Switches
S1:A
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.
S1
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
S2
Boot Mode Switch:
Controls the Boot Options of the F280039C device, see
. For a full
description, see the device-specific data sheet.
S3
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.
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 F280039C device.
TP3
MCU 1.2 V:
VDD "core supply" to the F280039C device. Note that this controlCARD has been
designed to use the internal voltage regulator.
TP4
Device Ground
TP5
XRSn of F280039C device:
Connected to the undervoltage output from the 3.3-V voltage
supervisor.
TP6
Overvoltage output:
Connected to the overvoltage output from the 3.3-V voltage supervisor.
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. S2, 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
Hardware References
SPRUIZ4B – MAY 2021 – REVISED JUNE 2022
TMS320F280039C controlCARD Information Guide
9
Copyright © 2022 Texas Instruments Incorporated