MPR121QR2 Freescale Semiconductor, MPR121QR2 Datasheet - Page 37

• Manufacturer Part Number: MPR121QR2
• Description: IC CTLR TOUCH SENSOR 20-QFN
• Manufacturer: Freescale Semiconductor
• Type: Capacitive, Proximity Sensorr

Specifications of MPR121QR2

• Number Of Inputs/keys: 12 Key
• Data Interface: I²C, Serial
• Voltage - Supply: 1.71 V ~ 3.6 V
• Current - Supply: 29µA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 20-UQFN, 20-µQFN
• Output Type: Logic
• Interface: I²C
• Input Type: Logic
• Supply Voltage: 2.5 V to 3.6 V
• Dimensions: 3 mm L x 3 mm W x 0.65 mm H
• Temperature Range: - 40 C to + 85 C
• Termination Style: SMD/SMT
• Supply Current: 29µA
• Ic Interface Type: I2C
• Supply Voltage Range: 1.71V To 3.6V
• Sensor Case Style: QFN
• No. Of Pins: 20
• Operating Temperature Range: -40°C To +85°C
• Interface Type: I2C
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: MPR121QR2; MPR121QR2TR

Sensors
Freescale Semiconductor
TOUCH THRESHOLD REGISTER
RELEASE THRESHOLD REGISTER
Table 31. Touch Threshold Register Field Descriptions
Table 32. Release Threshold Register Field Descriptions
Reset:
Reset:
Field
Field
RTH
TTH
7:0
7:0
W
W
R
R
7
0
7
0
= Unimplemented
= Unimplemented
Touch Threshold – The Touch Threshold Byte sets the trip point for detecting a
touch.
00000000 Encoding 0
~
11111111 Encoding 255
Release Threshold – The Release Threshold Byte sets the trip point for detecting
a touch.
00000000 Encoding 0
~
11111111 Encoding 255
6
0
6
0
Figure 44. Release Threshold Register
Figure 43. Touch Threshold Register
5
0
5
0
4
0
4
0
RTH
TTH
Description
Description
3
0
3
0
2
0
2
0
1
0
1
0
0
0
0
0
MPR121
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