SPRS902K October 2014 – February 2024 TMS320F28075 , TMS320F28075-Q1 , TMS320F28076
PRODUCTION DATA
Refer to the PDF data sheet for device specific package drawings
MODULE | FEATURE | SYSTEM BENEFIT |
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C28x PROCESSING | ||
Real-time control CPUs |
Up to 240 MIPS One C28x core: 120 MIPS (1 x 120 MIPS) Two CLA cores: 120 MIPS (1 x 120 MIPS) Flash: Up to 512 KB RAM : Up to 100 KB 64-bit Floating Point Unit (FPU64) Trigonometric Math Unit (TMU) CRC engine and instructions (VCRC) |
TI’s 32-bit C28x DSP cores, provides 120 MHz of signal-processing performance for floating- or fixed-point code running from either on-chip flash or SRAM Provides 120 MHz of signal-processing performance for floating- or fixed-point code running from either on-chip flash or SRAM. CLA: Allows user to execute time-critical control loops concurrently with main CPUFPU64: Native hardware support for IEEE-754 double-precision floating-point operations TMU: Accelerators used to speed up execution of trigonometric and arithmetic operations for faster computation (such as PLL and DQ transform) optimized for control applications. Helps in achieving faster control loops, resulting in higher efficiency and better component sizing. Special instructions to support nonlinear PID control algorithms VCRC: Provides a straightforward method for verifying data integrity over large data blocks, communication packets, or code sections. See Real-time Benchmarks Showcasing C2000™ControlMCU's Optimized Signal Chain. |
SENSING | ||
Analog-to-Digital Converter (ADC) (configurable 12-bit or 16-bit) |
Three ADC modules 12-bit mode: (3.5 MSPS) Single-ended mode: Up to 17 channels |
ADC provides precise and concurrent sampling of all three-phase currents and DC bus with zero jitter. ADC post-processing – On-chip hardware reduces ADC ISR complexity and shortens current loop cycles. More ADCs help in multiphase applications. Provide better effective MSPS (oversampling) and typical ENOB for better control-loop performance. |
Comparator Subsystem (CMPSS) | CMPSS 8 windowed comparators Three 12-bit DACs 60-ns detection to trip time DAC ramp generation Low DAC output on external pin Digital filters Slope compensation |
System protection without false alarms: Comparator Subsystem (CMPSS) modules are useful for applications such as peak-current mode control, switched-mode power, power factor correction, and voltage trip monitoring. PWM trip-triggering and removal of unwanted noise are easy with blanking window and filtering features provided with the analog comparator subsystems. Provides better control accuracy. No need for further CPU configuration to control the PWM with the comparator and 12-bit DAC (CMPSS). Enables protection and control using the same pin. |
Sigma Delta Filter Module (SDFM) |
Up to 8 independently configurable digital comparator filter channels Up to 8 independently configurable digital data filter channels |
Enables galvanic isolation with reinforced delta sigma modulators. SDFMs interface with external delta sigma modulator ADCs, which is ideal for signals that may require isolation. Comparator filter supports overcurrent and undercurrent protection but tripping the PWM without CPU intervention Digital data filter provides higher ENOBs for better control-loop performance |
Enhanced Quadrature Encoder Pulse (eQEP) | 3 eQEP modules | Used for direct interface with a linear or rotary incremental encoder to get position, direction, and speed information from a rotating machine used in a high-performance motion and position-control system. Also can be used in other applications to count input pulses from an external device (such as a sensor). |
Enhanced Capture (eCAP) |
6 eCAP modules Measures elapsed time between events (up to 4 time-stamped events). Connects to any GPIO through the input X-BAR. When not used in capture mode, the eCAP module can be configured as a single-channel PWM output (APWM). |
Applications for eCAP include: Speed measurements of rotating machinery (for example, toothed sprockets sensed through Hall sensors) Elapsed time measurements between position sensor pulses Period and duty-cycle measurements of pulse train signals Decoding current or voltage amplitude derived from duty-cycle encoded current/voltage sensors |
ACTUATION | ||
Enhanced Pulse Width Modulation (ePWM)/High-Resolution Pulse Width Modulation (HRPWM) |
Up to 24 ePWM channels Ability to generate high-side/low-side PWMs with deadband Supports Valley switching (ability to switch PWM output at valley point) and features like blanking window |
Flexible PWM waveform generation with best power topology coverage. Shadowed Dead band itself and shadowed action qualifier enable adaptive PWM generation and protection for improved control accuracy and reduced power loss. Enables improvement in Power Factor (PF) and Total Harmonic Distortion (THD), which is especially relevant in Power Factor Correction (PFC) applications. Improves light load efficiency. |
HRPWM capability: 16 channels provide high-resolution capability (150 ps) Provides 150-ps steps for duty cycle, period, deadband, and phase offsets for 99% greater precision |
Beneficial for accurate control and enables better-performance high-frequency power conversion. Achieves cleaner waveforms and avoids oscillations/limit cycle at output. |
|
One-shot and global reload feature |
Critical for variable-frequency and multiphase DC-DC applications and helps in attaining high-frequency control loops (>2 MHz). Enables control of interleaved LLC topologies at high frequencies |
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Independent PWM action on a Cycle-by-Cycle (CBC) trip event and an One-Shot Trip (OST) trip event |
Provides cycle-by-cycle protection and complete shutoff of PWM under fault condition. Helps implement multiphase PFC or DC-DC control. | |
Load on SYNC (support for shadow-to-active load on a SYNC event) | Enables variable-frequency applications (allows LLC control in power conversion). | |
Ability to shut down the PWMs without software intervention (no ISR latency) | Fast protection under fault condition | |
Delayed Trip Functionality | Helps implement the deadband with Peak Current Mode Control (PCMC) Phase-Shifted Full Bride (PSFB) DC-DC easily without occupying much CPU resources (even on trigger events based on comparator, trip, or sync-in events). | |
Dead band Generator (DB) submodule | Prevents simultaneous ON conditions of High- and Low-side gates by adding programmable delay to rising (RED) and falling (FED) PWM signal edges. | |
Flexible PWM Phase Relationships and Timer Synchronization | Each ePWM module can be synchronized
with other ePWM modules or other peripherals. Keeps PWM edges perfectly
in synchronization with certain events. Supports flexible ADC scheduling with specific sampling window in synchronization with power device switching. |
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CONNECTIVITY | ||
Serial Peripheral Interface (SPI) | 3 high-speed SPI port | Supports 50 MHz |
Serial Communication Interface (SCI) | 4 SCI (UART) modules | Interfaces with controllers |
Controller Area Network (CAN/DCAN) | 2 DCAN module (can be assigned to Connectivity Manager (M4)) |
Provides compatibility with classic CAN modules |
Inter-Integrated Circuit (I2C) | 2 I2C modules | Interfaces with external EEPROMs, sensors, or controllers |
Multichannel Buffered Serial Port (McBSP) | Up to 2 McBSP modules | Interface to high-speed external ADC or additional SPI peripheral |
External Memory Interfaces (EMIFs) with ASRAM and SDRAM support | One EMIF module | Interface with External ASRAM and SDRAM |
OTHER SYSTEM FEATURES | ||
Configurable Logic Block (CLB) |
Collection of configurable blocks that can be inter-connected using software to implement custom digital logic functions |
User customized PWM protection features, custom logic to off-load complex algorithms/state machines, custom peripherals, and used to implement absolute encoders used in servo drives User also used for protection of multilevel inverter/PFC or multilevel DC-DC Provides the ability to build logic around existing IPs like ETPWM, ECAP, QEP and GPIOs. Enables development of unique IP such as PWM Safety modules, Encoder engines, etc. |
Security enhancers |
Dual-zone Code Security Module (DCSM) Secure Boot JTAGLOCK BackGround CRC (BGCRC) Generic CRC (GCRC) Watchdog Write Protection on Register Missing Clock Detection Logic (MCD) Error Correction Code (ECC) and parity |
DCSM: Prevents duplication and reverse-engineering of proprietary code Secure Boot: Uses AES128 CMAC algorithm to ensure code that runs on the device is authentic JTAGLOCK: Ability to block emulation of the device BGCRC: Checks memory integrity with no CPU overhead or system performance impact GCRC: Designated Connectivity Manager module for computing the CRC value on a configurable block of memory Watchdog: Generates reset if CPU gets stuck in endless loops of execution Write Protection on Registers: LOCK protection on system configuration registers Protection against spurious CPU writes MCD: Automatic clock failure detection ECC and parity: Single-bit error correction and double-bit error detection |
Crossbars (XBARs) | Provides flexibility to connect device inputs, outputs, and internal resources in a variety of configurations. • Input X-BAR • Output X-BAR • ePWM X-BAR • CLB Input X-BAR • CLB Output X-BAR • CLB X-BAR |
Enhances hardware design versatility: Input X-BAR: Routes signals from any GPIO to multiple IP blocks within the chip Output XBAR: Routes internal signals onto designated GPIO pins ePWM X-BAR: Routes internal signals from various IP blocks to ePWM CLB Input X-BAR: Allows user to route signals directly from any GPIO to Configurable Logic Block (CLB) CLB Output X-BAR: Allows user to bring signals from CLB tiles to designated GPIO pins CLB X-BAR: Allows user to bring signals from various IP blocks to CLB |
Direct Memory Access (DMA) controller | 6-channels | The direct memory access (DMA) module provides a hardware method of transferring data between peripherals and/or memory without intervention from the CPU, thereby freeing up CPU bandwidth for other system functions. |
USB | Useful for system datalogging and boot to USB for updating on-chip flash |