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DATA SHEET
MSP430FR263x, MSP430FR253x Capacitive Touch Sensing Mixed-Signal Microcontrollers
1 Device Overview
1.1 Features
CapTIvate™ technology – capacitive touch
Performance
Fast electrode scanning with four simultaneous scans
Support for high-resolution sliders with up to 1024 points
Proximity sensing
Reliability
Increased immunity to power line, RF, and other environmental noise
Built-in spread spectrum, automatic tuning, noise filtering, and debouncing algorithms
Enables reliable touch solutions with 10-V RMS common-mode noise, 4-kV electrical fast transients, and 15-kV electrostatic discharge, allowing for IEC‑61000-4-6, IEC‑61000-4-4, and IEC‑61000-4-2 compliance
Reduced RF emissions to simplify electrical designs
Support for metal touch and water rejection designs
Flexibility
Low power
<5 µA wake-on-touch with four sensors
Wake-on-touch state machine allows electrode scanning while CPU is asleep
Hardware acceleration for environmental compensation, filtering, and threshold detection
Ease of use
CapTIvate Design Center PC GUI lets engineers design and tune capacitive buttons in real time without having to write code
CapTIvate software library in ROM provides ample FRAM for customer application
Embedded microcontroller
16-bit RISC architecture
Clock supports frequencies up to 16 MHz
Wide supply voltage range from 3.6 V down to 1.8 V (minimum supply voltage is restricted by SVS levels, see the SVS specifications )
Optimized ultra-low-power modes
Active mode: 126 µA/MHz (typical)
Standby:<5 µA wake-on-touch with four sensors
LPM3.5 real-time clock (RTC) counter with 32768-Hz crystal: 730 nA (typical)
Shutdown (LPM4.5): 16 nA (typical)
High-performance analog
8-channel 10-bit analog-to-digital converter (ADC)
Internal 1.5-V reference
Sample-and-hold 200 ksps
Enhanced serial communications
Two enhanced universal serial communication interfaces (eUSCI_A) support UART, IrDA, and SPI
One eUSCI (eUSCI_B) supports SPI and I2 C
Intelligent digital peripherals
Four 16-bit timers
Two timers with three capture/compare registers each (Timer_A3)
Two timers with two capture/compare registers each (Timer_A2)
One 16-bit timer associated with CapTIvate technology
One 16-bit counter-only RTC
16-bit cyclic redundancy check (CRC)
Low-power ferroelectric RAM (FRAM)
Up to 15.5KB of nonvolatile memory
Built-in error correction code (ECC)
Configurable write protection
Unified memory of program, constants, and storage
1015 write cycle endurance
Radiation resistant and nonmagnetic
High FRAM-to-SRAM ratio, up to 4:1
Clock system (CS)
On-chip 32-kHz RC oscillator (REFO)
On-chip 16-MHz digitally controlled oscillator (DCO) with frequency-locked loop (FLL)
±1% accuracy with on-chip reference at room temperature
On-chip very low-frequency 10-kHz oscillator (VLO)
On-chip high-frequency modulation oscillator (MODOSC)
External 32-kHz crystal oscillator (LFXT)
Programmable MCLK prescalar of 1 to 128
SMCLK derived from MCLK with programmable prescalar of 1, 2, 4, or 8
General input/output and pin functionality
Total of 19 I/Os on TSSOP-32 package
16 interrupt pins (P1 and P2) can wake MCU from low-power modes
Development tools and software
Development tools
Ease-of-use ecosystem
Family members (also see Device Comparison )
MSP430FR2633: 15KB of program FRAM, 512 bytes of information FRAM, 4KB of RAM, up to 16 self-capacitive or 64 mutual-capacitive sensors
MSP430FR2533: 15KB of program FRAM, 512 bytes of information FRAM, 2KB of RAM, up to 16 self-capacitive or 24 mutual-capacitive sensors
MSP430FR2632: 8KB of program FRAM, 512 bytes of information FRAM, 2KB of RAM, up to 8 self-capacitive or 16 mutual-capacitive sensors
MSP430FR2532: 8KB of program FRAM, 512 bytes of information FRAM, 1KB of RAM, up to 8 self-capacitive or 8 mutual-capacitive sensors
Package options
32 pin: VQFN (RHB)
32 pin: TSSOP (DA)
24 pin: VQFN (RGE)
24-pin: DSBGA (YQW)