The ID supports up to 512 KB 8-bit SRAM, 512 KB 8-bit Flash, 1 MB 16-bit SRAM, and 1 MB 16-bit Flash. A 512-byte serial EEPROM, which does not require a battery backup, can be used as an additional memory device to store important data. An optional real-time clock (RTC) provides information on the year, month, date, hour, minute, second, 1/64 second. A lithium coin battery can be installed to back up both the SRAM and RTC.

Two asynchronous serial ports from the i386EX support reliable DMA-driven serial communication at up to 115,200 baud with RS-232 drivers. The i386EX also offers one synchronous serial port. An optional UART SCC2691 and a dual UART SCC2692 can be added for an additional three asynchronous serial ports with RS-232 or RS-485 drivers.

Three PC-compatible 16-bit programmable timers/counters can generate interrupts or count external events, at a rate of up to 8 MHz, or can generate pulse outputs. Three 8-bit, multifunctional, user-programmable I/O ports are included in the i386EX. Four external interrupts are buffered by Schmitt-trigger inverters and provide active low inputs. A supervisor chip (LTC691) with a watchdog timer is on-board.

Two PPI chips (82C55) provide 48 user-programmable I/O lines totally free for application use. The optional SCC2692 UART provides 15 additional I/O lines.

The ID supports several optional ADC and DACs. Up to 22 channels of 12-bit ADC (LTC2543, 0-5V, 10 KHz), one 16-bit ADC (LTC1605, 10V, 100 KHz), and one 24-bit ADC (LTC2400, 0-5V, 5 Hz) can be installed. Two 12-bit DACs (LTC1446, 0-4.095V, 10 KHz), one 100 KHz 12-bit DAC (LTC1450, 0-4.095V), and one 16-bit DAC (LTC1655, 0-4.095V, 10 KHz) are available.

Two quadrature decoders (HP2020) can interface to optical encoders for motion control. Schmitt-trigger inverters are provided. On-board expansion headers provide data lines, address lines, control signals, and pre-decoded chip select lines.

By default, a 5V switching regulator (up to 35V DC input) is installed to reduce power consumption and heat. The switching regulator introduces more noise than a linear regulator: a linear regulator can be installed upon request.

In “power-off” mode, the ID consumes very low (uA) power. Users can turn off the switching regulator via software, and use the RTC or an external signal to turn it on.

A MemCard can be installed on the ID to provide an additional 33 12-bit ADC, 6 24-bit ADC, 420 MB PCMCIA memory, and an Ethernet interface.

• Measures 4.7×4.5×0.6 inches
• 32-bit CPU (Intel i386EX), x86 compatible
• 33 MHz system clock
• Power consumption: 300/160/80/30 mA at 8.5/12/24/35V
• Temperature: -40 to +85 Celsius
• 24 Multiplexed I/Os, interrupts, DMA
• 48 bi-directional I/O lines from 2 PPIs
• Up to 3 MB total of SRAM/Flash
• Up to 5 async. serial ports, RS-232/485
• Up to 2 quadrature decoders
• Real-time clock, battery
• One 16-bit ADC, one 24-bit ADC
• 22 channels 12-bit ADC
• Two 12-bit DAC
• One 100 KHz DAC

• Includes i386EX 33 MHz with 128 KB SRAM
• 24 I/Os
• 2 RS-232
• 24×2 I/Os from PPIs
• watchdog
• 512-byte EE
• 5V regulator
• Does not include add-on options
• OEM option discounts available.

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