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Digiquartz Data
Storage (DDS)
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Digiquartz Data
Storage (DDS) is an onboard serial EEPROM chip that contains
calibration and transducer information. This information can be
accessed electronically to provide plug and play pressure
transducer interchangeability.
Transducers with DDS can be identified by the presence of
additional wires to a standard transducer configuration. The sole
purpose of DDS is to store transducer configuration information.
Use of DDS is optional and does not affect pressure measurement
and accuracy. |
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Series 4000 Sensor with
DDS wires (side view) |
Series 4000 Sensor with
DDS wires (top view) |
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DDS wires have the following color codes.
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Wire Color |
Signal |
| White/brown |
Serial Clock
(SCL) |
| White/Violet |
Serial Data
(SDA) |
| Black |
Ground |
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The maximum recommended length of the SDA and SCL wires is 18
inches. Serial communication with the serial EEPROM may
become unreliable at longer wire lengths.
The information stored in DDS memory is organized as in the DDS
Memory Map below. An additional 4K bytes memory has been
allocated for customer application use.
Please review the
transducer
installation manual about programming details and power
requirements.
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Warning: Voltages
outside the range of -0.3 to 4.3 volts must not be applied
to the SDA and SCL signal lines.
Doing so will
damage the DDS serial EEPROM. |
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Digiquartz® Data Storage (DDS)
Memory Map |
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©2003
Paroscientific, Inc. |
