Table 6-2. S2, Bootmode Selection Table - Texas Instruments TMS320F280039C User Manual

Controlcard

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Switches

S1:A

Test Points

TP1:A

TP2:A

TP1

TP2

TP3

TP4

TP5

TP6

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.

Mode

SPRUIZ4B – MAY 2021 – REVISED JUNE 2022

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Isolated emulation and UART communication enable switches:

S1:A Position 1 – USB JTAG Enable:

•

ON – All 4 JTAG signals between the XDS110 emulation logic and the MCU will be connected.

This setting is valid when the MCU is being debugged or programmed via the on-card XDS110

emulator.

•

OFF – The XDS110 emulation logic will NOT be connected to the MCU JTAG pins. This setting

is valid when the device will boot from FLASH, boot from a peripheral directly, or when an

external JTAG emulator will be used.

S1:A Position 2 – USB UART communication enable:

•

ON – The C2000 MCU's GPIO-28 and GPIO-29 will be 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 will be reserved for COM port use. The corresponding pins on the

180-pin controlCARD connector cannot be used for another function.

•

OFF – The C2000 MCU's GPIO-28 and GPIO-29 will NOT be connected to the MSP432 on the

XDS110. The

Corresponding pins on the 180-pin controlCARD connector can be used for another function.

SPIA or external crystal selection switch: This switch enables the use of SPIA 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

Boot Mode Switch: Controls the Boot Options of the F280039C device, see

description, see the device-specific data sheet.

VREFHI Source Configuration Switch: This switch selects the source for VREFHI (internal or

external through the 180-pin controlCARD connector)

•

Upward position – Internal voltage reference

•

Downward Position – External voltage reference

Note that additional software configuration is required to enable the ADC's internal or external

voltage reference.

USB 5.0-V input: This is the 5-V supply from the USB-C connector.

USB GND input: This GND from the USB-C connector.

HSEC 5.0-V input: 5.0-V input provided to the controlCARD.

Unfiltered 3.3 V: Provides power to the F280039C device.

MCU 1.2 V: VDD "core supply" to the F280039C device. Note that this controlCARD has been

designed to use the internal voltage regulator.

Device Ground

XRSn of F280039C device: Connected to the undervoltage output from the 3.3-V voltage

supervisor.

Overvoltage output: Connected to the overvoltage output from the 3.3-V voltage supervisor.

Note