Protocol analysis
R&S
®
RTO6
509User Manual 1801.6687.02 ─ 05
No ACK setup: Addr/W/R NACK
The no ACK setup consists of the Addr/W/R NACK.
The no ACK setup settings are the same as in the I2C trigger setup, see "No Ack con-
ditions
"
on page 502.
Remote command:
SEARch:TRIGger:I2C:DRNack on page 1700
SEARch:TRIGger:I2C:DWNack on page 1701
SEARch:TRIGger:I2C:NACKnowledge on page 1694
13.2.5.2 I²C search results
To get search results, "Enable" the search. You can minimize, shift or close the search
dialog.
The search results are listed in the search result table and marked in the waveform by
blue lines.
For an introduction to search results, see:
●
Chapter 11.1.2, "Search results", on page 420
●
Chapter 11.4.2, "Display zoom settings", on page 440
The remote commands for the search reults are described in Chapter 24.17.3.5, "I²C
search results", on page 1701.
13.3 SPI bus (option R&S RTO6-K510)
● The SPI protocol................................................................................................... 509
● SPI configuration...................................................................................................510
● SPI trigger............................................................................................................. 515
● SPI decode results................................................................................................517
● Search on decoded SPI data................................................................................ 518
13.3.1 The SPI protocol
A 4-channel instrument is required for full support of the SPI protocol, or the MSO
option R&S RT
O6-B1.
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
SPI bus (option R&S RT
O6-K510)
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