1FEATURES
• Low Supply Voltage Range: 1.8 V to 3.6 V
• Ultra-Low Power Consumption
– Active Mode: 250 μA at 1 MHz, 2.2 V
– Standby Mode: 0.7 μA
– Off Mode (RAM Retention): 0.1 μA
• Ultra-Fast Wake-Up From Standby Mode in
Less Than 1 μs
• 16-Bit RISC Architecture, 62.5-ns Instruction
Cycle Time
• Basic Clock Module Configurations
– Internal Frequencies up to 16 MHz With
Four Calibrated Frequencies to ±1%
– 32-kHz Crystal
– High-Frequency Crystal up to 16 MHz
– Resonator
– External Digital Clock Source
• 16-Bit Timer_A With Three Capture/Compare
Registers
• On-Chip Comparator for Analog Signal
Compare Function or Slope Analog-to-Digital
(A/D) Conversion
• Brownout Detector
• Serial Onboard Programming, No External
Programming Voltage Needed, Programmable
Code Protection by Security Fuse
• Bootstrap Loader
• On Chip Emulation Module
• Family Members:
– MSP430F2101
– 1KB + 256B Flash Memory
– 128B RAM
– MSP430F2111
– 2KB + 256B Flash Memory
– 128B RAM
– MSP430F2121
– 4KB + 256B Flash Memory
– 256B RAM
– MSP430F2131
– 8KB + 256B Flash Memory
– 256B RAM
• Available in a 20-Pin Plastic Small-Outline
Wide Body (SOWB) Package, 20-Pin Plastic
Small-Outline Thin (TSSOP) Package, 20-Pin
TVSOP Package, and 24-Pin QFN Package
• For Complete Module Descriptions, See the
MSP430x2xx Family User’s Guide (SLAU144)

DESCRIPTION
The Texas Instruments MSP430 family of ultra-low-power microcontrollers consist of several devices featuring
different sets of peripherals targeted for various applications. The architecture, combined with five low-power
modes, is optimized to achieve extended battery life in portable measurement applications. The device features a
powerful 16-bit RISC CPU, 16-bit registers, and constant generators that contribute to maximum code
efficiency.The digitally controlled oscillator (DCO) allows wake-up from low-power modes to active mode in less
than 1 μs.
The MSP430x21x1 series is an ultra-low-power mixed signal microcontroller with a built-in 16-bit timer, versatile
analog comparator, and sixteen I/O pins.
Typical applications include sensor systems that capture analog signals, convert themto digital values, and then
process the data for display or for transmission to a host system. Stand-alone RF sensor front end is another
area of application. The analog comparator provides slope A/D conversion capability.