STMPE811_09 Datasheet, PDF (35/64 Pages) STMicroelectronics – Advanced resistive touch screen controller with 8-bit GPIO expander

STMPE811
Touch screen controller
TSC_CTRL
7
6
5
4
TSC_STA
TRACK
Touch screen controller control register
3
2
1
0
OP_MOD
EN
Address:
0x40
Type:
R/W
Reset:
0x90
Description:
4-wire touch screen controller (TSC) setup.
[7] TSC_STA: TSC status
Reads '1' when touch is detected
Reads '0' when touch is not detected
Writing to this register has no effect
[6:4] TRACK: Tracking index
000: No window tracking
001: 4
010: 8
011: 16
100: 32
101: 64
110: 92
111: 127
[3:1] OP_MOD: TSC operating mode
000: X, Y, Z acquisition
001: X, Y only
010: X only
011: Y only
100: Z only
This field cannot be written on, when EN = 1
[0] EN: Enable TSC
Doc ID 14489 Rev 2
35/64