4.Advanced User Guidebook
44
EventTable
ON
OFF
Select "ON" to display the event table.
Save
EventTable
If a USB storage device is currently connected to the
instrument, save the event table data
in a .csv
(spreadsheet) formatted file on the external USB storage
device.
3.
SPI Decoding
To decode SPI signal:
(1)
Connect the
clock line (SCLK) and the data line (SDA) of the SPI signal to the
Signal Input Channels of the oscilloscope.
(2)
Adjust to the proper time base and voltage division.
(3)
In trigger menu, select Bus trigger, and select bus type as SPI, set parameters
based on the characteristics of the signal, trigger the signal correctly and obtain
stable display. Refer to "
(4)
Push the
Decode
button on the front panel. Select bus type as SPI. set parameters
based on the characteristics of the signal. When the parameters are set correctly,
the information carried by the signal will be displayed.
Tip:
If there are repetitive menu items in both trigger menu and decoding menu, you
can set anyone of them, the other will be changed synchronously.
Note
:
Use the
Trigger Level
knob to adjust the thresholds of bus trigger and bus
decoding.
LS First
in Bit Order menu item (Least Significant Bit First) means that the least
significant bit will arrive first: hence e.g. the hexadecimal number 0x12, will
arrive as the sequence 01001000 in binary representation, will be decoded as the
reversed sequence 00010010.
SPI Decoding menu
list:
MENU
SETTING INSTRUCTION
Bus Type
SPI
Set bus type of decoding as SPI.
Configure
SCLK
Select the clock edge to match the signal,
sample the
SDA data on the rising or falling edge of the clock.
Time Out
Set the minimum time that the clock (SCL) signal must
be idle before the oscilloscope starts to search for the data
(SDA) on which to trigger. The range is 30 ns to 10 s.
Data Bits
Set the data width of each frame to match the signal. It
can be set to any integer between 4 and 32.
Bit Order
Select LS First or MS First to match the signal.
