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This is also true of many of the "modern" programmable logic devices.  
It may well be something like this that they are talking about. The  
logic chip has an associated "configuration memory".

Jim Wagner

On Jan 8, 2008, at 4:41 PM, Tom Becker wrote:

> A followup:
>
> Today I received a datasheet from Philips that provides a little more
> information about the PLN-2020 Twin-eye laser motion sensor. In it is
> this:
> "In order to support a wide field of applications the PLN2022 twin-eye
> laser sensor is equipped with a 2k random access memory (RAM) that has
> to be programmed each time the sensor is powered up. As long as the
> power supply remains uninterrupted, the code is kept in memory.  
> Philips
> Laser Sensors will deliver this customer specific RAM code."
>
> This is new in my experience. The sensor and its necessary
> factory-supplied proprietary firmware have been separated and must be
> combined at each powerup by the host. Shades of drivers, but  
> peripheral
> microcode instead.
>
> Will our machines need to be Internet-connected soon so that our  
> sensors
> get the latest, licensed, firmware?
>
>

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>
>




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