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MSP430F2619 Folha de dados(PDF) 68 Page - Texas Instruments

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Nome de Peças MSP430F2619
Descrição Electrónicos  MSP430F261x, MSP430F241x Mixed-Signal Microcontrollers
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Fabricante Electrônico  TI1 [Texas Instruments]
Página de início  http://www.ti.com
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MSP430F2619 Folha de dados(HTML) 68 Page - Texas Instruments

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MSP430F2619, MSP430F2618, MSP430F2617, MSP430F2616
MSP430F2419, MSP430F2418, MSP430F2417, MSP430F2416
SLAS541L – JUNE 2007 – REVISED MAY 2020
www.ti.com
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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


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