Fll Example - Infineon XMC7000 Quick Start Manual

XMC7000: Setting the Clock Supervision (CSV) parameters
CSV calculator examples
Parameters
Monitored clock tolerance (modulation depth)
Maximum startup time for monitored clock
The CSV calculator calculates the CSV register values based on the entered parameters and automatically
displays the values shown in the column highlighted in green in
Table 7 Output parameters
Parameters
Upper limit value for UPPER register
Lower limit value for LOWER register
Period value for PERIOD register
Startup delay value for STARTUP
register
3.3

FLL example

An example of the FLL CSV calculator is demonstrated in this section with the following parameters:
Reference clock frequency: 8 MHz (IMO)
•
Reference clock tolerance: 4 % (IMO)
•
Target: 50 (use the same value as the calculated minimum target)
•
Monitored clock frequency: 100 MHz (CSV_HF0/FLL)
•
Monitored clock tolerance: 5 % (Reference clock tolerance + SID352)
•
Monitored clock tolerance (modulation depth): 0 % (CSV_HF0/FLL)
•
Startup time for Monitored clock: 5 ���� (FLL)
•
In the CSV calculator, enter the values given in cells highlighted in orange in Table 8
Application note
Value
3
50
Table
Value Unit Remarks
439 Cycles Maximum: 255 (only for CSV_ILO/LF/BAK)
Maximum: 65535 (others)
377 Cycles Maximum: 255 (only for CSV_ILO/LF/BAK)
Maximum: 65535 (Others)
10000 Cycles Minimum: 0
Maximum: 255 (only for CSV_ILO/LF/BAK)
Maximum: 65535 (Others)
404 Cycles Maximum: 255 (only for CSV_ILO/LF)
Maximum: 65535 (others)
10
Unit Remarks
PLL200/400 without
SSCG/fractional mode)
Minimum: 5 (when the
monitored clock is PLL400
with SSCG/fractional mode)
% Maximum: 3 (only for PLL400
SSCG mode)
0 (others)
μs ILO: 12 (SID321)
IMO: 7.5 (SID311)
PLL200: 35 (SID340)
PLL400: 50 (SID340A)
FLL: 5 (SID350)
WCO: 0 (unused)
7.
002-34390 Rev. *A
2023-06-05