DPO6000
，
MPO6000 Series Digital Phosphor Oscilloscope Instruction V1.1
- 48 -
6.5.15.SPI Trigger(optional)
SPI is the short of Serial Peripheral Interface.It is a synchronous serial interface
technology launched by Motorola corporation, is a high-speed, full duplex, synchronous
communication bus.
In SPI trigger, when a timeout condition is met, the oscilloscope will trigger when the
specified data is found. When using SPI trigger, SCL clock sources and SDA data sources
need to be specified.SPI bus timing diagram is as follows:
Press
【
Trig Menu
】
on the frontal panel to turn on trigger function menu.
【
Type
】
select SPI and press V0 to confirm.
【
Clock source
】
select
CH1~CH4
or
LA
to be trigger source.
Note
:when use LA to be trigger source, LA must be inserted.
【
Slope
】
select the desired trigger edge(rising edge
、
falling edge
、
double edge),press V0
to confirm.
【
Data source
】
select
CH1~CH4
or
LA
to be trigger source.
Note
:when use LA to be trigger source, LA must be inserted.
【
Overtime
】
The timeout must be greater than the period of the CLK clock source.
【
Data bits width
】
set up the data bits width.
【
Data bit
】
set up the data bit.
【
Mode
】
select acquisition mode(auto
、
normal),press V0 to confirm.
【
Holdoff
】
set the holdoff time.
【
Decoding
】
switch decoding function.
【
Label location
】
the position of the decoding data drawn on the screen(only useful when
decoding function is turned on)
【
Table
】
data recording mode.
Trigger level knob
:he analog channel can modify the trigger level value.Trigger symbol
moves up and down according to the rotation of the knob.
Digital channel
:can change trigger threshold of the digital channel by setting the threshold
voltage.
Trigger setting:
Clock source:CH3;Slope:rising;Data source:CH4;Timeout:366ns;Data bit width:8;Data
bits:7bits.Adjust the trigger level, and the trigger result is shown as follows:
