User manual

Protocol Analysis
R&S
®
Scope Rider RTH
127User Manual 1326.1578.02 ─ 04
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Slave Select or Chip Select line (SS or CS)
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Master data output, slave data input (MOSI or SDI)
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Master data input, slave data output (MISO or SDO)
When the master generates a clock and selects a slave device, data may be transfer-
red in either or both directions simultaneously.
Figure 7-4: Simple configuration of SPI bus
The data bits of a message are grouped by following criteria:
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A word contains a number of successive bits. The word length is defined in the pro-
tocol configuration.
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A frame contains a number of successive words, at least one word.
For SPI buses, the R&S RTH provides the following trigger possibilities:
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On frame start
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On frame end
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On a serial pattern at a specified position
7.3.2 SPI Configuration Settings
Access: "Bus" menu > "Bus Protocol" = "SPI" > "Config"
SPI (Option R&S RTH-K1)