Reset And Clocks; Table 95. Acquisition Sequence Summary; Figure 286. Sampling Capacitor Voltage Variation - STMicroelectronics STM32F05 series Reference Manual

Touch sensing controller (TSC)
Table 95.
State
#1
#2
#3
#4
#5
#6
#7
The voltage variation over the time on the sampling capacitor C

Figure 286. Sampling capacitor voltage variation

27.3.3

Reset and clocks

The TSC clock source is the AHB clock (f
generate the pulse generator and the spread spectrum internal clocks:
● The pulse generator clock (f
TSC_CR register
●
The spread spectrum clock (f
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, please refer to the Reset
and clock control (RCC) section.
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Acquisition sequence summary
G1_IO1 G1_IO2
(electrode) (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
V
CS
V
DD
Threshold =V
IH
Burst duration
Doc ID 018940 Rev 1
G1_IO3
(electrode)
Input floating with analog switch
closed
Input floating
Input floating
Input floating
Input floating
Input floating
Input floating
). Two programmable prescalers are used to
HCLK
) is defined using the PGPSC[2:0] bits of the
PGCLK
) is defined using the SSPSC bit of the TSC_CR
SSCLK
G1_IO4
State description
(electrode)
Discharge all C
Dead time
Charge C
Dead time
Charge transfer from
C
X1
Dead time
Measure C
is detailed below:
S
t
RM0091
and
X
C
S
X1
to C
S
voltage
S