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SM320F2812GHHMEP Folha de dados(PDF) 86 Page - Texas Instruments |
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SM320F2812GHHMEP Folha de dados(HTML) 86 Page - Texas Instruments |
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86 / 158 page  Development Support 86 March 2004 − Revised April 2010 SGUS051B TMS320C28x Enhanced Controller Area Network (eCAN) Reference Guide (literature number SPRU074) describes the eCAN that uses established protocol to communicate serially with other controllers in electrically noisy environments. With 32 fully configurable mailboxes and time-stamping feature, the eCAN module provides a versatile and robust serial communication interface. The eCAN module implemented in the C28x DSP is compatible with the CAN 2.0B standard (active). TMS320C28x Event Manager (EV) Reference Guide (literature number SPRU065) describes the EV modules that provide a broad range of functions and features that are particularly useful in motion control and motor control applications. The EV modules include general-purpose (GP) timers, full-compare/PWM units, capture units, and quadrature-encoder pulse (QEP) circuits. TMS320C28x External Interface (XINTF) Reference Guide (literature number SPRU067) describes the external interface (XINTF) of the 28x digital signal processors (DSPs). TMS320C28x Multichannel Buffered Serial Ports (McBSPs) Reference Guide (literature number SPRU061) describes the McBSP) available on the C28x devices. The McBSPs allow direct interface between a DSP and other devices in a system. TMS320C28x Serial Communication Interface (SCI) Reference Guide (literature number SPRU051) describes the SCI that is a two-wire asynchronous serial port, commonly known as a UART. The SCI modules support digital communications between the CPU and other asynchronous peripherals that use the standard non-return-to-zero (NRZ) format. TMS320C28x Serial Peripheral Interface (SPI) Reference Guide (literature number SPRU059) describes the SPI − a high-speed synchronous serial input/output (I/O) port that allows a serial bit stream of programmed length (one to sixteen bits) to be shifted into and out of the device at a programmed bit−transfer rate. The SPI is used for communications between the DSP controller and external peripherals or another controller. TMS320C28x System Control and Interrupts Reference Guide (literature number SPRU078) describes the various interrupts and system control features of the 28x digital signal processors (DSPs). 3.3 V DSP for Digital Motor Control Application Report (literature number SPRA550). New generations of motor control digital signal processors (DSPs) lower their supply voltages from 5 V to 3.3 V to offer higher performance at lower cost. Replacing traditional 5-V digital control circuitry by 3.3-V designs introduce no additional system cost and no significant complication in interfacing with TTL and CMOS compatible components, as well as with mixed voltage ICs such as power transistor gate drivers. Just like 5-V based designs, good engineering practice should be exercised to minimize noise and EMI effects by proper component layout and PCB design when 3.3-V DSP, ADC, and digital circuitry are used in a mixed signal environment, with high and low voltage analog and switching signals, such as a motor control system. In addition, software techniques such as Random PWM method can be used by special features of the Texas Instruments (TI) TMS320x24xx DSP controllers to significantly reduce noise effects caused by EMI radiation. This application report reviews designs of 3.3-V DSP versus 5-V DSP for low HP motor control applications. The application report first describes a scenario of a 3.3-V-only motor controller indicating that for most applications, no significant issue of interfacing between 3.3 V and 5 V exists. Cost-effective 3.3-V − 5-V interfacing techniques are then discussed for the situations where such interfacing is needed. On-chip 3.3-V ADC versus 5-V ADC is also discussed. Sensitivity and noise effects in 3.3-V and 5-V ADC conversions are addressed. Guidelines for component layout and printed circuit board (PCB) design that can reduce system’s noise and EMI effects are summarized in the last section. The TMS320C28x Instruction Set Simulator Technical Overview (literature number SPRU608) describes the simulator, available within the Code Composer Studio for TMS320C2000 IDE, that simulates the instruction set of the C28x core. TMS320C28x DSP/BIOS Application Programming Interface (API) Reference Guide (literature number SPRU625) describes development using DSP/BIOS. |
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