MSP430F5324IRGCR


MSP430 de 16 bits, Flash de 64 KB, SRAM de 6 KB, ADC de 12 bits, LPM4.5 de 0,18 µA, activación de 3,5 µs, VQFN-64, 1,8-3,6 V

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Pieza del fabricante:

MSP430F5324IRGCR

Paquete:

VQFN-64 (RGC) (9,0 x 9,0 x 0,95 mm, paso de 0,5 mm, almohadilla expuesta)

Marca:
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Descripción

El MSP430F5324IRGCR de Texas Instruments es una MCU MSP430 de 16 bits y consumo ultrabajo en un encapsulado VQFN de 64 patillas (9×9 mm). Sus principales características son: CPU de 25 MHz, Flash de 64 KB, SRAM de 6 KB, ADC SAR de 12 bits (10 canales), 8 comparadores, multiplicador por hardware (32 bits), DMA de 3 canales, 2 módulos USCI (cada uno compatible con UART/SPI e I2C), 4 temporizadores de 16 bits (Timer_A ×3, Timer_B ×1), 47 GPIO y RTC con alarma. La tensión de funcionamiento es de 1,8 V a 3,6 V. Consumo: 290 µA/MHz en activo (Flash), 1,9 µA en espera (LPM3 con RTC), 0,18 µA en apagado (LPM4.5), con un despertar de 3,5 µs desde el modo de espera. Rango de temperatura industrial de -40°C a +85°C.

El MSP430F5324 pertenece a la familia MSP430F532x de microcontroladores de señal mixta de 16 bits y consumo ultrabajo de TI. La variante ‘5324’ proporciona 64 KB de memoria Flash, 6 KB de SRAM y 47 patillas de E/S en un encapsulado VQFN de 64 patillas, posicionado como dispositivo de gama media entre los miembros más pequeños de 28 patillas y los más grandes de 80 patillas de la familia.

La arquitectura del MSP430 está optimizada para un funcionamiento de bajo consumo mediante una combinación de gestión flexible del reloj, múltiples modos de bajo consumo y un LDO integrado. El sistema de reloj unificado incluye un oscilador controlado digitalmente (DCO) para un despertar rápido (3,5 µs desde el modo de espera), un FLL para estabilización de frecuencia, un oscilador de cristal de 32 kHz (XT1) para RTC y un oscilador de cristal de alta frecuencia (XT2) de hasta 32 MHz. El LDO en chip regula la alimentación del núcleo, lo que permite al dispositivo funcionar con una única alimentación de 1,8 V a 3,6 V.

Los cinco modos de bajo consumo son el sello distintivo del MSP430. El modo activo consume 290 µA/MHz de Flash (150 µA/MHz de RAM). LPM3 (espera con RTC, WDT y supervisor de alimentación activos) consume sólo 1,9 µA a 2,2 V. LPM4 (modo apagado con retención de RAM y supervisor de alimentación) consume 1,1 µA. LPM4.5 (apagado sin retención de RAM) consume sólo 0,18 µA - aproximándose a la tasa de autodescarga de una pila de botón.

Cada uno de los dos módulos USCI admite el funcionamiento con dos protocolos: USCI_A proporciona UART (con detección automática de baudios) y SPI, mientras que USCI_B proporciona I2C y SPI. Esto permite simultanear UART + I2C, o SPI + I2C, o cualquier combinación. El ADC de 12 bits incluye una referencia interna, sample-and-hold y auto-scan para el muestreo secuencial de canales sin intervención de la CPU.

El multiplicador hardware admite operaciones de 32 bits (32×32 → resultado de 64 bits) en un solo ciclo de instrucción, lo que acelera los algoritmos de tipo DSP. El DMA de 3 canales descarga las transferencias de memoria de la CPU, permitiendo transferencias ADC-a-RAM o UART-a-RAM sin sobrecarga de la CPU.

Las aplicaciones típicas incluyen registradores de datos alimentados por batería, nodos de sensores inalámbricos, instrumentos médicos portátiles y sistemas de medición inteligentes en los que una corriente de reposo ultrabaja y un despertar rápido son esenciales para prolongar la vida útil de la batería.

**Núcleo de la CPU del MSP430:** El MSP430 utiliza una arquitectura RISC de 16 bits con registros de 16 bits y un generador de constantes para una codificación eficaz de las instrucciones. Las 27 instrucciones del núcleo manejan la mayoría de las operaciones; las instrucciones emuladas adicionales proporcionan comodidad. La arquitectura Von Neumann utiliza un único espacio de direcciones para Flash, SRAM y periféricos. La CPU funciona hasta a 25 MHz con operaciones de registro a registro de un solo ciclo.

**Sistema de Reloj Unificado (UCS):** El UCS gestiona cuatro fuentes de reloj: XT1 (cristal de 32 kHz), XT2 (cristal de alta frecuencia de hasta 32 MHz), DCO (oscilador controlado digitalmente, arranque rápido) y VLO (interno de baja frecuencia, 10 kHz típico). El FLL multiplica la referencia de 32 kHz para generar un MCLK y un SMCLK estables. El DCO arranca en microsegundos, permitiendo el wake-up de 3,5 µs desde LPM3.

**Modos de bajo consumo:** Cinco modos de bajo consumo equilibran funcionalidad y consumo. LPM0 mantiene SMCLK en funcionamiento (eventos basados en temporizador). LPM3 mantiene activos sólo ACLK (32 kHz) y RTC (activación periódica). LPM4 desactiva todos los relojes pero mantiene la SRAM (interrupción del wake-up). El LPM4.5 desactiva el LDO por completo, perdiendo el contenido de la SRAM pero consiguiendo 0,18 µA (reactivación por reinicio). El principio clave del diseño: pasar la mayor parte del tiempo en reposo profundo, despertarse brevemente para tomar medidas y luego volver al reposo.

**Comunicación USCI:** Cada módulo USCI utiliza un registro de desplazamiento compartido con generadores de velocidad de transmisión independientes para los modos UART e I2C/SPI. El cambio entre protocolos requiere reconfiguración pero no un cambio de hardware. La UART soporta detección automática de baudios para velocidades desconocidas. I2C soporta maestro/esclavo con arbitraje multimaestro y estiramiento de reloj.

Grupo Pin Cuenta Funciones clave Notas
Potencia (DVCC/DVSS) 4 pares Alimentación digital de 1,8-3,6 V; AVCC/AVSS para analógica Bypass de cada DVCC con cerámica de 0,1µF; AVCC alimenta ADC y comparadores
PUERTO1 (P1.0-P1.7) 8 GPIO con interrupción; TA0 CCR0-4; ADC A0-A7; entradas de comparador; TMS/TCK (JTAG) P1.0 puede emitir ACLK; P1.2/P1.3 son pines USCI_B0 I2C por defecto
PUERTO2 (P2.0-P2.7) 8 GPIO con interrupción; TA1 CCR0-2; ADC A8-A9; salidas de comparador; TDI/TDO (JTAG) P2.0 puede emitir SMCLK; P2.4/P2.5 son USCI_A0 UART por defecto
PUERTO3 (P3.0-P3.7) 8 Salidas TA0; USCI_A0 SPI (UCA0CLK/SIMO/SOMI); USCI_B0 SPI El puerto 3 gestiona la mayoría de las asignaciones de pines SPI para ambos módulos USCI
PUERTO4 (P4.0-P4.7) 8 TA2 CCR0-2; salidas TB0; patillas de cristal XT1; ADC A10-A12 P4.0/P4.1 son XT1 IN/OUT (cristal 32kHz); P4.2-P4.4 son salidas TB0
PUERTO5-11 15 USCI_A1 (UART/SPI); USCI_B1 (I2C/SPI); cristal XT2; ADC adicional; control DMA Proporciona segundas patillas de puerto USCI; XT2 en P5.2/P5.3 para cristal de alta frecuencia
RST/NMI 1 Reset / interrupción no enmascarable; activo bajo; pull-up interno Se recomienda un pull-up externo y un cap de desacoplamiento para un reset limpio
Aplicación Descripción
Registrador de datos a pilas Activación desde LPM3 por alarma RTC (1,9µA en espera); muestreo de canales ADC mediante autoescaneado; almacenamiento en SRAM mediante DMA; transmisión mediante UART/I2C cuando el búfer está lleno; 0,18µA LPM4.5 en reposo prolongado; funcionamiento con pila de botón durante años.
Nodo sensor inalámbrico LPM3 entre transmisiones de radio; multiplicador de hardware para cálculo CRC/RSSI; USCI_A para UART a módulo de radio; USCI_B para sensores I2C; el wake-up de 3,5µs permite la detección de eventos con capacidad de respuesta.
Instrumental médico portátil ADC de 12 bits para la adquisición de bioseñales; comparadores para la detección de umbrales; DMA descarga la transferencia de ADC a RAM; RTC registra las lecturas; amplio voltaje (1,8-3,6 V) para el funcionamiento directo con pilas de litio.
Modelo Fabricante Compatibilidad Diferencia clave
MSP430F5329IPN TI Actualización de la serie 128 KB de Flash / 8 KB de SRAM; LQFP de 80 patillas; 63 E/S; mismos periféricos; más memoria y patillas; se utiliza cuando la Flash de 64 KB es insuficiente
MSP430F5328IZQE TI Serie Alternativa Flash de 64 KB / SRAM de 6 KB; BGA de 80 patillas (5x5 mm); mismos periféricos; menor tamaño; para diseños ultracompactos
MSP430F5524IRGCR TI Mejora funcional Misma disposición de pines VQFN-64; añade USB 2.0 PHY; 64-KB Flash / 4-KB SRAM; se utiliza cuando se requiere conectividad USB
STM32L052C8T6 ST Alternativa competitiva ARM Cortex-M0+ de 32 bits; Flash de 64 KB / SRAM de 8 KB; USB 2.0; ADC de 12 bits; LQFP-48; 0,27µA en espera; se utiliza cuando se prefiere el rendimiento de 32 bits.
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