Instrument Memory
This section contains information on the types of memory available in your instrument. It explains the size of
memory, how it is used, its location, volatility, and the sanitization procedure.
Table 1-1: Summary of instrument memory
Memory type
and size
Writable during
normal
operation?
Data retained
when
powered off?
Purpose/contents Data input
method
Location in
instrument and
remarks
Sanitization
procedure
Processor DDR3
SDRAM
256 MByte
Yes No Contains working copies of
operating system,
instrument software and
measurement data. It also
offers a RAM backed file
system.
Operating sys-
tem
Mainframe Power cycle
Parallel NAND
Flash Memory
256 MByte
Yes Yes Contains Microsoft Windows
CE Embedded Operating
System, instument firmware,
crash recovery image,
connectivity data,
FPGA configuration image
and user instrument states. It
also serves as the boot flash.
Programmed
before
installed, by
firmware oper-
ations, and by
user input
Mainframe Refer
Table 1-2
I2C EEPROM
4 kByte
No Yes Contains board revision,
MAC address and serial
number.
By factory
install
Mainframe Not available
Battery-backed
SRAM
128 kByte
Yes Yes Used to save instrument
readings and instrument
state.
By user input Mainframe Refer
Table 1-3
Processor FPGA
(SRAM)
2200 kbit
Yes No Used for data processing. By FPGA oper-
ations
Mainframe Power cycle
Module Pro-
cessor (FRAM)
15.5 kByte
Yes Yes Used to store processor
execution code, calibration
constants, relay counts, user
label, relay states and state
information.
By factory
install, by firm-
ware upgrade,
by firmware
operations, and
by user input
Module Refer
Table 1-4
Power Processor
(FRAM)
8.5 kByte
No Yes Used to store processor
execution code.
By factory
install and by
firmware
upgrade
Mainframe Not available
Keyboard Pro-
cessor (FRAM)
8.5 kByte
No Yes Used to store processor
execution code.
By factory
install and by
firmware
upgrade
Mainframe Not available
Keysight DAQ970A Security Guide 9
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