Texas Instruments TMDSCNCD2800157 Technical manual

User’s Guide
TMDSCNCD2800157 controlCARD Information Guide
ABSTRACT
The F2800157 controlCARD (TMDSCNCD2800157) from Texas Instruments (TI) provides a great way to learn
and experiment with the F280015x devices. The F280015x device is a member of TI’s C2000™ family of
microcontrollers (MCUs). This 120-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 F2800157
controlCARD and explains the functions, locations of jumpers, and connectors present on the board.
Table of Contents
1 Introduction.............................................................................................................................................................................2
2 Hardware Quick Setup Guide................................................................................................................................................ 3
2.1 Configuration 1: Standalone...............................................................................................................................................3
2.2 Configuration 2: External 5-V Supply................................................................................................................................. 3
3 Errata....................................................................................................................................................................................... 4
3.1 Warnings, Notes, and Errata..............................................................................................................................................4
3.2 Warnings About Specific controlCARD Revisions..............................................................................................................4
4 Getting Familiar with the controlCARD................................................................................................................................ 5
4.1 F2800157 controlCARD Features......................................................................................................................................5
4.2 Assumed Operating Conditions......................................................................................................................................... 5
4.3 Using the controlCARD...................................................................................................................................................... 5
4.4 Experimentation Software.................................................................................................................................................. 7
5 Special Notes.......................................................................................................................................................................... 7
5.1 XDS110 Emulator and SCI (UART) Connectivity...............................................................................................................7
5.2 Clocking Methodology........................................................................................................................................................7
5.3 Evaluation of the Analog-to-Digital Converters (ADCs)..................................................................................................... 8
6 Hardware References............................................................................................................................................................. 9
7 Revision History................................................................................................................................................................... 12
List of Figures
Figure 1-1. F2800157 controlCARD............................................................................................................................................ 2
Figure 5-1. Female SMA Connector............................................................................................................................................ 8
Figure 6-1. Key Components on the controlCARD - Front.......................................................................................................... 9
Figure 6-2. Key Components on the controlCARD - Back.........................................................................................................10
List of Tables
Table 3-1. MCU106A................................................................................................................................................................... 4
Table 3-2. MCU106E1................................................................................................................................................................. 4
Table 4-1. Emulator Switch Selections........................................................................................................................................ 6
Table 6-1. Hardware Connections............................................................................................................................................. 10
Table 6-2. S4, Bootmode Selection Table..................................................................................................................................12
Trademarks
C2000™ and Code Composer Studio™ are trademarks of Texas Instruments.
All trademarks are the property of their respective owners.
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1 Introduction
Figure 1-1. F2800157 controlCARD
Each controlCARD comes with a Hardware Developer’s Kit, which is a full set of files necessary to evaluate and
develop with a C2000 device. These files include:
• Schematics – Designed in Altium
• Bill of Materials (BOM)
• Layout PCB files - Designed in Altium
• Gerber files
The Hardware Developer's Kit for the controlCARD can be found in the C2000Ware at the following location:
- <install directory>\c2000\C2000Ware_x_xx_xx_xx\boards\controlCARDs\TMDSCNCD2800157\Rx_x
Note
This kit is designed to explore the functionality of the F280015x microcontroller. The controlCARD
can be treated as a good reference design and is not intended to be a complete customer design.
Full compliance to safety, EMI/EMC, and other regulations are left to the designer of the customer’s
system.
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2 Hardware Quick Setup Guide
The controlCARD can be completely powered and operated from the USB-C connector. In this stand-alone
mode the on-board isolated power supply will provide power to the F2800157 device; no additional hardware
is required. Optionally, an external 5 V supply can be provided to power the F2800157 device. For a detailed
explanation of the hardware configuration, see Section 4.3.
WARNING
When the controlCARD is used in a high-voltage setup, it is the user’s responsibility to confirm that
the voltages and isolation requirements are identified and understood prior to energizing the board
or simulation. When energized, the controlCARD or components connected to the controlCARD
cannot be touched. Furthermore, the capacitor C7:A must be removed to minimize the possibility of
leakage current flowing across the isolation barrier of the controlCARD.
2.1 Configuration 1: Standalone
1. Connect a USB-C cable to J1:A.
2. Connect the other end of the USB cable to a USB2.0/USB3.x port.
3. LED1:A and D3 on the controlCARD illuminate.
2.2 Configuration 2: External 5-V Supply
1. Insert the TMDSCNCD2800157 controlCARD into a TMDSHSECDOCK, or other compatible docking station.
2. Connect a USB cable to J17 on the TMDSHSECDOCK.
3. Flip S1 to the "USB-ON" position on the TMDSHSECDOCK. The controlCARD automatically switches to the
external 5-V supply.
4. LED1:A and D3 on the controlCARD illuminate.
Note
The TMDSCNCD2800157 controlCARD automatically switches to the external 5-V supply when
present. No additional configuration is required.
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3 Errata
3.1 Warnings, Notes, and Errata
External power supply is needed when power requirements exceed USB limits
The F2800157 evaluation kit ships with a USB cable and is designed to be powered using USB. However, in
extreme cases the board/controlCARD can require more power than the 5 V @ 500 mA (USB 3.0 - 900 mA)
that a computer’s USB port can provide. This is especially true when additional circuitry has been added to
the TMDSHSECDOCK. In such cases, it is recommended to use an external 5-V power supply (2.5 mm inner
diameter x 5.5 mm outer diameter) and plug the power supply into J1 on the TMDSHSECDOCK. A compatible
power supply is:
• CUI SMM6-5-K-P6 + SMI-US-5
5-V power supply instability can lead to device resets
The 5-V rail on the TMDSCNCD2800157 controlCARD can be powered from an on-board USB connector or
from a baseboard like the TMDSHSECDOCK. A switch device on the controlCARD automatically selects the 5-V
input power source for the controlCARD without the need for user configuration.
A loss of power or glitching on the baseboard 5-V power source can cause the automatic switch to disconnect
from both power sources for several milliseconds. This momentary loss of power can cause a brownout
condition on the MCU, triggering a device reset. To avoid this condition, make sure that the baseboard power
supply remains at 0 V or 5 V during code execution.
CAN boot mode requires use of on-board crystal
The TMDSCNCD2800157 controlCARD supports the use of the CAN boot mode. This boot mode can be
selected through switch S4. The CAN boot mode requires the use of an external crystal to clock the F2800157
device. Therefore, when using the CAN boot mode, the controlCARD must be configured to use the on-board
crystal Y1 by setting switch S3 accordingly. See Section 6 for more information on the S3 and S4 switches.
3.2 Warnings About Specific controlCARD Revisions
Table 3-1. MCU106A
Issue Description
5-V power supply instability can lead to device resets See Section 3.1 about power supply instability.
Table 3-2. MCU106E1
Issue Description
Incorrect label on TP1 TP1 is incorrectly labeled as 5V5 on the front side of the controlCARD PCB. TP1 corresponds to the
HSEC_5V0 rail on the board. TP1 can be labeled 5V0.
5-V power supply instability can
lead to device resets
See Section 3.1 about power supply instability.
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4 Getting Familiar with the controlCARD
4.1 F2800157 controlCARD Features
•F2800157 Microcontroller – High performance C2000 microcontroller is located on the controlCARD.
•120-pin HSEC8 Edge Card Interface – Allows for compatibility with all of C2000 180-pin controlCARD-
based 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 XDS110 emulator provides a convenient interface to Code
Composer Studio™ IDE without additional hardware. Flipping a switch allows an external JTAG emulator
to be used.
•Built-in Isolated Power Supply - Passes the 5-V supply from the USB-C connector through an isolation
barrier. Allows for the controlCARD to be completed powered and operated from the USB-C connector. The
F2800157 is fully isolated from the USB port.
•Automatic Power Supply Switch - The controlCARD automatically switches to external 5-V power when
present. No additional configuration is required.
•Connectivity – The controlCARD contains connectors that allow the user to experiment with isolated
universal asynchronous receiver/transmitter (UART)/SCI with the F280015x MCU.
•Key Signal Breakout – Most GPIO, analog-to-digital converter (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 ADC input pins.
4.2 Assumed Operating Conditions
This kit is assumed to run at standard room conditions. Standard ambient temperature and pressure (SATP) with
moderate-to-low humidity is assumed.
4.2.1 External Power Supply or Accessory Requirements
Nominal Output Voltage: 5 VDC
Maximum Output Current: 3 A
Efficiency Level V
Note
TI recommends using an external power supply or power accessory that complies with applicable
regional safety standards such as (by example) UL, CSA, VDE, CCC, PSE, and so on.
4.3 Using the controlCARD
For the controlCARD to operate, the controlCARD MCU must be powered. This is done through the USB-C
connector on the controlCARD or by inputting 5 V through the HSEC connector using the accompanying
baseboard. For example, if using a TMDSHSECDOCK docking station baseboard, 5 VDC can be input into the
docking station J1 or J17. Then, S1 needs to be toggled to the appropriate position.
Based on the way the controlCARD is used, additional hardware settings are necessary (see Table 4-1).
WARNING
When the controlCARD is used in a high-voltage setup, confirm that the voltages and isolation
requirements are identified and understood prior to energizing the board or simulation. When
energized, the controlCARD or components connected to the controlCARD cannot be touched.
Furthermore, the capacitor C7:A must be removed to minimize the possibility of leakage-current
flowing across the isolation barrier of the controlCARD.
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Table 4-1. Emulator Switch Selections
Switch
Debug using CCS IDE and the
on-card XDS110 Emulator
(2-pin cJTAG mode, default)
Debug using CCS IDE and an
External Emulator using the
Baseboard
Standalone (Boot from FLASH
or other Boot Mode)
S1:A Position 1: ON (left, default) to
connect the embedded XDS110
emulator to the MCU
Position 1: OFF (right) to
disconnect the embedded
XDS110 emulator from the MCU
Position 1: OFF (right) to
disconnect the embedded
XDS110 emulator from the MCU
Position 2: ON (left, default) to
connect the embedded XDS110
UART COM port to the MCU
GPIO28 and GPIO29 pins
Position 2: OFF (right) to
disconnect the MCU GPIO28 and
GPIO29 pins from the embedded
XDS110 UART COM port
Position 2: OFF (right) to
disconnect the MCU GPIO28 and
GPIO29 pins from the embedded
XDS110 UART COM port
S2:A DOWN (default) - Disconnects
GPIO35/TDI and GPIO37/TDO
from the embedded XDS110
emulator; 2-pin cJTAG mode
must be used
DOWN (default) - Disconnects
GPIO35/TDI and GPIO37/TDO
from the external emulator; 2-pin
cJTAG mode must be used
DOWN (default) - Disconnects
GPIO35/TDI and GPIO37/TDO
from the embedded XDS110
emulator
Alternatively this switch be set
to UP to connect the GPIO35
and GPIO37 to the embedded
XDS110 emulator and enable 4-
pin JTAG mode
Alternatively this switch be set to
UP to connect the GPIO35 and
GPIO37 to the external emulator
and enable 4-pin JTAG mode
S3 Up (default) - Enables
GPIO19/X1 and GPIO18/X2
connection to the on-board XTAL
(Y1).
Up (default) - Enables
GPIO19/X1 and GPIO18/X2
connection to the on-board XTAL
(Y1).
Up (default) - Enables
GPIO19/X1 and GPIO18/X2
connection to the on-board XTAL
(Y1).
Down - Disables GPIO19/X1
and GPIO18/X2 connection to
the on-board XTAL (Y1); on-chip
INTOSC must be used
Down - Disables GPIO19/X1
and GPIO18/X2 connection to
the on-board XTAL (Y1); on-chip
INTOSC must be used
Down - Disables GPIO19/X1
and GPIO18/X2 connection to
the on-board XTAL (Y1); on-chip
INTOSC must be used
Setup S3 as desired Setup S3 as desired Setup S3 as desired
S4 Setup S4 as desired Setup S4 as desired Set S4 as desired
Putting the C2000 device into
Wait Mode can reduce risk of
connectivity issues
Putting the C2000 device into
Wait Mode can reduce risk of
connectivity issues
J1:A Connect a USB-C cable between
J1:A and your computer
--- ---
In CCS, use this target
configuration: TMS320F2800157
device with an XDS110 emulator,
2-pin cJTAG mode (based on
S2:A default configuration)
Baseboard JTAG connector (J2
on Docking Station)
--- Connect an external emulator ---
In CCS IDE, use this target
configuration: TMS320F2800157
device with 2-pin cJTAG
mode (based on S2:A default
configuration)
Code Composer Studio™ is an Integrated Development Environment (IDE) used to debug and develop software
for the C2000 series of MCUs. CCS IDE can be downloaded from the following link:
http://www.ti.com/tool/ccstudio.
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Note
By default, the TMDSCNCD2800157 controlCARD is configured for 2-pin cJTAG mode. The Code
Composer Studio IDE target configuration used to communicate with the embedded XDS110 emulator
must be configured for 2-pin cJTAG mode.
Also, GPIO19/X1 and GPIO18/X2 pins are connected on the on-board crystal (Y1) and are not
connected to the 120-pin HSEC8 Edge Card Interface.
These and other hardware settings can be modified through switches on the controlCARD. For more
details, see Table 4-1.
The following PDF documents are provided, as part of C2000Ware, to describe where each of the F280015x
MCU pins appear on the controlCARD connector/docking station:
•TMDSCNCD2800157_<rev>_120cCARD_pinout – Indicates where each MCU pin goes on the HSEC
controlCARD connector or the 120/180-pin controlCARD docking station.
•TMDSCNCD2800157_<rev>_100DIM_map – Indicates where each MCU pin goes on the DIM100
controlCARD connector or the DIM100 docking station. This assumes that the TMDSADAP180TO100
adapter card is used.
More information on the controlCARD docking station can be found in the C2000Ware at the following location:
<install directory>\c2000\C2000Ware_<rev>\boards\controlCARDs\TMDSCNCD2800157\Rx_x
4.4 Experimentation Software
Code Composer Studio (CCS) Integrated Development Environment (IDE) is recommended for developing
and debugging software for the C2000 series of MCUs. The CCS IDE is free to download and use with the
controlCARD. Introductory videos for CCS IDE are available at training.ti.com.
C2000Ware contains a full suite of example software designed to work with the F280015x controlCARD.
This software package includes many example projects that allow the user to experiment with the ADC, PWM,
and other C2000 peripherals.
Support files for both register-level and driver-level programming are included with C2000Ware:
• Register header files are located at:
<install_directory>\ti\c2000\C2000Ware_<rev>\device_support\F280015x\examples
• Driverlib programming examples are located at:
<install_directory>\ti\c2000\C2000Ware_<rev>\driverlib\F280015x\examples
For users new to the F280015x series of devices and CCS IDE, TI's C2000 Academy provides several easy-to-
follow training modules and hands-on lab exercises to help users get started quickly.
5 Special Notes
5.1 XDS110 Emulator and SCI (UART) Connectivity
The F2800157 controlCARD provides emulation and USB-to-UART adapter functionality on the controlCARD.
This allows for a convenient method to debug and demonstrate the F280015x MCU.
Note that the MSP432 chip, support circuitry, and associated components are placed in Macro A (the left section
of the controlCARD). Each of these components contains an additional “:A” within the component reference
designator (that is, R2:A for resistor 2 in Macro A) (see Figure 6-1 and Figure 6-2).
The configuration of the switches on S1:A determine if either the on-board emulator or an external emulator is
connected to the MCU, and if the SCI (UART) pins on the MCU are connected to the COM port on the USB-C
connector (see Table 4-1).
5.2 Clocking Methodology
This controlCARD is required to support a broad range of TI's baseboards. Several designs rely on GPIO18
and GPIO19 for SPIA, while others require these GPIO to be utilized as a precision clock input source. To
accommodate both of these systems, a switch (S3) has been added to the design. This methodology can not be
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used in a final system as this methodology increases EMI emissions and creates robustness susceptibilities. The
system designer must choose the best way to implement the clocking circuity for a given system.
5.3 Evaluation of the Analog-to-Digital Converters (ADCs)
When using the F2800157 on-chip ADCs, there are some useful guideline to follow to realize the performance
numbers listed in the device-specific data manual. This is especially true for the AC parameters such as: SNR,
THD, and SINAD. Furthermore, it can also be shown that there is a direct correlation between the SNR of the
ADC result and the spread of ADC codes seen for a DC input; as such, these tips improve the range and
standard deviation of a DC input as well. Finally, while topics addressed are with respect to the controlCARD, the
topics are applicable to other implementations using the F2800157 MCU as well.
On-board resistors and capacitors: By default all inline resistors to the ADC pins are a simple 0-Ω shunt
and all capacitors to the ground plane are not populated. While this circuit can be used to supply the ADC
inputs with a voltage, likely both the resistor (R) and capacitor (C) need to be populated based on the voltage
source characteristics. Referring to the ADC Input Model, the ADC input has their own RC network made up
of the internal sample and hold capacitor, switch resistance, and parasitic capacitance. By changing the inline
resistance and parallel capacitor, we can optimize the input circuit to assist with settling time and/or filtering the
input signal. Finally, it is recommended in general to use Negative-Positive 0 PPM/°C (NP0/C0G) capacitors as
these have better stability over temperature and across input frequencies than other types of capacitors.
Voltage source and drive circuitry: While the on-chip ADCs are 12-bit architecture (4096 distinct output codes
when converting an analog signal to the digital domain), the translation only is as precise as the input provided to
the ADC. The typical rule of thumb when defining the source resolution to realize the full specification of an ADC
is to have a 1-bit better source than the converter. In this case, that means that ideally the analog input can be
accurate to 13-bits.
Typically voltage supplies or regulators are not designed to be precise, but rather accommodate a wide range of
current loads within a certain tolerance and for this reason are not ideal to show the performance of a higher bit
ADC, like the one on the F2800157. This also does not take into account that many times the supply in question
is providing the main voltage to power the MCU itself; which also introduces noise and other artifacts into the
signal.
In addition to the quality of the input signal, there is also the aspect of the load presented to the ADC when the
ADC samples the input. Ideally, an input to an ADC has zero impedance so as not to impact the internal R/C
network when the sampling event takes place. In many applications, however, the voltages that are sampled
by the ADC are derived from a series of resistor networks, often large in value to decrease the active current
consumption of the system. A solution to isolate the source impedance from the ADC sampling network is to
place an operational amplifier in the signal path. Not only does this isolate the impedance of the signal from the
ADC, it also shields the source itself from any effects the sampling network can have on the system.
Recommended source for evaluation: The Precision Signal Injector (PSI) EVM from TI can be used to
validate the ADC performance on the F2800157 ControlCARD. This EVM supports both single ended as well as
differential ended outputs using a 16-bit DAC as the signal source then passed through a high precision op-amp
with post amplifier filtering. The EVM is powered and controlled through a standard USB connection from a host
PC and includes a GUI to control its output. The outputs are routed through single or dual SMA type connectors;
it is highly recommended to place an additional female SMA connector (Figure 5-1) on the controlCARD docking
station to receive the signal by way of SMA for best noise immunity. For the local RC network, 30-Ω resistors
and 300-pF capacitors were used. Using this setup the ADC parameters were observed to be consistent with the
numbers in the device-specific data sheet.
Figure 5-1. Female SMA Connector
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6 Hardware References
WARNING
When the controlCARD is used in a high-voltage setup, confirm that the voltages and isolation
requirements are identified and understood prior to energizing the board or simulation. When
energized, the controlCARD or components connected to the controlCARD cannot be touched.
Furthermore, the capacitor C7:A must be removed to minimize the possibility of leakage current
flowing across the isolation barrier of the controlCARD.
S1:A –Isolated
emulation and UART
communication
enable switches
J1:A –USB
emulation/UART
connector
D1/D2 – GPIO31
and GPIO34
Connected User
LEDs
S3 –GPIO18 and
GPIO19 function
selection switch
S4 –Boot Mode
selection switches
S5 –ADC VREFHI
and A10/C10
selection switch
U1 –C2000
F2800157
microcontroller
D3 –3.3-V power
good LED
EVM Revision
LED1:A –5.0-V
power good LED
S2:A –GPIO35 and
GPIO37 function
selection switch
S1 – GPIO10 and
GPIO11 connection
switch
Figure 6-1. Key Components on the controlCARD - Front
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Emulation Circuitry –
Isolated emulation
circuitry denoted by “:A”
Figure 6-2. Key Components on the controlCARD - Back
Table 6-1. Hardware Connections
Connectors
J1:A Emulation/UART connector/Power - USB-C connector used to provide XDS110 emulation and USB-to-
UART (SCI) communication through MSP432 logic. S1:A determines which connections are enabled to the
MCU.
The USB-C connector also provides power on the controlCARD.
LEDs
LED1:A Turns on (red) when 5 V is supplied to the controlCARD
(5 V can be supplied either through the USB-C connector or externally through the HSEC connector)
LED2:A/LED3:A JTAG/UART RX/TX toggle indicator (blue)
D1 Controlled by GPIO31 with negative logic (red)
D2 Controlled by GPIO34 with negative logic (red)
D3 Turns on (green) when 3.3V is supplied to the controlCARD from the on-board LDO (U3)
Resistors and Capacitors
R23-R38 ADC RC input filter resistors: Series resistors which can be used to create an RC filter on the ADC's
input.
C29-C44 ADC RC input filter capacitors: Optional capacitors, not populated by default, for the ADC input's RC
filters.
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