ADVANCED VEHICLE TECHNOLOGIES, Inc.
AVT-921 Hardware Revision Descriptions
Updated: 18 January, 2001
Revision A
General release; 21 August, 1996
A 1 K ohm load resistor, R47, added to output of isolated 12v DC-DC converter.
Revision B
General release; 12 May, 1998
Added 100,000 pF noise bypass capacitors to the power supply leads of the opto-isolators.
Revision C
General released; 19 May, 1998
Changed the Sharp opto-isolators to Toshiba units. The Toshiba units have longer propogation delay times. This required a change in the firmware to reduce the SPI clock speed to 1.25 MHz (versus the original 2.5 MHz SPI clock).
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