Table 227. Sampling Rate And Filter Length Vs Fltfxf[3:0] And Clock Setting; Table 228. Fault Input Blanking Events - ST STM32G4 Series Reference Manual

High-resolution timer (HRTIM)

Table 227. Sampling rate and filter length vs FLTFxF[3:0] and clock setting

-
FLTFxF[3:0]
0001,0010,0011 f
0100, 0101 f
HRTIM
0110, 0111 f
HRTIM
1000, 1001 f
HRTIM
1010, 1011, 1100 f
HRTIM
1101, 1110, 1111 f
HRTIM
Fault blanking and event counting
The fault inputs can be temporary disabled to blank spurious fault events. The blanking
sources are listed in the
- FLTxBLKS = 0, reset-aligned window
Fault input Blanking window start Blanking window end Blanking window start Blanking window end
hrtim_flt1[4:1] Timer A reset/roll-over
hrtim_flt2[4:1] Timer B reset/roll-over
hrtim_flt3[4:1] Timer C reset/roll-over
hrtim_flt4[4:1] Timer D reset/roll-over
hrtim_flt5[4:1] Timer E reset/roll-over
hrtim_flt6[4:1] Timer F reset/roll-over
A fault counter also allows to discard multiple spurious fault events and define an
acceptance criteria.
The FLTxCNT[3:0] bitfield selects the FAULTx counter threshold. A fault is considered valid
when the number of events is equal to the FLTxCNT[3:0] value.
This FLTxRSTM selects the FAULTx counter reset mode
•
0: fault counter hardware reset on reset / roll-over event, as per the
•
1: fault counter reset on each reset / roll-over event only if no event occurs during last
counting period, as shown on
The fault counter can be reset by software with the FLTxCRES bit at anytime.
886/2083
f vs FLTSD[1:0]
FLTS
00 01
f
HRTIM HRTIM
/2 f /4
HRTIM
/4 f /8
HRTIM
/8 f /16
HRTIM
/16 f /32
HRTIM
/32 f /64
HRTIM
Table 228

Table 228. Fault input blanking events

Timer A CMP3 event
Timer B CMP3 event
Timer C CMP3 event
Timer D CMP3 event
Timer E CMP3 event
Timer F CMP3 event
10 11
f f
HRTIM HRTIM
f /8 f /16
HRTIM HRTIM
f /16 f /32
HRTIM HRTIM
f /32 f /64
HRTIM HRTIM
f /64 f /128
HRTIM HRTIM
f /128 f /256
HRTIM HRTIM
below.
Timer A CMP4 event
Timer B CMP4 event
Timer C CMP4 event
Timer D CMP4 event
Timer E CMP4 event
Timer F CMP4 event
Figure 243 below.
RM0440 Rev 1
Filter length for f
HRTIM
Min
f , N =2
HRTIM
11.8 ns
f /2, N = 6 f
HRTIM HRTIM
70.6 ns
f /4, N = 6 f
HRTIM HRTIM
141 ns
f /8, N = 6 f
HRTIM HRTIM
282 ns
f /16, N = 5 f
HRTIM HRTIM
471 ns
f /32, N = 5 f
HRTIM HRTIM
941 ns
FLTxBLKS = 1 moving window
Timer A CMP3 event
Timer B CMP3 event
Timer C CMP3 event
Timer D CMP3 event
Timer E CMP3 event
Timer F CMP3 event
Table 229
RM0440
= 170 MHz
Max
f , N =8
HRTIM
47.1 ns
/16, N = 8
753 ns
/32, N = 8
1.51 µs
/64, N = 8
3.01 µs
/128, N = 8
6.02 µs
/256, N = 8
12.05 µs
below.