V6M6 Woodward McCoach 6U VME Carrier Board

The Communication Automation Corporation / Woodward McCoach V6M6 6U VME Carrier Board can hold up to six plug-in modules. The V6M6 and its modules together occupy a single VME slot.

A variety of module types are available to perform general purpose processing, digital signal processing, and I/O interface functions. Any mix of module types may be installed on the V6M6, subject to certain physical limitations such as I/O connector accessibility.

The six module sites on the V6M6 are interconnected by two buses. The first is a PCI bus, electrically compatible with the standard PCI bus used in PC applications. The second bus is a proprietary Time Division Multiplexed (TDM) bus typically used to carry isochronous (constant bit rate) data such as digitized audio.

In addition, the "S" option of the V6M6 (i.e. V6M6/S) includes an interface between the TDM bus and the standard VITA 6-1994 SCSA bus on the VME P2 connector.

The host (VME) interface provides PIO ports to access the module sites and global memory. Each PIO port is implemented as a set of three registers: a Control / Status Register, an Address Register, and a Data Register. Access to these registers is controlled via the Unix device interface by a special device driver. A library of C-callable functions, the V6M6 Host Application Library, is provided for application programmers to access and utilize the interface for data transfer and module control operations.