Protocol analysisMXO 4 Series
332User Manual 1335.5337.02 ─ 07
2. Select the tab of the bus that you want to set up, for example "SB1".
3. Tap the "Protocol type" button. Select the protocol: "SPI".
4. Tap on "State" to enable the decoding.
An SPI shortcut appears at the bottom left of the screen. Tap on the shortcut for a
quick access to the "SPI" dialog settings.
5. Tap on each active wire and select the correct channels: "SCLK", "MOSI", "MISO",
"CS".
6. Set "Bit order" to "MSB" or "LSB first".
7. Set "Clock polarity" to "Rising edge" (CPOL = 0) or "Falling edge" (CPOL = 1).
8. Set "MOSI polarity"/"MISO polarity" to "Active high"(CPHA = 0) or "Active
low"(CPHA = 1).
9. Set "CS polarity" to "Active high" or "Active low".
The typical value is "Active low", which means that the line is pulled low on mes-
sage start.
10. Set the "Word length". The typical value is 8.
11. Check that the signals are on the screen.
If not try adjusting the vertical and horizontal settings.
SPI bus (option R&S MXO4-K510)
To Next Page
Loading...
