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36
Baud Rate:
Press PgDn baud rate to set the rate of the CAN protocol signal that
needs to be decoded, you can select 10kb/s, 20kb/s, 33.3kb/s, 50kb/s,
62.5kb/s, 83.3kb/s, 100kb/s, 125kb/s, 1Mb/s or user-defined.
In user-defined, customize the baud rate by adjusting the Multipurpose knob
or shuttle knob.
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.
6.5 SPI Decode (Optional)
SPI interface is a kind of synchronous serial peripheral interface, which can
make the host and all kinds of peripheral equipment undertake communication
through the serial methods. It is a kind of synchronous communication bus
of full duplex. It usually uses four signal lines: MOSI: the host data output,
the slave data input; MISO: the host data input, the slave data output;
SCLK: clock signal generated by the host; CS: the slave chip selection enable
signal.
SPI interface is mainly used for synchronous serial data transmission between
the host and low speed peripheral devices. Under the shift pulse of the host,
the data is transmitted in bytes, that is to say, higher byte first and then lower
byte. Since the SPI interface does not need to look for the slave address
and is full duplex communication, the protocol itself is relatively simple and
therefore is widely used. SPI protocol transmission is shown in the following
picture:
Note: At least 3 output channels are required. Therefore, this function is only
available on the 4-channel product of UPO3000E series oscilloscopes.
SPI Selection:
Press DECODE type, and select SPI by the Multipurpose knob. You can
also switch the trigger type by consecutively pressing the type key, then
press the Multipurpose knob to confirm.
CS Source:
Press the CS source key to set any of CH1~CH4 as the chip select input of
the SPI decoded signal.
SCLK Source:
Press the SCLK source key to set any of CH1~CH4 as the clock input of the
SPI decoded signal.
MOSI Source:
Press the MOSI source key to set any of CH1~CH4 as the data MOSI input
of the SPI decoded signal.
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