STMPE24M31QTR STMicroelectronics, STMPE24M31QTR Datasheet - Page 47

• Manufacturer Part Number: STMPE24M31QTR
• Description: IC SENSOR S-TOUCH 24CH 40QFN
• Manufacturer: STMicroelectronics
• Series: S-Touch™r
• Type: Capacitiver

Specifications of STMPE24M31QTR

• Number Of Inputs/keys: 24 Key
• Data Interface: I²C
• Data Rate/sampling Rate (sps, Bps): 100k, 400k
• Voltage Reference: External
• Voltage - Supply: 1.65 V ~ 1.95 V
• Current - Supply: 900µA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 40-VQFN
• Output Type: Logic
• Interface: I²C
• Input Type: Logic
• Supply Voltage: 1.8 V
• Number Of Channels: 24
• Dimensions: 5 mm L x 5 mm W x 0.85 mm H
• Temperature Range: - 40 C to + 85 C
• Termination Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-10380-2

STMPE16M31, STMPE24M31
13
Touch sensor controller
The STMPE16M31 and STMPE24M31 devices use the STMicroelectronics’ patent pending
capacitive front end. The capacitive sensor is configure by the following registers:
Table 13.
0xC0-0xEF
Address
0x7C
0x70
0x71
0x72
0x76
0x77
0x78
Touch sensor controller registers
RATIO_ENG_REPT
CH_SEN_CTRL
Register Name
DATA_TYPE
CH_DATA-n
CAL_MOD
MAF_SET
CAL_INT
CH_SEL
_CTRL
Doc ID 16174 Rev 2
Reset Value
0x00000000
0x0000
0x00
0x00
0x00
0x00
0x00
0x00
R/W
R/W
RW
RW
RW
RW
RW
RW
RW
Capacitive sensor control
Ratio engine report control
(only available in final silicon)
Selects active capacitive channels
10mS – 64S calibration interval
Selects calibration model
Median averaging filter (MAF) setting
Selects type of data available in
channel data ports.
0x01: TVR
0x02: EVR
0x03: Channel delay
0x04: Impedance (13-bit)
0x05: Calibrated impedance (13-bit)
0x06: Locked impedance (13-bit)
Channel data based on channel data
type
Touch sensor controller
Description
47/83