/DA/IO channel is high enough.
However, when the sampling frequency per one AD/DA/IO channel is low enough, and many channels are required, the above approach will not deliver efficient usage of high-speed DSP on-chip SIO port and might result in requirement for multiple slow-speed SIO ports. This covers a wide range of applications, including industrial control, instrumentation, biomedical, etc. The solution is the SIOX-Bus architecture, which allows multiple SIOX-Bus DCMs to connect to one DSP on-chip SIO port.
SIOX-Bus architecture assumes individual addressing for every SIOX-Bus DCM and allows parallel connection of up to eight SIOX-Bus DCMs to one DSP on-chip SIO port. A variety of SIOX-Bus modules includes a selection of AD/DA/DIO DCMs. In order to extend the SIOX I/F site beyond the TORNADO mainboard, the SIOX Extenders are used.
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