MSP430F5438A-ET数据手册TI中文资料规格书

描述 Description

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 theMSP430F5xx 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.

特性 Features

• 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


• 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

Use of crystals is not ensured above 85°C for both 32-kHz and high-frequency crystals.