VME - PMC - CADDY - Carrier Board for PMC Modules
The PMC - CADDY is a VME64 - based board carrying up to two PMC single insertable modules or one double size insertable module with a VMEbus connection through the VME - PCI bridge UNIVERSE CA91C142 by Tundra using an internal clock rate of 33 MHz.
The CA91C142 board is designed to operate as either a slave or master on the VMEbus. If the board operates as master, it supports a 4-level arbiter. The PMC - CADDY operates with a data width of up to 32 bits and with 32 address signals on the VMEbus. The VMEbus interrupt can be applied to any of the seven interrupt-request lines. The board is connected to the VMEbus by two 160-pin VG-connectors according to IEC603-xx on VME64 extensions. An active VMEbus-interrupt request is shown by a red LED on the front panel and a VMEbus access to the board is shown by a yellow LED.
Both PMC plug-in units are designed according to the draft standard IEEE P1386/Draft 2.0 (except the standard I/O pin routing) making it possible to insert all PMC modules currently on the market. In addition to the connectors for the PMC address/ data and control signals, every plug-in unit of the PMC - CADDY has an I/O-connector which applies the I/O signals of the PMC modules to VMEbus connector P2. Two different P2 pin assignments are available: In the standard configuration, each P2-pin is only connected to one I/O-pin of the PMC modules (acc. to PMC-Update of FORCETM, Table 1, Author: Wayne Fischer, Director of Strategic Programs CMC/PMC Working Groups Chair, 22.10.96). In the option.-32P, the pin assignment is acc. to IEEE P1386/Draft 2.0, Table 6-3. This pin assignment offers the connection of the two PMC modules via P2, because several PMC-I/O-signals are shorted at P2.
The front panel of the PMC - CADDY has two holes for the front panels of the PMC modules. A blank cover for free plug-in units is included in the price. For a fee, esd electronics, Inc. provides libraries for the initialization of the board in C-Source-Code for VxWorks and OS-9 (MSDOS format), and drivers for other operating systems are available upon request. Please state your operating system with the version number when you order.