Overview
The Texas Instruments MSP430F235 is a member of the MSP430 family of ultra-low power microcontrollers. This device is designed to optimize power consumption and extend battery life in portable measurement applications. It features a powerful 16-bit RISC CPU, 16-bit registers, and constant generators that contribute to maximum code efficiency. The MSP430F235 is part of a series that includes various configurations with different sets of peripherals, making it versatile for different applications.
Key Specifications
| Parameter | Specification |
|---|---|
| Package | 64-Pin LQFP (PM) |
| Operating Temperature Range | -40°C to 105°C |
| Flash Memory | 16KB + 256B |
| SRAM | 2KB |
| Supply Voltage Range | 1.8 V to 3.6 V |
| Active Mode Power Consumption | 270 µA at 1 MHz, 2.2 V |
| Standby Mode (VLO) Power Consumption | 0.3 µA |
| Off Mode (RAM Retention) Power Consumption | 0.1 µA |
| Clock Module Configurations | Internal frequencies up to 16 MHz, Internal Very Low-Power LF Oscillator, 32-kHz Crystal, External Digital Clock Source, External Resistor |
| Analog-to-Digital Converter (ADC) | 12-Bit ADC with internal reference, sample-and-hold, and autoscan feature |
| Timers | 16-Bit Timer_A with three capture/compare registers, 16-Bit Timer_B with seven capture/compare registers with shadow registers |
| Universal Serial Communication Interfaces (USCI) | Four USCI modules: USCI_A0 and USCI_A1 (UART, IrDA, SPI), USCI_B0 and USCI_B1 (SPI, I2C) |
Key Features
- Low Supply-Voltage Range: 1.8 V to 3.6 V
- Ultra-Low Power Consumption: Active Mode: 270 µA at 1 MHz, 2.2 V; Standby Mode (VLO): 0.3 µA; Off Mode (RAM Retention): 0.1 µA
- Ultra-Fast Wake-Up From Standby Mode in Less Than 1 µs
- 16-Bit RISC Architecture, 62.5-ns Instruction Cycle Time
- Basic Clock Module Configurations: Internal frequencies up to 16 MHz, Internal Very Low-Power LF Oscillator, 32-kHz Crystal, External Digital Clock Source, External Resistor
- 12-Bit Analog-to-Digital (A/D) Converter With Internal Reference, Sample-and-Hold, and Autoscan Feature
- 16-Bit Timer_A With Three Capture/Compare Registers
- 16-Bit Timer_B With Seven Capture/Compare Registers With Shadow Registers
- Four Universal Serial Communication Interfaces (USCI): USCI_A0 and USCI_A1 (UART, IrDA, SPI), USCI_B0 and USCI_B1 (SPI, I2C)
- On-Chip Comparator
- Supply Voltage Supervisor/Monitor With Programmable Level Detection
- Brownout Detector
- Bootstrap Loader
- Serial Onboard Programming, No External Programming Voltage Needed, Programmable Code Protection by Security Fuse
Applications
The MSP430F235 is typically used in various applications that require low power consumption and high efficiency. These include:
- Sensor systems: Due to its low power consumption and robust peripheral set, it is ideal for sensor-based applications.
- Industrial control applications: The device's ability to handle multiple tasks with low power makes it suitable for industrial control systems.
- Hand-held meters: Its ultra-low power modes and efficient architecture make it a good choice for battery-powered handheld devices.
Q & A
- What is the operating temperature range of the MSP430F235?
The operating temperature range is -40°C to 105°C.
- What is the flash memory capacity of the MSP430F235?
The MSP430F235 has 16KB of flash memory plus an additional 256B.
- What are the power consumption levels in different modes?
Active Mode: 270 µA at 1 MHz, 2.2 V; Standby Mode (VLO): 0.3 µA; Off Mode (RAM Retention): 0.1 µA.
- What types of timers are available on the MSP430F235?
The device features a 16-Bit Timer_A with three capture/compare registers and a 16-Bit Timer_B with seven capture/compare registers with shadow registers.
- What are the available serial communication interfaces?
Four Universal Serial Communication Interfaces (USCI): USCI_A0 and USCI_A1 (UART, IrDA, SPI), USCI_B0 and USCI_B1 (SPI, I2C).
- Does the MSP430F235 have an on-chip comparator?
- What is the supply voltage range for the MSP430F235?
The supply voltage range is from 1.8 V to 3.6 V.
- How fast can the MSP430F235 wake up from standby mode?
The device can wake up from standby mode in less than 1 µs.
- Does the MSP430F235 support serial onboard programming?
- What are some typical applications for the MSP430F235?
Typical applications include sensor systems, industrial control applications, and hand-held meters.
