
Serial bus analysis
R&S
®
RTB2000
236
User Manual 1333.1611.02 ─ 11
Gray brackets = start and end of the frame
Violet
= address
Blue
= correct data words
Green
= acknowledge bit, ok
Table 12-2: Content of the I
2
C frame table
Column
Description
Start time
Time of the frame start in relation to the trigger point
Type
Value of the R/W bit, read or write access
ID
Hexadecimal value of the address
Length
Number of words in the frame
Data
Hexadecimal values of the data words
State
Overall state of the frame
Remote commands are described in
Chapter 15.11.3.3, "I²C - decode results"
12.3.5
I²C label list
Label lists are protocol-specific. Label lists for I
2
C are available in CSV and PTT for-
mat.
An I
2
C label file contains three values for each address:
●
Address type, 7-bit or 10-bit long
●
Address value
●
Symbolic label: name of the address, specifying its function in the bus network.
Example: I
2
C PTT file
# ----------------------------------------------------------------------------
@FILE_VERSION = 1.00
@PROTOCOL_NAME = i2c
# ---------------------------------------------------------------------------
# Labels for I2C protocol
# Column order: Identifier type, Identifier value, Label
# ---------------------------------------------------------------------------
7,0x1E,Voltage
7,38h,Pressure
7,2Ah,Temperature
7,16h,Speed
7,118,Acceleration
7,07h,HighSpeed_Master_0x3
7,51h,EEPROM
10,3A2h,DeviceSetup
10,1A3h,GatewayStatus
10,06Eh,LeftSensor
# ----------------------------------------------------------------------------
I²C (option R&S
RTB-K1)