FCTL1, Flash Memory Control Register

Flash Memory Registers

FRKEY, Read as 096h

FWKEY, Must be written as 0A5h

BLKWRT

WRT

Reserved

MERAS

ERASE

Reserved

rw−0

FRKEY/	Bits	FCTLx password. Always read as 096h. Must be written as 0A5h or a PUC
FWKEY	15-8	will be generated.
BLKWRT	Bit 7	Block write mode. WRT must also be set for block write mode. BLKWRT is
		automatically reset when EMEX is set.
		0	Block-write mode is off
		1	Block-write mode is on
WRT	Bit 6	Write. This bit is used to select any write mode. WRT is automatically reset
		when EMEX is set.
		0	Write mode is off
		1	Write mode is on
Reserved	Bits	Reserved. Always read as 0.
	5-3
MERAS	Bit 2	Mass erase and erase. These bits are used together to select the erase mode.
ERASE	Bit 1	MERAS and ERASE are automatically reset when EMEX is set.

		MERAS ERASE		Erase Cycle

		0	0	No erase
		0	1	Erase individual segment only
		1	0	Erase all main memory segments
		1	1	Erase all main and information memory segments
Reserved	Bit 0	Reserved. Always read as 0.

5-18	Flash Memory Controller

MSP430x1xx specifications

The Texas Instruments MSP430x1xx series is a family of ultra-low-power microcontrollers that are highly regarded in the embedded systems community for their versatility and performance. Designed for applications ranging from portable instrumentation to low-power industrial devices, the MSP430x1xx combines flexibility and efficiency with advanced features tailored for energy-sensitive applications.

One of the standout characteristics of the MSP430x1xx is its ultra-low-power operation. This series offers several low-power modes that can significantly extend battery life in portable devices. The microcontroller can be in active mode, low-power mode, or even in a deep sleep state, allowing developers to optimize power consumption based on the application's requirements. In fact, some configurations can operate at just a few microamps, making it ideal for battery-operated devices.

Another key feature is the 16-bit RISC architecture that provides powerful processing capabilities while maintaining a low power profile. The MSP430x1xx series supports a maximum clock speed of 16 MHz, allowing for efficient task execution while consuming minimal energy. This architecture ensures that programs run smoothly while the microcontroller remains energy efficient.

The MSP430x1xx is equipped with various integrated peripherals, including analog-to-digital converters (ADCs), timers, and communication interfaces like UART, SPI, and I2C. The inclusion of a powerful ADC enables the microcontroller to handle sensor readings with high accuracy, making it suitable for applications like environmental monitoring and medical devices. The integrated timers provide essential functionality for real-time applications, allowing for event-driven programming and precise timing control.

Memory options in the MSP430x1xx series are also robust, with configurations offering flash memory sizes from 1 KB to 64 KB. This flexibility allows developers to choose the optimal memory size for their specific applications, accommodating a wide range of requirements.

Additionally, the MSP430x1xx microcontrollers are designed with a wide operating voltage range, typically from 1.8V to 3.6V, making them compatible with various power sources and further enhancing their usability in diverse applications.

In summary, the Texas Instruments MSP430x1xx series of microcontrollers is an excellent choice for developers seeking low-power, high-performance solutions for embedded applications. With an efficient architecture, a rich set of peripherals, and flexible memory options, these microcontrollers are positioned to meet the growing demands of modern electronic designs, particularly in battery-powered and energy-sensitive applications.

Texas Instruments MSP430x1xx manual FCTL1, Flash Memory Control Register, Reserved, Erase Cycle

Models: MSP430x1xx