Spi Decoding (Option) - Rigol MSO4000 User Manual

8 Protocol Decoding

SPI Decoding (Option)

SPI serial bus consists of chip select line (SS), clock line (SCLK), MISO and MOSI.
SS
MISO
Host
MOSI
SCLK
Press Decode1  Decode to select "SPI" and open the SPI decoding function
menu.
1. Decoding mode
Press Mode to set the desired decoding mode.
CS: press SS to enter the chip select line setting interface. Press Channel

to select D0-D15 or CH1-CH4 as the chip select channel. When CH1-CH4 is
selected, press Threshold to set the threshold of the selected channel.
When D0-D15 is selected, the threshold does not need to be set. Press
Polarity to set the polarity of the chip select channel to
polarity) or
when this mode is selected.
TimeOut: press TimeOut to set the timeout time and the range available is

from 1 ns to 1 s. Note that at this point, the SS softkey is invalid (not
displayed).
2. SCLK Setting
Press SCLK to turn on the clock line setting interface.
Press Channel to select any channel (CH1-CH4 or D0-D15) as the clock

channel.
Press Slope to set the instrument to sample MISO and MOSI on the rising

edge or falling edge of SCLK.
Press Threshold to set the threshold of the clock channel.

MSO4000D/S4000 User's Guide
SS
MISO
Device
MOSI
SCLK
(negative polarity). Note that the SS softkey is only valid
SS
SCLK
MISO
MOSI
RIGOL
(positive
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