27/09/2002
V560 User Manual
4
1. DESCRIPTION
1.1. FUNCTIONAL DESCRIPTION
The model V560 is a 1-unit wide VME module provided with 16 independent 32-bit counting channels
operating at the guaranteed input frequency of 100 MHz.
The channels are grouped in 8 section of two channels; for each section it is possible:
•
to enable/disable the channels interrupt generation;
•
to connect (via internal changeover switches) the two channels to obtain a single 64 bit
scale.
The module houses a VME RORA INTERRUPTER[1] that generates a VME interrupt (if enabled)
whenever the most significant bit of a scale becomes true
The module operation is fully controlled through VME. Some operations can be also performed by
three external NIM signals (indicated on the front panel connectors with "VETO", "CLEAR", "TEST"):
•
VETO: (INHIBIT) an input signal sent through this connector disables the counting.
•
CLEAR: (FAST CLEAR) an input signal present on this connector resets all the channels
(it is possible to perform the same operation by pressing the "MAN CLR" push-button
located on the front panel).
•
TEST: if the module is configured with 16 independent channels, a pulse sent through this
connector increases all the channels.
These inputs are high impedance and each one is provided with two bridge connectors for daisy
chaining.
The module V560 is an A24/A32 D16/D32 VME slave; its Base address is fixed by 6 internal rotary
switches. A front panel LED (DTACK) lights up each time the module generates the VME signal
DTACK.
The Model uses the P1 and P2 connector of VME and optionally the auxiliary connector for the
CERN V430[2] VMEbus crate (Jaux Dataway).
