Sensoray 526 - Manual (Page 5)

5
Introduction
Model 526 is a PC/104 multifunctional I/O board with the following features:
•
Four 24-bit programmable counters. Inputs could be driven from incremental encoders (in
1x, 2x, or 4x modes) or any digital signal. Inputs accept differential (RS-422) or standard
TTL/CMOS single-ended signals. The counters can also count internal clock (27 or 13.5 MHz).
•
Eight digital I/O channels configurable as inputs or outputs (in groups of 4) and capable of
generating interrupts.
•
4-channel 16-bit D/A converter (
±
10 V).
•
8-channel (multiplexed) differential 16-bit A/D converter (
±
10 V).
•
Programmable interrupt timer.
•
Watchdog timer with configurable timeout and output.
•
EEPROM for calibration data storage.
• Flexible address and interrupt line configuration.
•
Requires one power supply (+5V).
Model 526 is controlled through a set of 27 registers mapped into I/O space. The base address of
the board is selected with jumpers from a range of 0x0000 to 0xFFC0. The board is shipped with
the base address set to 0x2C0. All register accesses are 16 bit; 1 byte and odd address accesses
are not supported. The total I/O space claimed by the board is 0x40 (64) bytes.
Model 526 can generate interrupts on various programmable conditions. The interrupt line used
by the board is selected with jumpers from the following IRQ values: 3, 4, 5, 6, 7, 9, 10, 11, 12,
14 and 15. The board is shipped with the interrupt set to IRQ3.