RM0091 Touch sensing controller (TSC)
Doc ID 018940 Rev 1 695/742
27.6.6 TSC I/O analog switch control register (TSC_IOASCR)
Address offset: 0x18
Reset value: 0x0000 0000
27.6.7 TSC I/O sampling control register (TSC_IOSCR)
Address offset: 0x20
Reset value: 0x0000 0000
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
Res. Res. Res. Res. Res. Res. Res. Res. G6_IO4 G6_IO3 G6_IO2 G6_IO1 G5_IO4 G5_IO3 G5_IO2 G5_IO1
rw rw rw rw rw rw rw rw
1514131211109876543210
G4_IO4 G4_IO3 G4_IO2 G4_IO1 G3_IO4 G3_IO3 G3_IO2 G3_IO1 G2_IO4 G2_IO3 G2_IO2 G2_IO1 G1_IO4 G1_IO3 G1_IO2 G1_IO1
rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw
Bits 31:24 Reserved, must be kept at reset value.
Bits 23:0 Gx_IOy: Gx_IOy analog switch enable
These bits are set and cleared by software to enable/disable the Gx_IOy analog switch.
0: Gx_IOy analog switch disabled (opened)
1: Gx_IOy analog switch enabled (closed)
Note: These bits control the I/O analog switch whatever the I/O control mode is (even if
controlled by standard GPIO registers).
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
Res. Res. Res. Res. Res. Res. Res. Res. G6_IO4 G6_IO3 G6_IO2 G6_IO1 G5_IO4 G5_IO3 G5_IO2 G5_IO1
rw rw rw rw rw rw rw rw
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
G4_IO4 G4_IO3 G4_IO2 G4_IO1 G3_IO4 G3_IO3 G3_IO2 G3_IO1 G2_IO4 G2_IO3 G2_IO2 G2_IO1 G1_IO4 G1_IO3 G1_IO2 G1_IO1
rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw
Bits 31:24 Reserved, must be kept at reset value.
Bits 23:0 Gx_IOy: Gx_IOy sampling mode
These bits are set and cleared by software to configure the Gx_IOy as a sampling capacitor
I/O. Only one I/O per analog I/O group must be defined as sampling capacitor.
0: Gx_IOy unused
1: Gx_IOy used as sampling capacitor
Note: These bits must not be modified when an acquisition is on-going.
During the acquisition phase and even if the TSC peripheral alternate function is not
enabled, as soon as the TSC_IOSCR bit is set, the corresponding GPIO analog switch
is automatically controlled by the touch sensing controller.
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