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37
MISO Source:
Press the MISO source key to set any of CH1~CH4 as the data MISO input
of the SPI decoded signal.
CS Polarity:
Press PgDn CS polarity, to set the polarity of the chip select signal: positive
polarity or negative polarity.
Positive polarity: Valid when the chip select signal is positive.
Negative polarity: Valid when the chip select signal is negative.
SCLK Edge:
Press PgDn SCLK edge to set the clock signal edge: rising edge or
falling edge.
Rising edge: Triggers at the rising edge of the clock signal.
Falling edge: triggers at the falling edge of the clock signal.
MOSI Polarity:
Press PgDn MOSI polarity to set the MOSI polarity of the data signal:
positive polarity or negative polarity.
MISO Polarity:
Press PgDn MISO polarity to set the MISO polarity of the data signal:
positive polarity or negative polarity.
Bit Sequence:
Press PgDn bit sequence to set the data bits of the SPI protocol signal
are high bit in front (MSB) or low bit in front (LSB).
Bit Width:
Press PgDn bit width to set the bid width of each frame of the SPI protocol
signal, it can be 4 ~ 16.
Trigger Condition:
Press PgDn trigger condition to set the SPI trigger condition: Enable
chip select or idle time.
Enable chip select includes CS, CS & MOSI, CS & MISO, CS & Any. It triggers
on the edge where the chip select level jumps from invalid to valid.
Idle time includes Idle, Idle & MISO, Idle & MOSO, Idle & Any. The idle trigger
is triggered at the beginning of a new segment of data after a certain idle time.
Idle Time:
Press PgDn idle time and adjust the Multipurpose knob (shuttle knob or
numeric keypad) to set the idle time, the idle time counter counts when the
SCK is unchanged, and judges whether the count value exceeds the preset
value at the SCK valid edge, if exceeds, the oscilloscope will trigger at the
valid edge and clear the counter.
Frame Length:
Press PgDn frame length and adjust the Multipurpose knob to set the
length of the data frame.
Data:
Press PgDn data and adjust the Multipurpose knob to set the data, press
the knob to jump to the next digit to adjust.
Decode Bus:
Please refer to the RS232 Decode Bus.
Trigger Setting:
Please refer to the Trigger Setting in the “Edge Trigger” section for more
details.
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