APC483: PCI Counter/Timer with Quadrature Board

Several models with a variety of configurations provide up to ten counter/timer channels for counting events, generating waveform control signals, measuring pulse-widths, periodic rates, or quadrature position and monitoring operations.

Support for internal or external triggering simplifies the synchronization of operations to specific events. Counter functions can use internally generated clocks or an externally supplied clock.

Specifications

Counter/Timers

Counter/timer configuration:
APC482: Ten 16-bit counters – TTL
APC483: Four 16-bit counters – TTL, Four 32-bit counters – RS422
APC484: Six 32-bit counters – RS422
Other I/O mixes can be made available as specials.
Clock frequency: 20MHz.
Field I/O: Front panel SCSI-3 connector.
Speed (with 20MHz internal clock):
Maximum output pulse/square wave freq.: 200nS.
Minimum event pulse width: 100nS.
Minimum pulse width measurement: 100nS.
Minimum period measurement: 200nS.
Mode accuracy (with external clocking):
Waveform generation: Period is ±125nS.
Watchdog: Timeout occurs within ±1 clock cycle.
Pulse/period measurement: ±1 clock cycle.
Internal clocks: Programmable 1.25, 2.5, 5, 10 or 20MHz via the counter control register.
External clocks: Supported on a per-counter basis via clock line. Maximum frequency 8MHz.
Interrupts: Supported for watchdog timer time-out, event count complete, pulse width or periodic rate measurement complete, pulse wave complete (one-shot mode), successive waveform generation (continuous).
Triggering/gate: Programmable via register write or external trigger. Minimum pulse width 100nS. Line may be used for gating of counter.
Counter trigger: Interface for triggering counter functions. Input level is TTL or RS422 differential digital.
Counter input: Interface for events and pulse/period measurements. Also triggers load of watchdog timer register. Level is TTL or RS422 differential digital.
TTL compatibility: VIH = 2.0V and VIL = 0.8V. Inputs are buffered and include 4.7K ohm pull-ups to +5V.
Counter output: Level is TTL or RS422 differential digital.

Digital I/O

I/O channel configuration: 16 bi-directional TTL transceivers. Direction controlled as 16 independent channels.

PCI Bus Compliance

This device meets or exceeds all written PCI local bus specifications per rev. 2.2 dated December 1998.
System base address: This board operates in memory space. It consumes 4K of memory space.
Data transfer bus: Slave with 32, 16, and 8-bit data transfer operation.
Interrupts (INTA#): Interrupt A is used to request an interrupt.

Environmental

Operating temp.: 0 to 70°C or -40 to 85°C (E versions)
Storage temperature: -55 to 125°C.
Relative humidity: 5 to 95% non-condensing.
Power: 320mA at +5V, typical.
MTBF: Hours at 25°C, MIL-HDBK-217F, notice 2. APC482 1,744,259; APC483 1,727,707; APC484 1,708,729