BK Precision 2560B Series, Руководство пользователя

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Serial Trigger and Decode
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10.1.3 I2C Serial Decode
Once the setup for the I2C signal and trigger has been completed, the decoding operation must be setup.
1. Touch Decode key to display the Decode menu.
2. Use the touchscreen to enable the Bus Operation .
3. Touch Bus option to select either Bus1 or Bus2 .
4. Touch Display option to select the character encoding format of the decoding’s result.
– The bus’s vertical position can be adjusted using the Universal Knob after selecting Bus Position .
5. Touch to return to the Decode menu.
6. Touch Display option and choose the bus option selected in step 3.
7. Touch Lines options and set the number of lines by Universal Knob or the virtual keypad.
– The range of the lines is 1 to 7.
8. Touch Scroll option and turn the Universal Knob to navigate the available lines.
Interpreting the I2C Decode
The frames of decoding result:
• The address value is displayed at the beginning of a frame. The write address is displayed in green, and the read
address is displayed in yellow.
• W/R bit is represented by (W) and (R), following the address value.
• The data value is displayed in white.
• "˜A " after a data or address bits indicates no acknowledgement. For example, DB˜A.
• A red dot indicates there is not enough space on the display to show the complete content of a frame.
Figure 10.9 I2C Decode Bus Display
The lists of decoding result:
• Time : The horizontal displacement between current frame and trigger position.
• Address : The address of a frame.
• R/W : The type of a frame (write or read).
• Data : The value of data.
Figure 10.10 Decode List Display