STMPE16M31PXQTR STMicroelectronics, STMPE16M31PXQTR Datasheet - Page 59

• Manufacturer Part Number: STMPE16M31PXQTR
• Description: IC CTLR TOUCHKEY 16CHAN 32-QFN
• Manufacturer: STMicroelectronics
• Series: S-Touch™r
• Type: Capacitive, PWM, Ratio Enginer

Specifications of STMPE16M31PXQTR

• Featured Product: STMPE16M31PX
• Number Of Inputs/keys: 16 Key, Slider
• Data Interface: I²C
• Data Rate/sampling Rate (sps, Bps): 100k, 400k
• Voltage Reference: External
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 32-VFQFN Exposed Pad
• Supply Voltage: 1.65 V to 1.95 V
• Number Of Channels: 16
• Dimensions: 4 mm L x 4 mm W x 0.8 mm H
• Temperature Range: - 40 C to + 85 C
• Termination Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Supply: -
• Resolution (bits): -
• Touch Panel Interface: -
• Other names: 497-10738-2

STMPE16M31PX
14
Touchkey and proximity sensing controller
The touchkey controller processes raw capacitance measurement data into “touch/no-
touch” boolean data for easy usage. The key filter unit 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.
The proximity sensor using a technique called ‘dithering’ to increase the sensitivity of one
selected channel. Dithering factor (configurable from 4 - 32x) determines the sensitivity of
proximity sensor.
Table 15.
0x9A - 0x9B
0x92 - 0x93
0xB4-0xB5
Address
0xB0
0xB1
0x90
0x96
0x97
0x98
Touchkey controller registers
KEY_FILT_GROUP1
KFU_PROX_CTRL
KEY_FILT_DATA
Register name
PROX_DATA_0
PROX_DATA_1
TOUCH_DET
PROX_CFG
PEVR
PTVR
Doc ID 17058 Rev 2
Reset value
0x0000
0x0000
0x0000
0x00
0x00
0x00
0x00
0x00
0x00
Touchkey and proximity sensing controller
R/W
R/W
R/W
R/W
R/W
R/W
R
R
R
R
Key filter and proximity sensor
control
Define channels included in key
filter group 1
Proximity configuration register
Proximity variance register (PTVR)
Proximity enviromental variance
register
Proximity data port 0
Proximity data port 1
Filtered touchkey data
Touch detection register
(real time)
Description
59/75