TI MSP430G2553IN20

The MSP430 family of ultra-low-power microcontrollers consists of multiple devices featuring different peripheral sets tailored for various applications. This architecture, combined with 5 low-power modes, is optimized to extend battery life in portable measurement applications. The device features a powerful 16-bit RISC CPU, 16-bit registers, and a constant generator that helps maximize code efficiency. The digitally controlled oscillator (DCO) enables wake-up from low-power mode to active mode in less than 1µs.

The MSP430G2x13 and MSP430G2x53 series are ultra-low-power mixed-signal microcontrollers featuring an integrated 16-bit timer, up to 24 I/O pins with touch-sensing capability, a versatile analog comparator, and built-in communication capability via a universal serial communication interface. In addition, members of the MSP430G2x53 series also include a 10-bit analog-to-digital (A/D) converter. Typical applications include low-cost sensor systems that capture analog signals, convert them to digital values, and then process the data for display or transmission to a host system.

The MSP430 CPU features a 16-bit RISC architecture that is highly transparent to the application. All operations (except program flow instructions) are executed as register operations with 7 addressing modes for source operands and 4 addressing modes for destination operands.

The CPU integrates 16 registers to provide reduced instruction execution time. Register-to-register operation execution time is one cycle of the CPU clock.

Four of these registers (R0 through R3) are dedicated as the program counter, stack pointer, status register, and constant generator, respectively. The remaining registers are general-purpose registers.

Peripherals are connected to the CPU via data, address, and control buses and can be controlled using all instructions.

The instruction set includes 51 core instructions with 3 formats and 7 addressing modes, plus additional instructions for extended address range. Each instruction can operate on both word and byte data.

The MSP430 features one active mode and 5 low-power operating modes selectable by software. An interrupt event can wake the device from any low-power mode, process the request, and return to the low-power mode upon receiving the return signal from the interrupt routine.

• Low supply voltage range: 1.8V to 3.6V
• Ultra-low power consumption
• Active mode: 230μA (at 1MHz, 2.2V)
• Standby mode: 0.5μA
• Off mode (RAM retention): 0.1μA
• 5 power-saving modes
• Ultra-fast wake-up from standby in less than 1μs
• 16-bit RISC architecture, 62.5ns instruction cycle time
• Internal oscillator up to 16MHz with four calibrated frequencies
• Internal ultra-low-power LF oscillator
• 32kHz crystal oscillator
• External digital clock source
• Two 16-bit Timer_A, each with three capture/compare registers
• Up to 24 I/O pins supporting touch sensing
• USCI
• Enhanced UART with automatic baud rate detection
• IrDA encoder and decoder
• Synchronous SPI
• I²C
• On-chip comparator for analog signal comparison or slope A/D conversion
• 10-bit 200ksps ADC with internal reference, sample-and-hold, and auto-scan
• Brownout detector
• Serial in-system programming, no external programming voltage required, programmable code protection via security fuse
• On-chip emulation logic with two-wire (Spy-Bi-Wire) interface

• Low-cost sensor systems