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SDS1000X-E User Manual
87
WWW.SIGLENT.COM
I2C Trigger and Serial Decode
Please in order of “
Setup for I2C Signals
”, “
I2C Trigger
” and “
I2C Serial Decode
” to
trigger and decode the signals.
Setup for I2C Signals
Setting the I2C (Inter-IC bus) signal includes two steps: connecting the serial data signal
(SDA) and serial clock signal (SCK) to oscilloscope, specifying the threshold voltage of
each input signal.
1. Press the
Decode
key to enter the
DECODE
function menu as Figure 34 shows.
Figure 39 I2C DECODE Menu
2. Press the
Decode
softkey and select the desired slot (Decode1 or Decode2).
3. Press the
Protocol
softkey and then select
I2C
by turning Universal Knob.
4. Press the
Signal
softkey to enter the
SIGNAL
menu as Figure 35 shows.
Figure 40 I2C SIGNALLE Menu
5. Set SCL (I2C’s clock signal):
a. Press the
SCL
softkey to select the channel that is connected to the I2C clock
signal.
b. Press the first
Threshold
softkey to set the I2C clock signal’s threshold voltage
level by
Universal Knob
. The threshold voltage level is for decoding, and it will be
regard as the trigger voltage level when set the trigger type to serial.
6. Set SDA (I2C’s data signal):
a. Press the
SDA
to select the channel that is connected to the I2C data signal.
b. Press the second
Threshold
softkey to set the I2C data signal’s threshold voltage
level by
Universal Knob
. The threshold voltage level is for decoding, and it will be
regard as the trigger voltage level when set the trigger type to serial.
(Tips: SDA should keep stable during the whole high clock cycle, otherwise it will be
interpreted as a start or stop condition (data transitioning while the clock is high))
7. Press the
softkey to return previous menu.
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