MSP430F673X Datasheet, PDF (24/121 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER

MSP430F673x
MSP430F672x
SLAS731A – DECEMBER 2011 – REVISED APRIL 2012
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Bootstrap Loader (BSL)
The BSL enables users to program the flash memory or RAM using various serial interfaces. Access to the
device memory via the BSL is protected by an user-defined password. 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 MSP430 Programming via the Bootstrap Loader (BSL) (SLAU319).
Table 11. UART BSL Pin Requirements and Functions
DEVICE SIGNAL
RST/NMI/SBWTDIO
TEST/SBWTCK
P3.0
P3.1
VCC
VSS
BSL FUNCTION
Entry sequence signal
Entry sequence signal
Data transmit
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 12. For further
details on interfacing to development tools and device programmers, see the MSP430 Hardware Tools User's
Guide (SLAU278) and MSP430 Programming Via the JTAG Interface (SLAU320).
Table 12. JTAG Pin Requirements and Functions
DEVICE SIGNAL
PJ.3/ACLK/TCK
PJ.2/ADC10CLK/TMS
PJ.1/MCLK/TDI/TCLK
PJ.0/SMCLK/TDO
TEST/SBWTCK
RST/NMI/SBWTDIO
VCC
VSS
Direction
IN
IN
IN
OUT
IN
IN
FUNCTION
JTAG clock input
JTAG state control
JTAG data input/TCLK input
JTAG data output
Enable JTAG pins
External reset
Power supply
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 13. For further details on interfacing to development tools and
device programmers, see the MSP430 Hardware Tools User's Guide (SLAU278) and MSP430 Programming Via
the JTAG Interface (SLAU320).
Table 13. Spy-Bi-Wire Pin Requirements and Functions
DEVICE SIGNAL
TEST/SBWTCK
RST/NMI/SBWTDIO
VCC
VSS
Direction
IN
IN, OUT
FUNCTION
Spy-Bi-Wire clock input
Spy-Bi-Wire data input/output
Power supply
Ground supply
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