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Texas Instruments manual Circuit Descriptions, 1 MSC1211, Programming and Host Communication

Models: MSC1211

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Circuit Descriptions

3.4 Circuit Descriptions

The MSC1211EVM combines the MSC1211 microcontroller, 128K RAM, the ADS8325, 256K EEPROM, a 22.1184MHz crystal, support for two serial ports, and other support circuits to aid in the evaluation of the MSC1211.

3.4.1MSC1211

The MSC1211 (U5) is clocked by the 22.1184MHz crystal oscillator, unless it is disabled with switch SW3–6. When the oscillator is disabled, the MSC1211 can use crystal X1 to provide the clock source using on–chip circuitry, although oscillator X2 must be removed from the board for reliable crystal operation. In- puts come from J4 through current-limiting resistors R1–R9.

Programs can be loaded into the 32K bytes of flash memory using the serial port (Serial0). The MSC1211 has 1,380 bytes of on–chip RAM. Extra RAM is available through the use of the 128K RAM (U9). 64K of RAM is directly ad- dressable, with P1.4 providing the means for bank switching.

For detailed information about the MSC1211, consult the MSC1211 product datasheet (SBAS267) located at www.ti.com.

3.4.2Programming and Host Communication

The Raisonance integrated software environment (RIDE) and the TI Down- loader program make for a convenient system of program development, download, and execution.

Full source code for the MSC1211EVM firmware is included on the CD-ROM.

3.4.3Power Supply

Power is brought into the board through external power connectors JMP5 (pins 2 and 3) and JMP6 (pins 2 and 3), battery connector B1, or unregulated power input J6. If a wall power adaptor is plugged into J6, the battery is discon- nected.

Power supplied from the battery or through J6 is regulated by voltage regu- lators U3, and U4, which provide +5V digital and +5V analog supplies. Power supplied from the external connectors (JMP5 and JMP6) is not fil- tered; regulated power of the correct voltages must be supplied to these connectors.

The board is laid out with separate analog and digital power supplies. Ana- log power is 5V and is supplied from regulator U3, or external power con- nector JMP5. 5V digital power is supplied from regulator U4 or JMP6. When the external power connector J6 is used, it supplies regulator U3 and U4.

Operation 3-11

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Texas Instruments manual Circuit Descriptions, 1 MSC1211, Programming and Host Communication, Power Supply
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MSC1211 specifications

Texas Instruments MSC1211 is a highly integrated, low-power microcontroller designed specifically for applications requiring high accuracy and precision in signal processing. As a member of the Texas Instruments Microcontroller family, the MSC1211 targets industrial automation, medical instrumentation, and portable measurement devices, making it a versatile choice for designers across various industries.

One of the standout features of the MSC1211 is its 16-bit ADC (Analog-to-Digital Converter) that boasts a resolution of 16 bits, which enables the microcontroller to accurately convert analog signals into digital data. This high resolution makes it suitable for applications where precision is paramount, such as in medical devices that require accurate readings from sensors. The device can achieve sampling rates up to 1 kSPS (kilo Samples Per Second), making it efficient for real-time signal processing.

Another key characteristic of the MSC1211 is its low power consumption. The microcontroller employs advanced power management features, allowing it to operate in various power modes, making it ideal for battery-operated devices. The sleep mode dramatically reduces power consumption, extending the operational life of portable equipment significantly.

The MSC1211 features a built-in digital signal processor (DSP) that facilitates efficient data processing and filtering, enabling complex algorithms to be executed on the captured signals in real-time. This capability simplifies design considerations for developers, reducing the need for external DSP chips and enhancing system integration.

Connectivity is another significant aspect of the MSC1211. It supports standard communication protocols such as SPI (Serial Peripheral Interface) and I2C (Inter-Integrated Circuit), making it easy to interface with a variety of sensors and peripherals. This flexibility is crucial in today's interconnected world, allowing developers to design scalable systems that can accommodate future upgrades and enhancements.

Moreover, the microcontroller incorporates onboard memory, including RAM and Flash memory, ensuring ample storage for application codes and operational data. The flexibility in memory allocation allows developers to optimize their applications, balancing memory usage with processing speed.

In summary, the Texas Instruments MSC1211 microcontroller stands out for its high-resolution ADC, low power consumption, integrated DSP capabilities, and flexible communication options. These features make it an exceptional choice for applications in diverse fields such as medical devices, industrial automation, and portable measurement systems, ensuring precision and efficiency in performance.