• Extended temperature version -ET uses silicon revision H
• Low supply voltage range:
  3.6 V down to 1.8 V
• Ultralow power consumption
  • Active mode (AM):
    all system clocks active
    230 µA/MHz at 8 MHz, 3.0 V, flash program execution (typical)
    110 µA/MHz at 8 MHz, 3.0 V, RAM program execution (typical)
  • Standby mode (LPM3):
    real-time clock with crystal, watchdog, and supply supervisor operational, full RAM retention, fast wake-up:
    1.7 µA at 2.2 V, 2.1 µA at 3.0 V (typical)
    low-power oscillator (VLO), general-purpose counter, watchdog, and supply supervisor operational, full RAM retention, fast wake-up:
    1.2 µA at 3.0 V (typical)
  • Off mode (LPM4):
    full RAM retention, supply supervisor operational, fast wake-up:
    1.2 µA at 3.0 V (typical)
  • Shutdown mode (LPM4.5):
    0.1 µA at 3.0 V (typical)
• Wake-up from standby mode in 3.5 µs (typical)
• 16-bit RISC architecture
  • Extended memory
  • Up to 25-MHz system clock
• Flexible power management system
  • Fully integrated LDO with programmable regulated core supply voltage
  • Supply voltage supervision, monitoring, and brownout
• Unified clock system
  • FLL control loop for frequency stabilization
  • Low-power low-frequency internal clock source (VLO)
  • Low-frequency trimmed internal reference source (REFO)
  • 32-kHz crystals
  • High-frequency crystals up to 32 MHz ⁽¹⁾
• 16-bit timer TA0, Timer_A with five capture/compare registers
• 16-bit timer TA1, Timer_A with three capture/compare registers
• 16-bit timer TB0, Timer_B with seven capture/compare shadow registers
• Up to four universal serial communication interfaces
  • USCI_A0, USCI_A1, USCI_A2, and USCI_A3 each supporting
    • Enhanced UART supporting automatic baud-rate detection
    • IrDA encoder and decoder
    • Synchronous SPI
  • USCI_B0, USCI_B1, USCI_B2, and USCI_B3 each supporting
    • I²C
    • Synchronous SPI
• 12-bit analog-to-digital converter (ADC)
  • Internal reference
  • Sample-and-hold
  • Autoscan feature
  • 14 external channels, 2 internal channels
• Hardware multiplier supporting 32-bit operations
• Serial onboard programming, no external programming voltage needed
• 3-channel internal DMA
• Basic timer with real-time clock feature
• Wide operational range: –40°C to 125°C (Q temp), –55°C to 125°C (M temp) (some noted parameters specified for –40°C to 85°C only)
• Available SnAgCu (ZCA) or SnPb (GCA) ball material

• Supports defense, aerospace, and medical applications
  • Controlled baseline
  • One assembly and test site
  • One fabrication site
  • Available in extended (–55°C to 125°C) temperature range
  • Extended product life cycle
  • Extended product-change notification
  • Product traceability

The MSP430F5438A-ET is an ultralow-power microcontroller. The architecture, combined with extensive 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 3.5 µs (typical).

The MSP430F5438A-ET is a microcontroller configuration with three 16-bit timers, a high-performance 12-bit analog-to-digital converter (ADC), up to 4 universal serial communication interfaces (USCIs), a hardware multiplier, a DMA, a real-time clock (RTC) module with alarm capabilities, and up to 87 I/O pins. For complete module descriptions, see the MSP430F5xx and MSP430F6xx Family User's Guide.

Typical applications for this device include analog and digital sensor systems, digital motor control, remote controls, thermostats, digital timers, and hand-held meters.

Figure 4-1 shows the functional block diagram.

Figure 4-1 MSP430F5438-ET Functional Block Diagram

Figure 6-1 shows the pinout for the 113-pin ZCA, GCA, and ZQW packages. Only the default signal names are shown here; for all multiplexed signals, see Section 6.2.

Figure 6-1 113-Pin ZCA, GCA or ZQW Package (Top View)

Table 6-1 describes the signals.