MSP430FR573x
MSP430FR572x
SLAS639D –JULY 2011–REVISED AUGUST 2012
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Bootstrap Loader (BSL)
The BSL enables users to program the FRAM or RAM using a UART serial interface. Access to the device
memory by the BSL is protected by an user-defined password. Use of the BSL requires four pins as shown in
Table 7. BSL entry requires a specific entry sequence on the RST/NMI/SBWTDIO and TEST/SBWTCK pins. For
complete description of the features of the BSL and its implementation, see the MSP430 Programming Via the
Bootstrap Loader User's Guide (SLAU319).
Table 7. BSL Pin Requirements and Functions
DEVICE SIGNAL
BSL FUNCTION
Entry sequence signal
Entry sequence signal
Data transmit
RST/NMI/SBWTDIO
TEST/SBWTCK
P2.0
P2.1
VCC
VSS
Data receive
Power supply
Ground supply
JTAG Operation
JTAG Standard Interface
The MSP430 family supports the standard JTAG interface, which requires four signals for sending and receiving
data. The JTAG signals are shared with general-purpose I/O. The TEST/SBWTCK pin is used to enable the
JTAG signals. In addition to these signals, the RST/NMI/SBWTDIO is required to interface with MSP430
development tools and device programmers. The JTAG pin requirements are shown in Table 8. For further
details on interfacing to development tools and device programmers, see the MSP430 Hardware Tools User's
Guide (SLAU278). For a complete description of the features of the JTAG interface and its implementation, see
MSP430 Programming Via the JTAG Interface (SLAU320).
Table 8. JTAG Pin Requirements and Functions
DEVICE SIGNAL
PJ.3/TCK
DIRECTION
FUNCTION
JTAG clock input
JTAG state control
JTAG data input, TCLK input
JTAG data output
Enable JTAG pins
External reset
IN
IN
PJ.2/TMS
PJ.1/TDI/TCLK
PJ.0/TDO
IN
OUT
IN
TEST/SBWTCK
RST/NMI/SBWTDIO
VCC
IN
Power supply
VSS
Ground supply
Spy-Bi-Wire Interface
In addition to the standard JTAG interface, the MSP430 family supports the two-wire Spy-Bi-Wire interface. Spy-
Bi-Wire can be used to interface with MSP430 development tools and device programmers. The Spy-Bi-Wire
interface pin requirements are shown in Table 9. For further details on interfacing to development tools and
device programmers, see the MSP430 Hardware Tools User's Guide (SLAU278). For a complete description of
the features of the JTAG interface and its implementation, see MSP430 Programming Via the JTAG Interface
(SLAU320).
Table 9. Spy-Bi-Wire Pin Requirements and Functions
DEVICE SIGNAL
TEST/SBWTCK
RST/NMI/SBWTDIO
VCC
DIRECTION
IN
FUNCTION
Spy-Bi-Wire clock input
Spy-Bi-Wire data input and output
Power supply
IN, OUT
VSS
Ground supply
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