stmpe16m31 STMicroelectronics, stmpe16m31 Datasheet - Page 66
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stmpe16m31
Manufacturer Part Number
stmpe16m31
Description
S-touch? 16/24-channel Touchkey Controller With Pwm And Ratio Engines
Manufacturer
STMicroelectronics
Datasheet
1.STMPE16M31.pdf
(85 pages)
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Touchkey controller
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Touchkey controller
The touchkey controller processes raw capacitance measurement data into “touch/no-
touch” boolean data for easy usage. The 2 key filter units provides additional flexibility by
allowing the system to define a maximum number of keys that could be detected and
considered active, based on the amount of impedance change detected.
Table 16.
Figure 19. Data flow in touchkey controller
Address
0x9A
0xB4
0x90
0x92
0x96
Touchkey controller registers
KEY_FILT_GROUP1
KEY_FILT_GROUP2
KEY_FILT_CTRL
KEY_FILT_DATA
Register name
TOUCH_DET
Doc ID 16174 Rev 3
Reset value
0x00000000
0x00000000
0x00000000
0x00000000
0x00
R/W
R/W
R/W
R/W
R
R
General key filter control
Define channels included in key
filter group 1
Define channels included in key
filter group 2
Filtered touchkey data
Touch detection register
(real time)
STMPE16M31, STMPE24M31
Description
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