Agilent Technologies DSO-X 4022A, User Manual

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I2C/SPI Triggering and Serial Decode
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Agilent InfiniiVision 4000 X-Series Oscilloscopes User's Guide 429
2 In the Trigger Menu, press the Trigger softkey; then, turn the Entry knob
to select the serial slot (Serial 1 or Serial 2) on which the SPI signals
are being decoded.
3
Press the
Trigger Setup
softkey to open the SPI Trigger Setup Menu.
4 Press the Trigger softkey; then, turn the Entry knob to select the trigger
condition:
•
Master-Out, Slave-In (MOSI) Data
— for triggering on the MOSI data
signal.
• Master-In, Slave-Out (MISO) Data — for triggering on the MISO data
signal.
5
Press the
#Bits
softkey, and turn the Entry knob to set the number of
bits ( #Bits ) in the serial data string.
The number of bits in the string can be set anywhere from 4 bits to 64
bits. The data values for the serial string are displayed in the
MOSI/MISO Data string in the waveform area.
6 For each bit in the MOSI/MISO Data string:
a Press the Bit softkey; then, turn the Entry knob to select the bit
location.
As you rotate the Entry knob, the bit is highlighted in the Data
string shown in the waveform area.
b Press the 0 1 X softkey to set the bit selected in the Bit softkey to 0
(low),
1
(high), or
X
(don't care).