Updated 31 October 2001
1) 2*20 pin connectors are not available.
2) Voltage converter from 3.3V to 5.4V will not be mounted
on pcb.
Front side of the Embedded Local Monitor Board
ELMB3
This is a 3.3V version with the processor ATMEGA103L 4AC March
2001 version
The ATmega103 runs at a 4 MHz clock speed. It has RISC architecture
with 121 mostly single
clock instructions. The main features of the LMB board are:
AVR RISC architecture ATMEL Atmega103
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128 kbytes of on-chip flash memory,
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4 kbytes of SRAM,
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4 kbytes of EEPROM,
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In-System Programming via CAN bus
Peripheral Features
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Full CAN controller interface with PCA82C250
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6 bit CAN identifier and 4 baud rates supported
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3-wire SPI interface
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Real Time Counter with a separate 32 kHz crystal
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Timers
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8-channel 10-bit ADC
I/O lines available1
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6 external interupt inputs
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Port A 8 digital bi-directional I/O lines (can alternatively
be used for external SRAM).
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Port C 8 digital output lines (can alternatively be used
for external SRAM).
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Port D 5 digital bi-directional I/O lines
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Port E 5 digital bi-directional I/O lines
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Port F 8 digital input lines or 8 analog inputs for the ADC
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Strobe and enable lines for external SRAM
1The use of the I/O-lines is subject
to the embedded software. Therefore for an optimum
performance please contact Henk Boterenbrood
Power regulators
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Separate regulator for the CAN bus transceiver and optocouplers
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Regulators for the microcontrollers and ADC
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Voltage converter 3.3V to 5.4V2)
Optional Delta-sigma ADC CRYSTAL CS5523
with 64 channel multiplexer
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6 bipolar or unipolar input ranges from 25mV to 4.5V
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100 pA input current on 25mV,55mV and 100mV
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10nA on 1V, 2.5V and 5V ranges
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8 conversion rates from 2 Hz to 100Hz
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64 channel multiplexer
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+5V and -5V on board power regulators
Mechanical dimensions