MSP-FET-432ADPTR
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6
SLAU571A – March 2015 – Revised May 2016
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Copyright © 2015–2016, Texas Instruments Incorporated
Hardware
1.1
MSP-FET-432ADPTR
1.1.1 Introduction
The MSP-FET-432ADPTR is an adapter to convert the 14-pin JTAG connector to either standard ARM 10-
pin or ARM 20-pin connectors. This allows for use of the
MSP-FET
debug probe with
MSP432
Cortex-M
devices.
1.1.2 Key Features
•
Use MSP-FET to debug MSP432 Cortex-M Devices
•
10-pin ARM support
•
20-pin ARM support
1.1.3 Kit Contents
•
1x MSP-FET-432ADPTR 14-pin JTAG to ARM adapter
1.1.4 Configuration and Usage
The MSP-FET-432ADPTR allows the use of the MSP-FET debug probe with the MSP432 Cortex-M family
of devices. Operation is straight-forward, with only one selection for how the power is sourced. This
selection is required because of the difference in the power source and sense behavior of the MSP-FET
and the ARM debug standard.
The MSP-FET debug probe has two power states:
1. V
CC
Output
•
MSP-FET outputs a voltage to the target.
•
Output voltage is configurable in the IDE.
•
In V
CC
output state, the MSP-FET voltage sense functionality is not enabled.
2. V
CC
Sense
•
MSP-FET senses an existing external voltage (not from the MSP-FET itself).
•
The JTAG signals are level shifted accordingly to match this voltage.
•
In V
CC
Sense state, the MSP-FET output voltage is not provided.
The
Cortex-M debug standard
works a bit differently. In this standard, the V
CC
Sense is always active, no
matter where the external voltage is coming from. Some debug probes, such as the IAR I-jet and Segger
J-Link have a voltage output, all while still sensing the V
CC
Sense.
Table 1-1. Matrix of S1 Switch Orientation Compared to ARM Connector Option
V
CC
Sense (S1 Left)
V
CC
Output (S1 Right)
ARM 20-pin connector
• External power is sensed through ARM pin 1
• External power needs to be connected to
debug target
• Power is provided by the MSP-FET through
ARM pin 19.
• Alternatively, power can be wired to the target
using connector J4.
• This output matches other ARM debug probes
like IAR i-Jet and SEGGER J-Link
• Note that the IAR i-Jet outputs 3.3 V, and
SEGGER J-Link outputs 5 V on this pin.
Ensure the target accounts for the specific
voltage output by MSP-FET.
ARM 10-pin connector
• External power is sensed through ARM pin 1
• External power needs to be connected to
debug target
• There is no pin to connect the power output
on the 10 pin connector
• Power output is provided on connector J4.
This can be wired to the target board.
