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STMPE24M31 bảng dữ liệu(PDF) 66 Page - STMicroelectronics

tên linh kiện STMPE24M31
Giải thích chi tiết về linh kiện  S-Touch® 16/24-channel touchkey controller with PWM and ratio engines
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
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Touchkey controller
STMPE16M31, STMPE24M31
66/85
Doc ID 16174 Rev 4
14
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.
Figure 19.
Data flow in touchkey controller
Table 16.
Touchkey controller registers
Address
Register name
Reset value
R/W
Description
0x90
KEY_FILT_CTRL
0x00
R/W
General key filter control
0x92
KEY_FILT_GROUP1
0x00000000
R/W
Define channels included in key
filter group 1
0x96
KEY_FILT_GROUP2
0x00000000
R/W
Define channels included in key
filter group 2
0x9A
KEY_FILT_DATA
0x00000000
R
Filtered touchkey data
0xB4
TOUCH_DET
0x00000000
R
Touch detection register
(real time)
Obsolete
Product(s)
- Obsolete
Product(s)



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