TI MSP430FE423AIPMR

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 6 μs.

The MSP430FE42xA series are microcontroller configurations with three independent 16-bit sigma-delta A/D converters and embedded signal processor core used to measure and calculate single-phase energy in both 2-wire and 3-wire configurations. Also included are a built-in 16-bit timer, 128 LCD segment drive capability, and 14 I/O pins.

Typical applications include 2-wire and 3-wire single-phase metering including tamper-resistant meter implementations.

The MSP430 CPU has a 16-bit RISC architecture that is highly transparent to the application. All operations, other than program-flow instructions, are performed as register operations in conjunction with seven addressing modes for source operand and four addressing modes for destination operand.

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

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

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

The MSP430 has one active mode and five software selectable low-power modes of operation. An interrupt event can wake up the device from any of the five low-power modes, service the request, and restore back to the low-power mode on return from the interrupt program.

The following six operating modes can be configured by software:

Active mode (AM) All clocks are active. Low-power mode 0 (LPM0) CPU is disabled. ACLK and SMCLK remain active, MCLK is available to modules. FLL+ loop control remains active. Low-power mode 1 (LPM1) CPU is disabled. ACLK and SMCLK remain active, MCLK is available to modules. FLL+ loop control is disabled. Low-power mode 2 (LPM2) CPU is disabled. MCLK, FLL+ loop control, and DCOCLK are disabled. DCO dc generator remains enabled. ACLK remains active. Low-power mode 3 (LPM3) CPU is disabled. MCLK, FLL+ loop control, and DCOCLK are disabled. DCO dc generator is disabled. ACLK remains active. Low-power mode 4 (LPM4) CPU is disabled. ACLK is disabled. MCLK, FLL+ loop control, and DCOCLK are disabled. DCO dc generator is disabled. Crystal oscillator is stopped.

• Low Supply-Voltage Range, 2.7 V to 3.6 V
• Ultra-Low Power Consumption:
  • Active Mode: 400 μA at 1 MHz, 3.0 V
  • Standby Mode: 1.6 μA
  • Off Mode (RAM Retention): 0.1 μA
• Five Power-Saving Modes
• Wake-Up From Standby Mode in Less Than 6 μs
• Frequency-Locked Loop, FLL+
• 16-Bit RISC Architecture, 125-ns Instruction Cycle Time
• Embedded Signal Processing for Single-Phase Energy Metering With Integrated Analog Front-End and Temperature Sensor (ESP430CE1A)
• 16-Bit Timer_A With Three Capture/Compare Registers
• Integrated LCD Driver for 128 Segments
• Serial Communication Interface (USART), Asynchronous UART or Synchronous SPI Selectable by Software
• Brownout Detector
• Supply Voltage Supervisor/Monitor With Programmable Level Detection
• Serial Onboard Programming, No External Programming Voltage Needed, Programmable Code Protection by Security Fuse
• Bootstrap Loader in Flash Devices
• Available in 64-Pin Quad Flat Pack (QFP)

• 2-wire and 3-wire single-phase metering including tamper-resistant meter implementations