YOKOGAWA DL1640 User manual

User’s
Manual
Yokogawa Electric Corporation
DL1640/DL1640L
Digital Oscilloscope
I2C-Bus Signal Analysis Function
(Includes the SPI Bus Signal Analysis Function)
IM 701610-61E
2nd Edition

i
IM 701610-61E
Foreword
Thank you for purchasing the Digital Oscilloscope DL1640/DL1640L/F5 with the I2C-bus
signal analysis function and the SPI bus signal analysis function.
This User’s Manual describes the I2C-bus signal analysis function and SPI bus signal
analysis function. For information about other functions, operating procedures, and
handling precautions of the DL1740, see the following manuals:
Manual Name Manual No. Description
DL1620/DL1640/DL1640L IM 701610-01E Describes all functions (except for the
User’s Manual communications function) and their
operation procedures for the instrument.
DL1620/DL1640/DL1640L IM 701610-17E Describes the communications functions of
Communication the GP-IB, RS-232, USB, and network
Interface User’s Manual interface.
DL1620/DL1640/DL1640L IM 701610-02E Explains basic operations only.
Operation Guide
Notes
•The contents of this manual are subject to change without prior notice as a result of
improvements in the instrument’s performance and functions. Display contents
illustrated in this manual may differ slightly from what actually appears on your screen.
•Every effort has been made in the preparation of this manual to ensure the accuracy
of its contents. However, should you have any questions or find any errors, please
contact your nearest YOKOGAWA representative listed on the back cover of this
manual.
•Copying or reproduction of all or any part of the contents of this manual without
YOKOGAWA’s permission is strictly prohibited.
•Aguarantee card is attached to the instrument. The card will not be reissued, so
please read it carefully and keep it in a safe place.
Trademarks
•Adobe and Acrobat are either trademarks or registered trademarks of Adobe Systems
incorporated.
•For purposes of this manual, the TM and ® symbols do not accompany their
respective trademark names or registered trademark names.
•Other product names are trademarks or registered trademarks of their respective
holders.
Revisions
1st Edition: July 2003
2nd Edition: July 2005
2nd Edition : Julyr 2005 (YK)
All Rights Reserved, Copyright © 2003 Yokogawa Electric Corporation

ii IM 701610-61E
How to Use this Manual
Structure of the Manual
This user’s manual consists of 3 chapters, and an Index as described below.
Chapter Title Content
1I
2C-Bus Signal Analysis Function Explains I2C-bus signal analysis function.
2SPI-Bus Signal Analysis Function Explains SPI bus signal analysis function.
3Specifications Lists the I2C-bus signal analysis function and SPI
bus signal analysis function specifications.
Index Index of contents.
Conventions Used in this Manual
Units
k....... Denotes 1000. Example: 100 kS/s
K...... Denotes 1024.
Example: 720 KB (storage capacity of a floppy disk)
Bolded Items
Characters written in bold mainly refer to characters or setting values that are displayed
on the screen or panel.
Symbols
The following symbols are used in to this manual.
Affixed to the instrument. Indicates danger to personnel or
instrument and the operator must refer to the user’s manual.
The symbol is used in the user’s manual to indicate the
reference.
WARNING Calls attention to actions or conditions that could cause
serious or fatal injury to the user, and precautions that can
be taken to prevent such occurrences.
CAUTION Calls attentions to actions or conditions that could cause
light injury to the user or damage to the instrument or user’s
data, and precautions that can be taken to prevent such
occurrences.
Note
Provides information that is important for proper operation of
the instrument.
Terms Used for Descriptions of Operations
The following terms are used in chapters 1 and 2 to distinguish certain features in
descriptions.
Relevant Keys
Indicates the relevant panel keys which are necessary to
carry out the operation.
Procedure
Carry out steps in the order shown. The operating
procedures are given with the assumption that you are not
familiar with the operation. Thus, it may not be necessary to
carry out all the steps when changing settings.
Explanation
Describes settings and restrictions relating to the operation.

iii
IM 701610-61E
Contents
Foreword ......................................................................................................................................... i
How to Use this Manual ..................................................................................................................ii
Chapter 1 I2C-Bus Signal Analysis Function
1.1 Overview of the I2C-Bus Signal Analysis Function ........................................................... 1-1
1.2 Connecting the Probe ...................................................................................................... 1-2
1.3 Setting the Trigger Conditions .......................................................................................... 1-3
1.4 Trigger Setting Examples ............................................................................................... 1-13
1.5 Analyzing/Searching Data .............................................................................................. 1-18
1.6 Saving the Detailed Analysis Results ............................................................................. 1-25
1.7 Communication Commands ........................................................................................... 1-28
1.8 Error Messages .............................................................................................................. 1-39
Chapter 2 SPI Bus Signal Analysis Function
2.1 Overview of the SPI Bus Signal Analysis Function .......................................................... 2-1
2.2 Connecting the Probe ...................................................................................................... 2-2
2.3 Displaying the Signals to Be Analyzed ............................................................................. 2-3
2.4 Analyzing/Searching Data ................................................................................................ 2-6
2.5 Saving the Detailed Analysis Results ............................................................................. 2-16
2.6 Communication Commands ........................................................................................... 2-19
2.7 Error Messages .............................................................................................................. 2-27
Chapter 3 Specifications
3.1 I2C-Bus Signal Analysis Function ..................................................................................... 3-1
3.2 SPI Bus Signal Analysis Function .................................................................................... 3-2
Index
1
2
3
Index

1-1
IM 701610-61E
1
I
2
C-Bus Signal Analysis Function
1.1 Overview of the I2C-Bus Signal Analysis Function
About the I2C-Bus Signal Analysis Function
By using this function, you will be able to analyze data while displaying the I2C-bus signal
waveform. The main functions are as follows:
•Trigger Function
Captures signals using various trigger conditions such as when a start condition is
detected, when an Acknowledge bit is not detected, when the specified address (7
bits + R/W) pattern is met, or when the data pattern is met or not met (start trigger,
Non-Ack trigger, or address trigger).
Triggers can also be activated by combining the I2C trigger condition (SCL/SDA
signal) and the CH3/CH4 signal (combination trigger).
•Analysis Function
You can analyze the data and other information that are displayed when the
acquisition of historical data, acquisition data, or waveform is stopped.
The analysis results are listed on the right side of the screen. In addition, the analysis
results can be displayed using hexadecimal and binary notation. The analysis results
and waveforms can be displayed simultaneously.
•Search Function
From the acquired data (the currently displayed data), you can search in the forward
or reverse direction for data that matches a specified address pattern, data pattern, or
Acknowledge bit condition, and display the matched data expanded on the ZOOM
display. You can specify the address pattern or data pattern using binary or
hexadecimal values. You can also search indefinite data.
Chapter 1 I2C-Bus Signal Analysis Function

1-2 IM 701610-61E
1.2 Connecting the Probe
Input Terminals
Connect the probe to one of the input terminals located at the lower section of the front
panel. The input impedance is 1 MΩ±1.0% and approximately 28 pF.
CH 1CH 2CH 3CH 4
1MΩ28pF 300V CAT
WARNING
To prevent fire or electric shock, do not use this instrument for category
II, III, or IV measurements.
CAUTION
The maximum input voltage for 1 MΩinput is 300 VDC or 300 Vrms
when the frequency is 1 kHz or less. Applying a voltage exceeding this
maximum can damage the input section. If the frequency is above 1
kHz, the input section may be damaged even when the voltage is below
this value.
Precautions to Be Taken When Connecting a Probe
• When using the I2C-bus trigger function, apply the SCL (serial clock) signal and SDA
(serial data) signal to the CH1 and CH2 input terminals, respectively.
• When connecting a probe to the instrument for the first time, perform phase correction
of the probe as described in section 3.5, “Compensating the Probe (Phase
Correction)” in the DL1620/DL1640/DL1640L User’s Manual IM 701610-01E . Failure
to do so may result in unstable gain across different frequencies, thereby preventing
correct measurement. Calibration must be performed for each channel.
•Note that if the object being measured is directly connected to the instrument without
using a probe, correct measurements may not be possible due to loading effects.
Note
The data analysis function and the data search function of the I2C bus can be used against
the CH3 and CH4 signals. For details, see section 1.5, “Analyzing/Searching Data.”

1-3
IM 701610-61E
1
I
2
C-Bus Signal Analysis Function
1.3 Setting the Trigger Conditions
Relevant Keys
ACTION DELAY
X -Y MENU MENU PHASE
SEARCH
HORIZONTAL
VERTICAL TRIGGER
TRIG D
HELP
ESC
SELECTRESET
SIMPLE
MODE POSITION
MATH
MISCFILE
CLEAR
TRACE
HISTORY
MEASURE
SETUP
PRESET
DISPLAY
CURSOR
CH 1
CH 2
CH 3
CH 4
POWER
COPY IMAGE SAVE SHIFT
ZOOM
GO/NO-GO
ENHANCED
ACQ START/STOP
SNAP
SHOT
V DIV TIME DIV
Procedure
1. Press ENHANCED.
2. Press the Type soft key. The trigger type selection menu appears.
3. Press the I2C Bus soft key.
Selecting the I2C Trigger Type
4. Press the I2C Type soft key and then the START, Non-ACK, or ADRS soft key.
• When START Is Selected
If you selected the START trigger, proceed to step21.
•When Non-ACK Is Selected
If you selected the Non-ACK trigger, proceed to step 21.

1-4 IM 701610-61E
•When ADRS Is Selected
5. Press the Adrs&Data soft key. The I2C Adrs&Data Setup dialog box appears.
Setting the Address Pattern
6. Turn the jog shuttle to select Address Pattern.
7. Press SELECT. The button to the left of Address Pattern is highlighted, and the
address pattern becomes the trigger target.
8. Turn the jog shuttle to move the cursor to the item you wish to set the pattern.
9. Press SELECT to display the entry box.
Entry box
10. Turn the jog shuttle to set the value. Bits set to “X” will not be used as a trigger
condition. The trigger conditions can be specified using binary (BIN) or
hexadecimal (HEX) values.
Press SELECT or ESC to close the entry box. The value will be confirmed.
1.3 Setting the Trigger Conditions

1-5
IM 701610-61E
1
I
2
C-Bus Signal Analysis Function
Note
When using binary (BIN) display, set the LSB using “R” (Read), “W” (Write), and “X.”
Setting the Data Pattern
11. Turn the jog shuttle to select Data Pattern.
12. Set the value in a similar fashion as described in steps 7 through 10.
13. Turn the jog shuttle to move the cursor to Condition of Data Pattern.
14. Press SELECT to select True or False.
15. Turn the jog shuttle to move the cursor to Position of Data Pattern.
16. Press SELECT to select First Byte or Anywhere.
Setting Whether to Ignore Restart Conditions
17. Turn the jog shuttle to move the cursor to Ignore the Restart Condition.
18. Press SELECT to select YES or NO.
Setting Whether to Ignore Start/Stop Conditions That Do Not Conform to the
Protocol
19. Turn the jog shuttle to move the cursor to Ignore Unexpected Start/Stop
Condition.
20. Press SELECT to select Yes or No.
Press ESC to close the dialog box.
•Setting the Trigger Level, Hysteresis, Trigger Coupling, and HF Rejection
21. Press the Level/Coupling soft key. The Level/Coupling dialog box appears.
Setting the Trigger Level
22. Turn the jog shuttle to move the cursor to the desired channel for setting the
trigger level (Level).
23. Press SELECT to display the level setup menu.
24. Turn the jog shuttle to set the value.
You can move between the digits using the arrow keys. Pressing RESET resets
the trigger level to 0.00 V.
25. Press SELECT to confirm the value.
Setting the Hysteresis
26. Turn the jog shuttle to move the cursor to the desired channel for setting the
hysteresis (Hys).
27. Press SELECT to select or .
1.3 Setting the Trigger Conditions

1-6 IM 701610-61E
Setting the Trigger Coupling
28. Turn the jog shuttle to move the cursor to the desired channel for setting the
coupling.
29. Press SELECT to select DC or AC.
Setting the HF Rejection
30. Turn the jog shuttle to move the cursor to the desired channel for setting the HF
rejection (HF Rej).
31. Press SELECT to select ON, or OFF.
Press ESC to close the dialog box.
•Selecting the Combination Trigger
32. Press the Combination soft key and then press the I2C Only, I2C on Pattern,
or I2C →→
→→
→Pattern soft key.
•When I2C Only Is Selected
33. Press the Set Pattern soft key. The Set Pattern dialog box appears. If you
selected I2C Only, you do not have to set this item.
Press ESC to close the box.
• When I2C on Pattern Is Selected
33. Press the Set Pattern soft key. The Set Pattern dialog box appears.
Setting the CH3 and CH4 Pattern
34. Turn the jog shuttle to move the cursor to Pattern CH3 or CH4.
35. Press SELECT to select H, L, or X.
Setting the Trigger Condition
36. Turn the jog shuttle to move the cursor to Condition.
37. Press SELECT to select True or False.
Press ESC to close the dialog box.
1.3 Setting the Trigger Conditions