Instrument Circuitry
57
Figure 6-7
Microprocessors in the Interface 5000
Notes for Figure 6-7:
• Note the lack of a ground connection between the USB bus and the Interface 5000 circuitry.
• The USB Processor firmware is loaded into its RAM upon power-up.
• The Power PC firmware is also transferred from ROM into RAM on power-up. Time-critical sections of
the Power PC code are kept in the processor’s fast-cache memory.
• The term UART refers to a Universal Asynchronous Receiver Transmitter. It converts parallel data to a
serial bit-stream. The UARTs send data at 6 Mbits/second.
• The Interface 5000 has local non-volatile data storage to save calibration data and board-revision
information. Interface 5000 calibration data is stored in the instrument, not in a data file. When an
Interface 5000 is moved from one computer to another, its calibration remains valid.
• The FPGA code can be updated in the field over the USB connection.
• The Instrument manager can be used for field update of all three programmable parts:
Communications, Instrument, and PLD firmware updates. Obtain binary code for the updates from the
Gamry website. If you need assistance with field updates, contact Gamry technical support at
techsupport@gamry.com, or contact your local Gamry representative.
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