Determine The Target - Infineon XMC7000 Quick Start Manual

XMC7000: Setting the Clock Supervision (CSV) parameters
Parameters related to CSV
Table 1 Clock specification parameters
Parameters
Reference clock frequency
Reference clock tolerance
Monitored clock frequency
Monitored clock tolerance
Monitored clock tolerance (modulation
depth)
Maximum startup time for monitored
clock
2.2

Determine the target

Check the minimum target with
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 value shown in the cell highlighted in
target should be greater or equal to the minimum target. If the target is smaller than the minimum target, the
'Value' cell of the target will be highlighted in red.
Application note
Value
8000000
1
50000000
3
0
35
Equation 1 using the CSV calculator.
200
Unit Remarks
Hz Nominal source clock frequency
ILO: 32768 (SID320)
IMO: 8000000 (SID310)
% ILO: SID320
IMO: SID310
Hz Nominal frequency, see
SID341/SID341A(4)/SID341B(4)/SID351
in the device datasheet
% ≥ 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)
μs ILO: 12 (SID321)
IMO: 7.5 (SID311)
PLL200: 35 (SID340)
PLL400: 50 (SID340A)
FLL: 5 (SID350)
WCO: 0 (Unused)
orange(Table
5
2) in the CSV calculator. The
002-34390 Rev. *A
2023-06-05