Infineon Traveo II User manual

User Guide Please read the Important Notice and Warnings at the end of this document 002-32474 Rev.*A
www.infineon.com page 1 of 8 2021-04-22
Setting CSV Parameters
Traveo™ II Family
About this document
Scope and purpose
The Clock Supervision (CSV) feature in Traveo II family enables you to check the frequency of the monitored
clock to ensure that it is within the allowed frequency window. To understand the functionality described and
terminology used in this guide, see the “Clocking System”chapter in the Architecture Technical Reference
Manual (TRM).
This guide describes how to calculate and set the CSV parameters using the CSV Calculator.
Intended audience
This document is intended for anyone using the Traveo II family to determine the CSV parameters.
Table of contents
About this document......................................................................................................................... 1
Table of contents .............................................................................................................................. 1
1Overview ................................................................................................................................. 2
2Parameters related to CSV ........................................................................................................ 3
2.1 Check the clock specifications................................................................................................................3
2.2 Determine the target...............................................................................................................................3
2.3 Calculate the lower and upper limit .......................................................................................................4
2.4 Calculate the period................................................................................................................................4
2.5 Calculate the startup delay.....................................................................................................................4
2.6 Check the values for CSV register settings .............................................................................................5
3CSV calculator example............................................................................................................. 6
Revision history................................................................................................................................ 7

User Guide 2 of 8 002-32474 Rev.*A
2021-04-22
Setting CSV Parameters
Traveo™ II Family
Overview
1Overview
Figure 1 shows the signal example of the CSV.
Monitored Clock
ReferenceClock
Period
Upper Limit
Lower Limit
Monitor Event
Lower Limit
Upper Limit
the allowed frequency window
Target
Figure 1 CSV operation signal example
The basic operation principle of the CSV circuit is as follows:
•Period is the monitored clock count while ‘Target’is the reference clock count. In an ideal case, these two
are the same.
•The monitored clock generates a Monitor event (Period), and the reference clock generates Lower and
Upper limits.
•The Monitor event is compared against the Lower and Upper limits.
•An error is reported if the Monitor event ≤Lower limit, or Monitor event > Upper limit.

User Guide 3 of 8 002-32474 Rev.*A
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Setting CSV Parameters
Traveo™ II Family
Parameters related to CSV
2Parameters related to CSV
Check the parameters related to CSV by the following steps.
2.1 Check the clock specifications
Check the following clock specifications:
•Reference clock frequency and tolerance (integer %)
•Monitored clock frequency and required tolerance (interger %)
The required monitored clock tolerance should be equal to or larger than the reference clock tolerance.
•Maximum startup time for the monitored clock except for WCO.
In the case of WCO, the startup time is unused (0). CSV should be enabled after WCO is started
(BACKUP_STATUS.WCO_OK = 1).
Enter the above values in the cells, highlighted in orange, of the CSV Calculator. If the Monitored clock
tolerance is smaller than Reference clock tolerance, the ‘Value’cell of Monitored clock tolerance will be
highlighted in red.
Table 1 Clock specification parameters
Parameters
Value
Unit
Remarks
Reference clock frequency
8000000
Hz
ILO: 32768 (SID320)
IMO: 8000000 (SID310)
Reference clock tolerance
1
%
Monitored clock frequency
50000000
Hz
Monitored clock tolerance
1
%
≥Reference clock torelance
Maximum startup time for monitored clock
35
μs
ILO: 12 (SID321)
IMO: 7.5 (SID311)
PLL200: 35 (SID340)
PLL400: 50 (SID340A)
WCO: 0 (Unused)
2.2 Determine the target
Check the minimum Target with Equation 1 using the CSV Calculator.
For example, for a tolerance of one percent, the Target must be at least 200. Increasing the Target increases the
CSV accuracy; it also increases the latency.
Equation 1
  

Determine and enter the Target highlighted in orange of the CSV Calculator referring the calculated minimum
Target. The Target should be equal to or greater than the minimum Target. If the Target is smaller than the
Minimum Target, the ‘Value’cell of the Target will be highlighted in red.

User Guide 4 of 8 002-32474 Rev.*A
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Setting CSV Parameters
Traveo™ II Family
Parameters related to CSV
Table 2 Target parameters
Parameters
Value
Unit
Remarks
Minimum Target (Calculated reference clock count)
200
Cycles
Target (Reference clock count for user definition)
200
Cycles
≥Minimum Target
2.3 Calculate the lower and upper limit
Calculate the Lower limit with Equation 2 using the CSV Calculator.
Equation 2
    
 
󰇡
 󰇢
Calculate the Upper limit with Equation 3 using the CSV Calculator.
Equation 3
    
 
󰇡
 󰇢
2.4 Calculate the period
Calculate the Period with Equation 4 using the CSV Calculator. If the Period value is less than one, increase the
Target value. To avoid the round off error of the Period value, the value should be as close to an integral value
as possible and not a decimal value. This can be achieved by adjusting Target value.
Equation 4
  

2.5 Calculate the startup delay
Calculate the Startup Delay with Equation 5 using the CSV Calculator. In the case of WCO, the startup time is
unused (0). CSV should be enabled after WCO is started (BACKUP_STATUS.WCO_OK = 1).
Equation 5
    󰇛

 󰇜

User Guide 5 of 8 002-32474 Rev.*A
2021-04-22
Setting CSV Parameters
Traveo™ II Family
Parameters related to CSV
2.6 Check the values for CSV register settings
You should set the values obtained by subtracting 1 from the above calculated values in the CSV register. The
CSV Calculator calculates these CSV register values based on the above parameters and automatically displays
the values in cells highlighted in green. If the Value is larger than 65535, the cell will be highlighted in red.
When determining the final CSV parameters, evaluate the CSV function sufficiently in the user system
environment.
Table 3 Parameters for CSV registers
Parameters
Value
Unit
Remarks
Upper limit value for UPPER register
204
Cycles
Maximum: 255 (Only for CSV_ILO/LF/BAK)
Maximum: 65535 (Others)
Lower limit value for LOWER register
195
Cycles
Maximum: 255 (Only for CSV_ILO/LF/BAK)
Maximum: 65535 (Others)
Period value for PERIOD register
1249
Cycles
Minimum: 0
Maximum: 255 (Only for CSV_ILO/LF/BAK)
Maximum: 65535 (Others)
Startup delay value for STARTUP register
282
Cycles
Maximum: 255 (Only for CSV_ILO/LF in
Traveo II Body)
Maximum: 511 (Only for CSV_ILO/LF/BAK in
Traveo II Cluster)
Maximum: 65535 (Others)

User Guide 6 of 8 002-32474 Rev.*A
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Setting CSV Parameters
Traveo™ II Family
CSV calculator example
3CSV calculator example
This section shows the CSV Calculator example with the following parameters:
•Reference clock frequency: 8 MHz (IMO)
•Reference clock (IMO) tolerance: 1 % (IMO)
•Target: 200 (use the same value as the calculated minimum Target)
•Monitored clock frequency: 50 MHz (CSV_HF0/PLL200)
•Monitored clock tolerance: 1 % (CSV_HF0/PLL200)
•Startup time for Monitored clock: 35 (PLL200)
Enter the above parameters in the cells, highlighted in orange, of the CSV Calculator.
Table 4 Input parameters
Parameters
Value
Unit
Remarks
Reference clock frequency
8000000
Hz
ILO: 32768 (SID320)
IMO: 8000000 (SID310)
Reference clock tolerance
1
%
Minimum Target (Calculated reference clock count)
200
Cycles
Target (Reference clock count for user definition)
200
Cycles
≥Minimum Target
Monitored clock frequency
50000000
Hz
Monitored clock tolerance
1
%
≥Reference clock torelance
Maximum startup time for monitored clock
35
μs
ILO: 12 (SID321)
IMO: 7.5 (SID311)
PLL200: 35 (SID340)
PLL400: 50 (SID340A)
WCO: 0 (Unused)
The CSV Calculator calculates the CSV register values based on the entered parameters and automatically
displays the values in cells highlighted in green.
Table 5 Output parameters
Parameters
Value
Unit
Remarks
Upper limit value for UPPER register
204
Cycles
Maximum: 255 (Only for CSV_ILO/LF/BAK)
Maximum: 65535 (Others)
Lower limit value for LOWER register
195
Cycles
Maximum: 255 (Only for CSV_ILO/LF/BAK)
Maximum: 65535 (Others)
Period value for PERIOD register
1249
Cycles
Minimum: 0
Maximum: 255 (Only for CSV_ILO/LF/BAK)
Maximum: 65535 (Others)
Startup delay value for STARTUP register
282
Cycles
Maximum: 255 (Only for CSV_ILO/LF in
Traveo II Body)
Maximum: 511 (Only for CSV_ILO/LF/BAK
in Traveo II Cluster)
Maximum: 65535 (Others)

User Guide 7 of 8 002-32474 Rev.*A
2021-04-22
Setting CSV Parameters
Traveo™ II Family
Revision history
Revision history
Revision
Issue date
Description of change
**
2021-02-10
Initial release
*A
2021-04-22
Updated the description in 2.4 and the remarks in Table 3 and Table 5.

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Edition 2021-04-22
Published by
Infineon Technologies AG
81726 Munich, Germany
© 2021 Infineon Technologies AG.
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Document reference
002-32474 Rev.*A
IMPORTANT NOTICE
The information given in this document shall in no
event be regarded as a guarantee of conditions or
characteristics (“Beschaffenheitsgarantie”) .
With respect to any examples, hints or any typical
values stated herein and/or any information
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Technologies hereby disclaims any and all
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intended for technically trained staff. It is the
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respect to such application.
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