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. 7
ELE3 Electrode Current CDC3 0x62 0x00
Register
Address + 1
ELE4 Electrode Current CDC4 0x63 0x00
ELE5 Electrode Current CDC5 0x64 0x00
ELE6 Electrode Current CDC6 0x65 0x00
ELE7 Electrode Current CDC7 0x66 0x00
ELE8 Electrode Current CDC8 0x67 0x00
ELE9 Electrode Current CDC9 0x68 0x00
ELE10 Electrode Current CDC10 0x69 0x00
ELE11 Electrode Current CDC11 0x6A 0x00
ELEPROX Electrode Current CDCPROX 0x6B 0x00
ELE0, ELE1 Charge Time CDT1 CDT0 0x6C 0x00
ELE2, ELE3 Charge Time CDT3 CDT2 0x6D 0x00
ELE4, ELE5 Charge Time CDT5 CDT4 0x6E 0x00
ELE6, ELE7 Charge Time CDT7 CDT6 0x6F 0x00
ELE8, ELE9 Charge Time CDT9 CDT8 0x70 0x00
ELE10, ELE11 Charge Time CDT11 CDT10 0x71 0x00
ELEPROX Charge Time CDTPROX 0x72 0x00
GPIO Control Register 0 CTL011 CTL010 CTL09 CTL08 CTL07 CTL06 CTL05 CTL04 0x73 0x00
GPIO Control Register 1 CTL111 CTL110 CTL19 CTL18 CTL17 CTL16 CTL15 CTL14 0x74 0x00
GPIO Data Register DAT11 DAT10 DAT9 DAT8 DAT7 DAT6 DAT5 DAT4 30x75 0x00
GPIO Direction Register DIR11 DIR10 DIR9 DIR8 DIR7 DIR6 DIR5 DIR4 0x76 0x00
GPIO Enable Register EN11 EN10 EN9 EN8 EN7 EN6 EN5 EN4 0x77 0x00
GPIO Data Set Register SET11 SET10 SET9 SET8 SET7 SET6 SET5 SET4 0x78 0x00
GPIO Data Clear Register CLR11 CLR10 CLR9 CLR8 CLR7 CLR6 CLR5 CLR4 0x79 0x00
GPIO Data Toggle Register TOG11 TOG10 TOG9 TOG8 TOG7 TOG6 TOG5 TOG4 0x7A 0x00
AUTO-CONFIG Control Register 0 FFI RETRY BVA ARE ACE 0x7B 0x00
AUTO-CONFIG Control Register 1 SCTS OORIE ARFIE ACFIE 0x7C 0x00
AUTO-CONFIG USL Register USL 0x7D 0x00
AUTO-CONFIG LSL Register LSL 0x7E 0x00
AUTO-CONFIG Target Level Register TL 0x7F 0x00 0x00
Soft Reset Register SRST 0x80
Table 2. Register Map
REGISTER Fields
Register
Address
Initial
Value
Auto-
Increment
Address