XScopes
User’s Manual
DS-XScopes-3.5
– December, 2014
Page | 23
3.
Logic Analyzer and Protocol Sniffer
The XScope has an 8 bit logic analyzer and can do sniffing on standard protocols: I2C, UART and SPI. The logic inputs are
3.3V level, only the Portable devices are 5V tolerant. If you need to connect 5V signals to the logic analyzer, you could add
a 3K resistor in series with the signal, or use a 5V to 3.3V level converter chip. Figure 47 shows the logic menus.
Figure 47: Logic Analyzer Menus
3.1
Input Selection
A subset of the 8 digital signals can be selected. Any digital signal can be enabled or disabled.
3.2
Channel Position
The selected digital channels can be moved up or down. Only applicable if less than 8 digital signals are selected.
3.3
Invert Channel
All digital channels are inverted. This setting also affects the protocol sniffer!
3.4
Thick Logic ‘0’
A thick line is drawn when the signal is at logic ‘0’. This is useful to quickly differentiate a ‘0’ from a ‘1’.
Summary of Contents for XScopes
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