SPRUJ15B November 2021 – October 2022

6 Hardware References

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 can not be touched. Furthermore, the capacitor C7:A can be removed to minimize the possibility of leakage current flowing across the isolation barrier of the controlCARD.

Figure 6-1 Key Components on the controlCARD - Front

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 GPIO–24 with negative logic (red)
D2	Controlled by GPIO–39 with negative logic (red)
D3	Turns on (green) when 3.3 V is supplied to the controlCARD from the on-board LDO (U3)

Resistors and Capacitors
R18-R33	ADC RC input filter resistors: Series resistors which can be used to create an RC filter on the ADC's input.
C24-C39	ADC RC input filter capacitors: Optional capacitors, not populated by default, for the ADC input's RC filters.
R11 and C13	External precision resistor. Optional external precision resistor (ExtR), no populated by default, to achieve better accuracy with INTOSC2. Refer to the F280013x data sheet for more information on the ExtR feature.

Switches
S1:A	Isolated emulation and UART communication enable switches:
	S1:A Position 1 – USB JTAG Enable: ON – All 4 JTAG signals from the XDS110 emulation logic are passed across the isolation barrier. By default, only the TMS and TCK signals are connected to the MCU. This setting is valid when the MCU is being debugged or programmed via the on-card XDS110 emulator in cJTAG mode. To enable full JTAG mode, S1 must be additionally configured. OFF – The 4 JTAG signals from the XDS110 emulation logic are NOT passed across the isolation barrier and are not connected to the MCU. This setting is valid when the device boots from FLASH, boots from a peripheral directly, or when an external JTAG emulator is used.
	S1:A Position 2 – USB UART communication enable: ON – The C2000 MCU GPIO-28 and GPIO-29 are connected to the MSP432 on the XDS110. This allows UART communication to a computer COM port. However, in this position, GPIO-28 and GPIO-29 are reserved for COM port use. The corresponding pins on the 180-pin controlCARD connector cannot be used for another function. OFF – The C2000 MCU GPIO-28 and GPIO-29 are NOT connected to the MSP432 on the XDS110. The corresponding pins on the 180-pin controlCARD connector can be used for another function.
S1	GPIO35/TDI and GPIO37/TDO Function Switch: This switch selects the function of the GPIO35 and GPIO37 pins Upward position - GPIO35 and GPIO37 are connected to HSEC pins 6 and 8, respectively. This setting is valid when using these pins as TDI and TDO in full JTAG mode. Downward position - GPIO35 and GPIO37 are connected to HSEC pins 80 and 82, respectively. This setting is valid when using these pins as GPIO.
S2	PWM6 or external crystal selection switch: This switch enables the use of PWM6 or an external crystal. This methodology was required to support the full range of TI's baseboards and is not recommended in a production system. For full details, see Section 5.2.
S3	Boot Mode Switch: Controls the Boot Options of the F280013x device, see the Table 6-2. For a full description, see the device-specific data sheet.
S4	Analog Configuration Switch: This switch selects the source for VREFHI and the routing of the A8/C11 ADC channel.
	S4 Position 1 (left switch) – ADC channel A8/C11 HSEC pin selection Upward position – Channel A8/C11 goes to HSEC pin 34 Downward Position – Channel A8/C11 goes to HSEC pin 30
	Position 2 (right switch) - ADC voltage reference selection. Upward position – Internal voltage reference Downward Position – External voltage reference Note that additional software configuration is required to enable the ADC internal or external voltage reference.

Test Points
TP1:A	USB 5.0 V input: This is the 5 V supply from the USB-C connector.
TP2:A	USB GND input: This GND from the USB-C connector.
TP1	HSEC 5.0 V input: 5.0 V input provided to the controlCARD.
TP2	Unfiltered 3.3 V: Provides power to the F280013x device.
TP3	MCU 1.2 V: VDD 'core supply' to the F280013x device. Note that this controlCARD has been designed to use the internal voltage regulator.
TP4	Device Ground
TP5	XRSn of F280013x device: Connected to the XRSn pin of the F280013x device.

Note: On the front of the controlCARD, test points are indicated by their TPx number.
On the back of the controlCARD, test points are indicated by their signal.

Table 6-2 S3, Bootmode Selection Table

Mode	Switch Position 1 (left switch, GPIO-24)	Switch Position 2 (right switch, GPIO-32)	Boot From
00	0 (down)	0 (down)	Parallel I/O
01	1 (up)	0 (down)	SCI/Wait Boot
02	0 (down)	1 (up)	CAN
03	1 (up)	1 (up)	Flash/USB