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MSP430F2619 Folha de dados(PDF) 68 Page - Texas Instruments |
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MSP430F2619 Folha de dados(HTML) 68 Page - Texas Instruments |
68 / 120 page 68 MSP430F2619, MSP430F2618, MSP430F2617, MSP430F2616 MSP430F2419, MSP430F2418, MSP430F2417, MSP430F2416 SLAS541L – JUNE 2007 – REVISED MAY 2020 www.ti.com Submit Documentation Feedback Product Folder Links: MSP430F2619 MSP430F2618 MSP430F2617 MSP430F2616 MSP430F2419 MSP430F2418 MSP430F2417 MSP430F2416 Detailed Description Copyright © 2007–2020, Texas Instruments Incorporated 6.9 Peripherals Peripherals are connected to the CPU through data, address, and control buses and can be handled using all instructions. For complete module descriptions, see the MSP430F2xx, MSP430G2xx Family User's Guide. 6.9.1 DMA Controller (MSP430F261x Only) The DMA controller allows movement of data from one memory address to another without CPU intervention. For example, the DMA controller can be used to move data from the ADC12 conversion memory to RAM. Using the DMA controller can increase the throughput of peripheral modules. The DMA controller reduces system power consumption by allowing the CPU to remain in sleep mode without having to awaken to move data to or from a peripheral. 6.9.2 Oscillator and System Clock The clock system in the MSP430F241x and MSP430F261x family of devices is supported by the basic clock module that includes support for a 32768-Hz watch crystal oscillator, an internal very low-power low- frequency oscillator, an internal digitally controlled oscillator (DCO), and a high-frequency crystal oscillator. The basic clock module is designed to meet the requirements of both low system cost and low power consumption. The internal DCO provides a fast turnon clock source and stabilizes in less than 1 µs. The basic clock module provides the following clock signals: • Auxiliary clock (ACLK), sourced either from a 32768-Hz watch crystal or the internal LF oscillator. • Main clock (MCLK), the system clock used by the CPU. • Sub-Main clock (SMCLK), the subsystem clock used by the peripheral modules. The DCO settings to calibrate the DCO output frequency are stored in the information memory segment A. 6.9.3 Calibration Data Stored in Information Memory Segment A Calibration data is stored for the DCO and for the ADC12. It is organized in a tag-length-value (TLV) structure (see Table 6-10 and Table 6-11). Table 6-10. Tags Used by the TLV Structure NAME ADDRESS VALUE DESCRIPTION TAG_DCO_30 0x10F6 0x01 DCO frequency calibration at VCC = 3 V and TA = 25°C TAG_ADC12_1 0x10DA 0x08 ADC12_1 calibration tag TAG_EMPTY – 0xFE Identifier for empty memory areas |
Nº de peça semelhante - MSP430F2619 |
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Descrição semelhante - MSP430F2619 |
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