User manual

Protocol Analysis
R&S
®
Scope Rider RTH
126User Manual 1326.1578.02 ─ 04
Data Relation
Sets how the defined serial data pattern is compared with the acquired signal. The
instrument triggers if the acquired data pattern is equal or unequal the defined pattern.
Byte Offset
Sets the number of bytes before the first byte of the data pattern. These bytes are
ignored.
7.3 SPI (Option R&S RTH-K1)
7.3.1 The SPI Protocol
A 4-channel instrument is required for full support of the SPI protocol.
The Serial Peripheral Interface SPI is used for communication with slow peripheral
devices, in particular, for transmission of data streams.
Main characteristics of SPI are:
●
Master-slave communication
●
No device addressing; The slave is accessed by a chip select, or slave select line.
●
No acknowledgement mechanism to confirm receipt of data
●
Duplex capability
Most SPI buses have four lines, two data and two control lines:
●
Clock line to all slaves (SCLK)
SPI (Option R&S RTH-K1)