CAEN
Electronic Instrumentation
UM5175
–
V2495/VX2495 User Manual rev. 1
8
1
Introduction
The V2495 is a general-purpose programmable FPGA and I/O unit
housed in a 1-unit wide VME 6U module. The board is a suitable
solution for the implementation of digital functions such as
Coincidence, Trigger Logic, Gate and Delay Generator,
Input/Output Register and more.
The programmable architecture is based on the User FPGA
(hereafter UFPGA). The UFPGA is directly interfaced to the front
panel I/Os and to an onboard Gate and Delay Generator, that
allows to delay and gate up to 32 signals. A second FPGA, the
Main FPGA (hereafter MFPGA), is responsible for USB and VME
interface management. The MFPGA communicates with the
UFPGA through an internal local bus.
The presence of three expansion slots interfaced to the UFPGA
allows to extend the channel interface of the V2495 by adding up
to three independent mezzanine boards. Five mezzanine board
types are available: A395A, A395B, A395C, A395D, A395E (see
). The V2495 can reach a maximum of 194 I/O channels.
The board can be controlled and programmed through either the
VME or the USB interface. The CAENUpgrader software tool is
provided to upload the FPGA firmware. An onboard dedicated
JTAG connector allows for in-system JTAG configuration and
debugging (e.g. using Altera SignalTap).
The V2495 can be considered as an evolution of CAEN V1495
board with which it bears several analogies (e.g. the front panel
connectors have the same function and nomenclature with
respect to the V1495). In addition, it provides enhanced logic
resources, features and interfaces.
is a comparison table between the two
modules.
V1495
V2495
User FPGA
Altera Cyclone EPI1C20, 20k LEs
Altera Cyclone V GX, 50k LEs
Front Panel I/O
Sections A and B (2 x 68-pin Robinson Nugent connector; 32 input channel each)
Section C (1 x 68-pin Robinson Nugent connector; 32 output channels)
Section G (2 X LEMO connector; input/output channels)
On-board Delay
Generator
4 Delay lines
32 Gate and Delay lines
Local Bus
16-bit 50 MHz parallel interface
VME Bus
Addressing spaces: A24, A32
Data transfer modes: D16, D32, BLT32
Geographical addressing (VX2495)
USB Interface
Not Supported
USB2.0
Mezzanine
Boards
A395A, A395B, A395C, A395D, A395E
Tab. 1.1:
Comparison table between V1495 and V2495
