VMIVME-2540 24-Channel Intelligent Counter/Controller

• Event counting - up to 4 giga events 

• Frequency measurement —1.16 x 10-3 Hz to 2.5 MHz 

• Period/pulse-width measurement—400 ns to 8.5899 x 106 s (32-bit floating point), 400 ns to 858 s (32-bit unsigned integer) 

• Square wave/pulse train generation - 0.0076 Hz to 2.5 MHz 

• Timer/periodic VMEbus interrupter - 0.0076 to 1,000 Hz 

• Quadrature position measurement - sin/cos up to 1 MHz, 32-bit counters, limit/modulo checking 

• Integer period/pulse-width measurement 16- and 32-bit, discrete or continuous; low data transport lags 

• Programmed output - up to 24 discrete outputs 

• Pulse sequence mode - train of N pulses with programmable duty cycle 

• Quadrature position control outputs - ±1/4 wave control resolution; up to 1.25 MHz step rate and ±32767 steps per command 

• Integer QPM group acquisition - captures two integer QPM measurements simultaneously 

• Event-triggered timer delay - generates VMEbus interrupt up to 131.1 seconds after event edge input; retriggerable 

• 24 control/measurement interfaces: 24 clocks, 24 gates, 24 outputs 

• RS-422 differential interface with support for single-ended TTL inputs 

• Options allow configurations of 4, 8, 16, and 24 interfaces 

• On-board 15 MHz 68HC000 CPU 

• A32/A24/D32/D16/D8 (EO) VME slave interface, 64 Kbyte VMEbus memory window 

• Data exchange interface: ANSI/IEEE standard 754-1985 for 32-bit floating-point arithmetic 

• Continuous measurement modes