Table of Contents
Advertisement
XMC7000: Setting the Clock Supervision (CSV) parameters
CSV calculator examples
3
CSV calculator examples
3.1
PLL200
An example of the PLL200 CSV calculator is demonstrated in this section with the following parameters:
Reference clock frequency: 8 MHz (ECO)
•
Reference clock tolerance: 1 % (ECO)
•
Target: 200 (use the same value as the calculated minimum target)
•
Monitored clock frequency: 50 MHz (CSV_HF0/PLL200)
•
Monitored clock tolerance: 3 % (CSV_HF0/PLL200)
•
Monitored clock tolerance (modulation depth): 0% (CSV_HF0/PLL200)
•
Startup time for Monitored clock: 35 ���� (PLL200)
•
In the CSV calculator, enter the values given in cells highlighted in orange in
Table 4
Input parameters
Parameters
Reference clock frequency
Reference clock tolerance
Minimum target (calculated reference clock count)
Target (reference clock count for user definition)
Monitored clock frequency
Monitored clock tolerance
Monitored clock tolerance (modulation depth)
Maximum startup time for monitored clock
Application note
Table
Value
Unit
8000000
Hz
1
%
200
Cycles
200
Cycles
50000000
Hz
%
3
0
%
35
μs
8
4.
Remarks
Nominal source clock
frequency
ILO: 32768 (SID320)
IMO: 8000000 (SID310)
ILO: SID320
IMO: SID310
≥ Minimum target
Nominal frequency
≥ Reference clock tolerance
(SID310/SID320)
Minimum: 3 (when the
monitored clock is
PLL200/400 without
SSCG/fractional mode)
Minimum: 5 (when the
monitored clock is PLL400
with SSCG/fractional mode)
Maximum: 3 (only for PLL400
with SSCG mode)
0 (others)
ILO: 12 (SID321)
IMO: 7.5 (SID311)
PLL200: 35 (SID340)
PLL400: 50 (SID340A)
FLL: 5 (SID350)
WCO: 0 (unused)
002-34390 Rev. *A
2023-06-05
Advertisement
Table of Contents
