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V62/13624-01XE-R 数据表(PDF) 12 Page - Texas Instruments |
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V62/13624-01XE-R 数据表(HTML) 12 Page - Texas Instruments |
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12 / 77 page  12 MSP430F2132-EP SLAS913A – JULY 2013 – REVISED AUGUST 2013 www.ti.com Product Folder Links: MSP430F2132-EP Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated 4.9 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 MSP430x2xx Family User's Guide (SLAU144). 4.10 Oscillator and System Clock The clock system 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 turn-on clock source and stabilizes in less than 1 µs. The basic clock module provides the following clock signals: • Auxiliary clock (ACLK), sourced from a 32768-Hz watch crystal, a high-frequency crystal, or the internal very- low-power LF oscillator. • Main clock (MCLK), the system clock used by the CPU. • Sub-Main clock (SMCLK), the sub-system clock used by the peripheral modules. The DCO settings to calibrate the DCO output frequency are stored in the information memory segment A. 4.11 Calibration Data Stored in Information Memory Segment A Calibration data is stored for both the DCO and for ADC10 organized in a tag-length-value (TLV) structure. Table 10. Tags Used By the ADC Calibration Tags NAME ADDRESS VALUE DESCRIPTION TAG_DCO_30 0x10F6 0x01 DCO frequency calibration at VCC = 3 V and TA = 30°C at calibration TAG_ADC10_1 0x10DA 0x08 ADC10_1 calibration tag TAG_EMPTY - 0xFE Identifier for empty memory areas Table 11. Labels Used By the ADC Calibration Tags LABEL CONDITION AT CALIBRATION / DESCRIPTION SIZE ADDRESS OFFSET CAL_ADC_25T85 INCHx = 0x1010, REF2_5 = 1, TA = 85°C word 0x0010 CAL_ADC_25T30 INCHx = 0x1010, REF2_5 = 1, TA = 30°C word 0x000E CAL_ADC_25VREF_FACTOR REF2_5 = 1, TA = 30°C, IVREF+ = 1 mA word 0x000C CAL_ADC_15T85 INCHx = 0x1010, REF2_5 = 0, TA = 85°C word 0x000A CAL_ADC_15T30 INCHx = 0x1010, REF2_5 = 0, TA = 30°C word 0x0008 CAL_ADC_15VREF_FACTOR REF2_5 = 0, TA = 30°C, IVREF+ = 0.5 mA word 0x0006 CAL_ADC_OFFSET External VREF = 1.5 V, fADC10CLK = 5 MHz word 0x0004 CAL_ADC_GAIN_FACTOR External VREF = 1.5 V, fADC10CLK = 5 MHz word 0x0002 CAL_BC1_1MHz - byte 0x0009 CAL_DCO_1MHz - byte 0x0008 CAL_BC1_8MHz - byte 0x0007 CAL_DCO_8MHz - byte 0x0006 CAL_BC1_12MHz - byte 0x0005 CAL_DCO_12MHz - byte 0x0004 CAL_BC1_16MHz - byte 0x0003 CAL_DCO_16MHz - byte 0x0002 |
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