ST STM32L4+ Series Reference Manual page 1048

Touch sensing controller (TSC)
State
#1
#2
#3
#4
#5
#6
#7
The voltage variation over the time on the sampling capacitor C
Threshold =V
31.3.3 Reset and clocks
The TSC clock source is the AHB clock (HCLK). Two programmable prescalers are used to
generate the pulse generator and the spread spectrum internal clocks:
•
The pulse generator clock (PGCLK) is defined using the PGPSC[2:0] bits of the
TSC_CR register
•
The spread spectrum clock (SSCLK) is defined using the SSPSC bit of the TSC_CR
register
The Reset and Clock Controller (RCC) provides dedicated bits to enable the touch sensing
controller clock and to reset this peripheral. For more information, refer to
and clock control
1048/2301
Table 211. Acquisition sequence summary
G1_IO1 G1_IO2
(channel) (sampling)
Output open-
Input floating
drain low with
with analog
analog switch
switch closed
closed
Output push-
pull high
Input floating with analog switch
closed
Figure 243. Sampling capacitor voltage variation
V
CS
V
DD
IH
Burst duration
(RCC).
G1_IO3
(channel)
Input floating with analog switch
closed
Input floating
Input floating
Input floating
Input floating
Input floating
Input floating
RM0432 Rev 6
G1_IO4
State description
(channel)
Discharge all C
C
Dead time
Charge C
Dead time
Charge transfer from
C
X1
Dead time
Measure C
is detailed below:
S
t
Section 6: Reset
RM0432
and
X
S
X1
to C
S
voltage
S
MS30931V1