Keysight N5745A - Instrument Memory

8
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: Summary of instrument memory for the DC Power Supply.
Memory Type
and Size
Is Memory user
accessible as a mass
storage device?
Writable During Normal
Operation?
Data Retained When
Powered Off?
Purpose/Contents
Data Input
Method
Location in
Instrument and
Remarks
Sanitization
Procedure
System Flash
(NAND Flash)
42 MB
No
Yes
Yes
Contains the
operating system
and instrument
firwmare
Factory
Install /
Firmware
Upgrade
CPU board
No method, not
user accessible,
and contains no
application-
specific
information.
User Flash
(NAND Flash)
(Keysight Flash)
79 MB
Yes Yes Yes saved instrument
states and
calibration
User-saved
data
CPU board (same
chip as firmware
memory, but
managed separately.
See Table 2
NAND Flash
(Keysight
Flash2)
1 MB
No
Yes
Yes
Not Used
Factory or
Service Only
CPU board (same
chip as firmware
memory, but
managed separately
No method, not
user accessible,
and contains no
application-
specific
information.
Flash
6 Mb
No
Yes
Yes
Bootloader
components that
load the operating
firmware from the
NAND flash memory
Factory
Install
CPU board (same
chip as firmware
memory, but
managed separately
No method, not
user accessible,
and contains no
application-
specific
information.
FPGA
14.6 K cells
No Yes No GPIB control data
and registers
Factory
Install
CPU board Power cycle
Flash
4 Mb
No No Yes FPGA configuration
code
Factory
Install
CPU board No method, not
user accessible
PROM
M25P40 FLASH
Memory
2 Kb
No Yes Yes FPGA program code.
No user stored data.
Factory
Service Only
CPU board No method, not
user accessible
Main processor
(ROM)
32 kB
No No Yes
Main processor
execution code
Manufacturer
programmed
CPU board
No method, not
user accessible,
and contains no
application-
specific
information.