Datasheet
Table Of Contents
- Proximity Capacitive Touch Sensor Controller
- 1 Pin Descriptions
- 2 Schematic Drawings and Implementation
- 3 Device Operation Overview
- 4 Electrical Characteristics
- 5 Register Operation Descriptions
- 5.1 Register Read/Write Operations and Measurement Run/Stop Mode
- 5.2 Touch Status Registers (0x00~0x01)
- 5.3 Electrode Filtered Data Register (0x04~0x1D)
- 5.4 Baseline Value Register (0x1E~0x2A)
- 5.5 Baseline Filtering Control Register (0x2B~0x40)
- 5.6 Touch / Release Threshold (0x41~0x5A)
- 5.7 Debounce Register (0x5B)
- 5.8 Filter and Global CDC CDT Configuration (0x5C, 0x5D)
- 5.9 Electrode Charge Current Register (0x5F~0x6B)
- 5.10 Electrode Charge Time Register (0x6C~0x72)
- 5.11 Electrode Configuration Register (ECR, 0x5E)
- 5.12 Out-Of-Range Status Registers (0x02, 0x03)
- 5.13 Soft Rest Register (0x80)
- 5.14 GPIO Registers (0x73~0x7A)
- 6 MPR121 Serial Communication
- Disclaimer
MPR121
Sensors
Freescale Semiconductor, Inc. 5
Table 2. Register Map
REGISTER Fields
Register
Address
Initial
Value
Auto-
Increment
Address
ELE0 - ELE7 Touch Status ELE7 ELE6 ELE5 ELE4 ELE3 ELE2 ELE1 ELE0 0x00 0x00
Register
Address + 1
ELE8 - ELE11, ELEPROX Touch Status OVCF ELEPROX ELE11 ELE10 ELE9 ELE8 0x01 0x00
ELE0-7 OOR Status E7_OOR E6_OOR E5_OOR E4_OOR E3_OOR E2_OOR E1_OOR E0_OOR 0x02 0x00
ELE8-11, ELEPROX OOR Status ACFF ARFF
PROX_OOR
E11_OOR E10_OOR E9_OOR E8_OOR 0x03 0x00
ELE0 Electrode Filtered Data LSB EFD0LB 0x04 0x00
ELE0 Electrode Filtered Data MSB EFD0HB 0x05 0x00
ELE1 Electrode Filtered Data LSB EFD1LB 0x06 0x00
ELE1 Electrode Filtered Data MSB EFD1HB 0x07 0x00
ELE2 Electrode Filtered Data LSB EFD2LB 0x08 0x00
ELE2 Electrode Filtered Data MSB EFD2HB 0x09 0x00
ELE3 Electrode Filtered Data LSB EFD3LB 0x0A 0x00
ELE3 Electrode Filtered Data MSB EFD3HB 0x0B 0x00
ELE4 Electrode Filtered Data LSB EFD4LB 0x0C 0x00
ELE4 Electrode Filtered Data MSB EFD4HB 0x0D 0x00
ELE5 Electrode Filtered Data LSB EFD5LB 0x0E 0x00
ELE5 Electrode Filtered Data MSB EFD5HB 0x0F 0x00
ELE6 Electrode Filtered Data LSB EFD6LB 0x10 0x00
ELE6 Electrode Filtered Data MSB EFD6HB 0x11 0x00
ELE7 Electrode Filtered Data LSB EFD7LB 0x12 0x00
ELE7 Electrode Filtered Data MSB EFD7HB 0x13 0x00
ELE8 Electrode Filtered Data LSB EFD8LB 0x14 0x00
ELE8 Electrode Filtered Data MSB EFD8HB 0x15 0x00
ELE9 Electrode Filtered Data LSB EFD9LB 0x16 0x00
ELE9 Electrode Filtered Data MSB EFD9HB 0x17 0x00
ELE10 Electrode Filtered Data LSB EFD10LB 0x18 0x00
ELE10 Electrode Filtered Data MSB EFD10HB 0x19 0x00
ELE11 Electrode Filtered Data LSB EFD11LB 0x1A 0x00
ELE11 Electrode Filtered Data MSB EFD11HB 0x1B 0x00
ELEPROX Electrode Filtered Data LSB EFDPROXLB 0x1C 0x00
ELEPROX Electrode Filtered Data MSB EFDPROXHB 0x1D 0x00
ELE0 Baseline Value E0BV 0x1E 0x00
ELE1 Baseline Value E1BV 0x1F 0x00
ELE2 Baseline Value E2BV 0x20 0x00
ELE3 Baseline Value E3BV 0x21 0x00
ELE4 Baseline Value E4BV 0x22 0x00
ELE5 Baseline Value E5BV 0x23 0x00
ELE6 Baseline Value E6BV 0x24 0x00
ELE7 Baseline Value E7BV 0x25 0x00
ELE8 Baseline Value E8BV 0x26 0x00
ELE9 Baseline Value E9BV 0x27 0x00
ELE10 Baseline Value E10BV 0x28 0x00
ELE11 Baseline Value E11BV 0x29 0x00
ELEPROX Baseline Value EPROXBV 0x2A 0x00
MHD Rising MHDR 0x2B 0x00
NHD Amount Rising NHDR 0x2C 0x00
NCL Rising NCLR 0x2D 0x00
FDL Rising FDLR 0x2E 0x00
MHD Falling MHDF 0x2F 0x00
NHD Amount Falling NHDF 0x30 0x00