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Letter of Volatility for the CompactDAQ 9172

Hardware: CompactDAQ>>Backplanes>>cDAQ-9172

Problem:
I need official confirmation that sensitive data passing through National Instruments CompactDAQ-9172 chassis will be erased when the device loses power.

Solution:
Here is a list of the current information on our cDAQ-9172. The list below contains the types of memory in each device, the amount, and whether or not the information stored in that memory is retained. Volatile memory loses its contents when the device is powered off, while nonvolatile memory retains its contents when the device is powered off.


Storage Type Size Volatility Access Restrictions
Microcontroller Integrated Flash 128k x 16-bit or 256k x 16-bit Nonvolatile Hardware controlled. Not user-accessible.
Microcontroller Integrated SRAM 8k x 32-bit Volatile Hardware controlled. Not user-accessible.
Analog Input FIFO 2k x 32-bit Volatile Hardware controlled. Not user-accessible.
Analog Output FIFO 8k x 16-bit Volatile User has write access via API.
Digital Input FIFO 2k x 32-bit Volatile Hardware controlled. Not user-accessible.
Digital Output FIFO 2k x 32-bit Volatile User has write access via API.
SPI Serial Flash 8Mbit Nonvolatile The device configuration area is not accessible from any API. The section that stores calibration constants and digital power-up states does have portions that are user-accessible.
CPU Endpoint FIFO 8k x 8-bit Volatile User has write access via API.
DMA Endpoint FIFO 4k x 8-bit Volatile User has write access via API.
Cartridge Controller Instruction Memory 8 x 1k x 18-bit Volatile Hardware controlled. Not user-accessible.
Cartridge Controller Data Memory 8 x 512 x 32-bit Volatile User has write access via API.


Related Links:
KnowledgeBase 3WBH6BE1: Letter of Volatility for M-Series DAQ Devices
KnowledgeBase 3CPA3SHS: Letter of Volatility for E-Series DAQ Devices
KnowledgeBase 41O95AE1: Letter of Volatility for S Series DAQ Devices

Attachments:





Report Date: 03/19/2008
Last Updated: 04/21/2008
Document ID: 4JICAI9K

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