Texas Instruments MSP-EXP430FR5969 Benutzerhandbuch
eZ-FET
Emulator
MCU
Isolation
Jumper Block
Jumper Block
S
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-B
i-
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(
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E
m
u
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RT
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V
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5
V
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Target
MSP430FR5969
MCU
e
Z
-F
ET
MS
P
430F
R
596
9
T
arg
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t
USB Connector
in out
LDO
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USB
Hardware
2.3.4
Emulator Connection – Isolation Jumper Block
The isolation jumper block at Jumper J13 allows the user to connect/disconnect signals that cross from
the eZ-FET domain into the FR5969 target domain. This includes eZ-FET Spy-Bi-Wire signals, application
UART signals, and 3V3 and 5V power (see
the eZ-FET domain into the FR5969 target domain. This includes eZ-FET Spy-Bi-Wire signals, application
UART signals, and 3V3 and 5V power (see
).
Reasons to open these connections:
•
To remove any and all influence from the eZ-FET emulator for high accuracy target power
measurements
measurements
•
To control 3-V and 5-V power flow between eZ-FET and target domains
•
To expose the target MCU pins for other use than onboard debugging and application UART
communication
communication
•
To expose programming and UART interface of the eZ-FET so it can be used for devices other than
the onboard MCU.
the onboard MCU.
Table 3. Isolation Block Connections
Jumper
Description
GND
Ground
V+
3.3-V rail, derived from VBUS by an LDO in the eZ-FET domain
Backchannel UART: Ready-To-Send, for hardware flow control. The target can use this to indicate whether 'it is
RTS >>
ready to receive data from the host PC. The arrows indicate the direction of the signal.
Backchannel UART: Clear-To-Send, for hardware flow control. The host PC (through the emulator) uses this to
CTS <<
indicate whether or not it is ready to receive data. The arrows indicate the direction of the signal.
Backchannel UART: the target FR5969 receives data through this signal. The arrows indicate the direction of the
RXD <<
signal.
Backchannel UART: the target FR5969 sends data through this signal. The arrows indicate the direction of the
TXD >>
signal.
RST
Spy-Bi-Wire emulation: SBWTDIO data signal. This pin also functions as the RST signal (active low)
TST
Spy-Bi-Wire emulation: SBWTCK clock signal. This pin also functions as the TST signal
Figure 10. eZ-FET Isolation Jumper Block Diagram
16
MSP-EXP430FR5969 LaunchPad™ Development Kit User's Guide
SLAU535A – February 2014 – Revised June 2014
Copyright © 2014, Texas Instruments Incorporated