TMDSCNCD28379D

CONTROLCARD TMS320F28379D EVAL

ABSTRACT

The Delfino F28379D controlCARD (TMDSCNCD28379D) from Texas Instruments (TI) provides a great way to learn and experiment with the F2837x device family within TI’s C2000™ family of microcontrollers (MCUs). This 180-pin controlCARD is intended to provide a well-filtered robust design that is capable of working in most environments. This document provides the hardware details of the F28379D controlCARD and explains the functions, locations of jumpers, and connectors present on the board.

1 Introduction

As of January 2016, all kits based on the F28377D MCU will now be replaced with the new F28379D superset device. These two MCUs are identical except for the addition of the CLB on the F28379D MCU to enable Position Manager. If the CLB is not a requirement in your application, that feature can be left untouched and the MCU will perform like the F28377D.

Each controlCARD comes with a Hardware Developer’s Kit, a full set of files necessary to evaluate and develop with a C2000 device. These files include:

• Schematics – Designed in Mentor PADS Logic

• Bill of Materials (BOM)

• Layout PCB files - Designed in Mentor layout

• Gerber files

The Hardware Developer's Kit for the controlCARD can be found in the C2000Ware at the following location: • \c2000\C2000Ware_x_xx_xx_xx\boards\controlCARDs\TMDSCNCD28379D\Rx_x

2 Errata

Current revision of controlCARD as of 2-Oct-2015: PCB rev - R1.3, ASSY rev - B.

The Letter B on the controlCARD's Serial Number sticker denotes ASSY rev – B

2.1 Warnings/Notes/Errata

Notes for all controlCARDs:

• The F28379D controlCARD supports USB host/device connectivity. However, the micro-USB port, J8, is not isolated from the board ground. Care should be taken when this controlCARD is being used in a high-power application and this USB port is also being used. Note that external USB isolation buffers may be required for these types of applications.

• The F28379D Experimenter’s Kit ships with a USB cable and is designed to be powered via USB. However, in extreme cases the board/controlCARD may require more power than the 5V @ 500mA a computer’s USB port can provide (<0.01% of use cases). This is especially true when additional circuitry has been added to the docking station.

In such cases, it is recommended to use an external 5V power supply (2.5 mm inner diameter x 5.5 mm outer diameter) and plug it into J1. A compatible supply could be the: Phihong PSAC05R-050(P)-R-C2 + Phihong RPBAG.

• In Boot-from-SCI mode the MCU will, by default, expect GPIO84 and GPIO85 to be the IO pins responsible for sending the program to the device. These GPIOs are different from the GPIOs that connect to the isolated USB-to-serial interface via the FTDI chip, which uses GPIO28 and GPIO29. To use GPIO28 and 29 instead:

– Change the boot mode to Get Mode and then, in your main flashed code, you can decide to call the bootloader for SCIBoot IOOption2 (in the bootROM) always, or based on whatever is desired.

– Change the boot mode to Get Mode and configure the OTP such that SCIBoot IOOption2 is called. This is really only an option if you always want to boot from SCI or Parallel GPIO, because you will be overwriting your ability to boot from Flash.

– With an emulator connected (TRSTn = 1), registers can be set such that SCIBoot’s IOOption2 boot mode is called.

For more information, see the device-specific TRM.

• R83 on the controlCARD is populated to allow a customer to evaluate the controlCARD without a baseboard if desired. Because R83 is populated, the controlCARD putd more capacitance on the USB 5V supply than the USB specification allows. R83 should be removed in order to meet the specification.

2.2 Warnings About Specific controlCARD Revisions

Warnings about R1.0a revision F28377D controlCARDs:

• Among many other changes made, the pinout of the R1.1 F28377D controlCARD is different from the pinout of the pre-release R1.0a controlCARDs. When porting code, see the kit documentation and schematics in the C2000Ware install on your computer in the /boards/controlCARDs subdirectory.

Warnings about R1.1 and earlier F28377D controlCARDs:

• The F28377D MCU is not 5 V tolerant. Because of this, some additional protection is needed between the USB port J8 and the MCU. In particular, resistor R72 should change from 0R0 to 100K and resistor R74 should change from 0R0 to 10K. This effectively limits the voltage/current received by the MCU pin. This issue was fixed in R1.1a and later revision controlCARDs.

• If used, the crystal X1 should be acceptable in most applications. However, it can fail under some worst case conditions. To assure proper operation, see the TMS320F2837xD Real-Time Dual-Core MCUs Silicon Errata. This issue was fixed in R1.1a and later revision controlCARDs.

• Several name changes were made to pins on the device and are now reflected in R1.1a controlCARD documentation. No functionality was affected.

Warnings about R1.1a and earlier F28377D controlCARDs：

• The circuitry used to drive the C2000 MCU’s voltage references is not ideal. Instead, it is recommended that users use the voltage reference driving circuitry found in the R1.3 controlCARD.

Warnings about R1.3 of F28379D controlCARD:

• R51-R54 were mistakenly populated with 100 MΩ resistors instead of 100 mΩ resistors. With 100 MΩ resistors used, the voltage references for the analog-to-digital converters (ADCs) may not be held adequately constant and the accuracy/precision of ADC results may be affected during sampling/conversion. It is recommended that customers replace R51-R54 with 100 mΩ, 0603, 5% tolerance (or better) resistors. For evaluation of the controlCARD in a lab environment, it is also acceptable to short R51-R54 using 0 Ω resistors or solder bridges, however, populating with 100 mΩ is preferred. For more information, see the following E2E post: https://e2e.ti.com/support/microcontrollers/c2000/f/171/t/576301

3 Getting Familiar With the controlCARD

3.1 F28379D controlCARD Features

• Delfino F28379D Microcontroller – High performance C2000 microcontroller is located on the controlCARD.

• 180-pin HSEC8 Edge Card Interface – Allows for compatibility with all of C2000’s 180-pin controlCARDbased application kits and controlCARDs. Compatibility with 100-pin controlCARDs can be accomplished using the TMDSADAP180TO100 adapter card (sold separately).

• Built-in Isolated JTAG Emulation – An xds100v2 emulator provides a convenient interface to Code Composer Studio™ without additional hardware. Flipping a switch allows an external JTAG emulator to be used.

• Connectivity – The controlCARD contains connectors that allow the user to experiment with USB, a microSD card, and isolated UART/SCI with the F28379D MCU. A hi-density connector is also provided to experiment with external memory.

• Key Signal Breakout – Most GPIO, ADC and other key signals routed to hard gold connector fingers

• Robust Power Supply Filtering – Single 5 V input supply powers an on-CARD 3.3 V LDO. All MCU inputs are then decoupled using LC filters near the device.

• ADC Clamping – ADC inputs are clamped by protection diodes.

• Anti-Aliasing Filters – Noise filters (small RC filters) can be easily added on several ADC input pins.

3.2 Assumed Operating Conditions

This kit is assumed to run at standard room conditions. The EVM should run at approximately standard ambient temperature and pressure (SATP) with moderate-to-low humidity.

3.3 Using the controlCARD

In order for the controlCARD to work, the controlCARD’s MCU must be powered. This is most often done by inputting 5 V through the HSEC connector via an accompanying baseboard. For example, if using a TMDSHSECDOCK docking station baseboard, 5VDC should be input into the docking station’s J1 or J17. Then, S1 needs to be toggled to the appropriate position.

Optionally, the MCU could also be powered via the micro-USB connector on the controlCARD.

Based on the way the controlCARD will be used, additional hardware settings are necessary