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  [组图]TI MSP430F522x系列MCU蓝牙和音频源参考设计           ★★★ 【字体:
TI MSP430F522x系列MCU蓝牙和音频源参考设计
作者:TI    文章来源:TI    点击数:    更新时间:2015-3-12    
TI公司的Delfino TMS320F28377D是双核32位浮点微控制器单元(MCU),支持新的双核C28x架构,大大地提升了系统性能.每核提供200MHz的信号处理性能,集成了512KB或1MB闪存,172KB或204KB RAM,主要用在工业驱动,智能计量,太阳能微逆变器和转换器,汽车运输雷达动力线通信,数字电源和软件定义无线电.本文介绍了TMS320F28377D主要特性,框图和模拟子系统框图以及基于ΔΣ ADC和MCU的数据采集系统主要特性,完整框图,电路图和材料清单以及PCB元件布局图.

The Delfino TMS320F2837xD is a powerful 32-bit floating-point microcontroller unit (MCU) that lets designers consolidate control architectures and eliminate multiprocessor use in high-end systems. While the Delfino product line is not new to the TMS320C2000 portfolio, the dual-core F2837xD supports a new dual-core C28x architecture that significantly boosts system performance while further providing consolidation through integrated analog and control peripherals.

The dual real-time control subsystems are based on TI’s 32-bit C28x floating-point CPUs, which provide 200 MHz of signal processing performance in each core. The C28x CPUs are further boosted by the new TMU accelerator, which enables fast execution of algorithms with trigonometric operations common in transforms and torque loop calculations; and the VCU accelerator, which reduces the latency for complex math operations common in encoded applications.

The F2837xD features two real-time control accelerators, also known as Control Law Accelerators (CLAs). The CLA provides an additional floating-point accelerator used to run parallel time-critical control algorithms, providing bandwidth for the C28x to focus on system tasks. The dual C28x + CLA architecture also provides intelligent partitioning of system-critical tasks and allows simultaneous management of these tasks, such as tracking speed and position in one core while managing control-side algorithms to calculate torque loops in the other CPU + CLA.

The TMS320F2837xD supports up to 1MB of onboard flash memory with error correction code (ECC) and up to 204KB of SRAM. Two 128-bit secure zones are also available on each CPU for code protection.

Performance analog and control peripherals are also integrated on the F2837xD MCU to further enable system consolidation. Four independent 16-bit ADCs provide precise and efficient management of multiple analog signals, which ultimately boosts system throughput. New sigma-delta peripherals enable isolated current shunt measurements and windowed comparators allow protection of power stage when current limit conditions are exceeded or not met. Other analog and control peripherals include digital-to-analog converters (DACs), PWMs, eCAPs, eQEPs, and other peripherals.

Peripherals such as dual EMIFs and dual ISO11898-1 (CAN 2.0B) extend the connectivity of the F2837xD. A USB 2.0 host port with MAC and PHY lets users easily add universal serial bus (USB) connectivity to their application.

TMS320F28377D主要特性:
Dual-Core Architecture
Two TMS320C28x 32-Bit CPUs
200 MHz
IEEE 754 Single-Precision Floating-Point
Trigonometric Math Unit (TMU)
Viterbi/Complex Math Unit (VCU-II)
Two Programmable Control Law Accelerators
200 MHz
IEEE 754 Single-Precision Floating-Point Executes Code Independently of Main CPU
On-Chip Memory
512KB or 1MB of Flash (ECC-Protected)
172KB or 204KB of RAM (ECC or Parity)
Dual-Zone Security Supporting Third-Party Development
Clock and System Control
Two Internal Zero-Pin 10-MHz Oscillators
On-Chip Crystal Oscillator and External Clock Input
Windowed Watchdog Timer Module
Missing Clock Detection Circuitry
1.2-V Core, 3.3-V I/O Design
System Peripherals
Two External Memory Interfaces (EMIFs) With ASRAM and SDRAM Support
Dual 6-Channel Direct Memory Access (DMA) Controller
Up to 169 Individually Programmable, Multiplexed General-Purpose Input/Output (GPIO) Pins With Input Filtering
HW Interrupt Controller
Multiple Low-Power Mode Support With External Wakeup
JTAG Emulation Connection
Communications Peripherals
USB 2.0 (MAC + PHY)
Two CAN-Bus Ports (Pin-Bootable)
Three High-Speed (40-MHz) SPI Ports
(Pin-Bootable)
Two Multichannel Buffered Serial Ports
Four Serial Communications Interfaces (SCIs) (Pin-Bootable)
Two I2C Interfaces (Pin-Bootable)
Analog Subsystem
Four Dual-Mode Analog-to-Digital Converters (ADCs)
16-Bit Mode
1.1 MSPS Each (up to 4.4-MSPS System)
Differential
Up to 12 External Channels
12-Bit Mode
3.5 MSPS Each (up to 14-MSPS System)
Single-Ended
Up to 24 External Channels
Single Sample-and-Hold (S/H) on Each ADC
HW Integrated Post-Processing of ADC Conversions
Saturating Offset Calibration
Error From Setpoint Calculation
High, Low, and Zero-Crossing Compare, With Interrupt Capability
Trigger-to-Sample Delay Capture
Eight Windowed Comparators With 12-Bit DAC References
Three 12-Bit Buffered DAC Outputs
Enhanced Control Peripherals
24 Pulse Width Modulator (PWM) Channels With Enhanced Features
16 High-Resolution Pulse Width Modulator (HRPWM) Channels
High Resolution on Both A and B Channels of 8 PWM Modules
Dead-Band Support (on Both Standard and High Resolution)
Six Enhanced Capture (eCAP) Modules
Three Enhanced Quadrature Encoder Pulse (eQEP) Modules
8 Sigma-Delta Filter Module (SDFM) Input Channels, 2 Parallel Filters per Channel
Standard SDFM Data Filtering
Comparator Filter for Fast Action for Out of Range
Package Options:
Lead-Free, Green Packaging
337-Ball New Fine Pitch Ball Grid Array (nFBGA) [ZWT Suffix]
176-Pin PowerPAD Thermally Enhanced Low-Profile Quad Flatpack (HLQFP) [PTP Suffix]
Temperature Options:
T: –40ºC to 105ºC Junction
S: –40ºC to 125ºC Junction
Q: –40ºC to 125ºC Free-Air
(Q100 Qualification for Automotive Applications)
TMS320F28377D应用:
• Industrial Drives
• Smart Metering
• Solar Micro Inverters and Converters
• Automotive Transportation
• Radar
• Power Line Communications
• Digital Power
• Software-Defined Radio

图1. TMS320F28377D框图

图2. TMS320F28377D模拟子系统框图

基于ΔΣ ADC和MCU的数据采集系统

This isolated data acquisition system based on an isolated delta-sigma (ΔΣ) modulator and a microcontroller can accurately measure currents in the -10 A to 10 A range when used with the appropriate current shunts. This circuit was designed to provide excellent galvanic isolation and accuracy targeted primarily for a current sensing application. The design provides dual functionality for a high resolution channel and an additional over-current or short-circuit detection channel.

The primary objective for this TI Precision Design is to create a isolated data acquisition system to meet the following specifications:

• Maximum current range in normal operation: 10 Apeak
• Uncalibrated accuracy (only for measurement of voltage drop across the shunt): 0.3% FSR
• Signal to noise ratio (SNR) at 1 kHz: 78dB
• Minimum sampling rate: 70 kSPS
• Minimum bandwidth: 20 kHz
• Supply level: 5 V

图3. 基于ΔΣ调制器和MCU的数据采集系统完整框图

图4.基于ΔΣ调制器的数据采集系统框图

This Verified TI Design implements an isolated current sensing data acqusition solution based on the AMC1304M25 isolated delta-sigma (ΔΣ) modulator and a TMS320F28377D microcontroller.  This circuit was designed for shunt-based current measurement applications which require excellent galvanic isolation and accuracy, such as industrial motor drives, photovoltaic inverters, and energy metering.  It is capable of measuring load currents from -10 A to +10 A with better than 0.3% uncalibrated accuracy, and it also provides dual functionality of a high resolution channel and an additional over-current or short-circuit detection channel.  The design’s functionality and performance were verified against the circuit design goals by fabricating three PCBs and measuring results for dc and ac input signals.

数据采集系统主要特性:
Verified Design contains theory, component selection, TINA-TI simulation, measured results, PCB layout, and modifications
Galvanically isolated current sensing solution
16-bit output at 78.1 kSPS
±10 A at <0.3% (uncalibrated accuracy)
78dB SNR (min)
TIPD165 - Isolated, Shunt-Based Current Sensing Reference Design
图5.TIPD165-隔离的分流检测参考设计外形图

图6.TMS320F28377D控制卡PCB布局图

图7.AMC1304 PCB布局图

图8.坞站PCB布局图

图9. AMC1304M25卡电路图
AMC1304M25卡材料清单:


图10.坞站电路图(1)

图11.坞站电路图(2)
坞站材料清单:

详情请见:
http://www.ti.com/lit/ds/symlink/tms320f28377d.pdf
http://www.ti.com/lit/ug/tidu384a/tidu384a.pdf
以及http://www.ti.com/lit/df/tidrbr9/tidrbr9.pdf
http://www.ti.com/lit/df/tidrbr8/tidrbr8.pdf

tidrbr8.pdf
tidrbr9.pdf
tms320f28377d.pdf
tidu384a.pdf
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