MSP430F5529, MSP430F5528, MSP430F5527, MSP430F5526
MSP430F5525, MSP430F5524, MSP430F5522, MSP430F5521
MSP430F5519, MSP430F5517, MSP430F5515, MSP430F5514, MSP430F5513
www.ti.com
SLAS590M – MARCH 2009 – REVISED NOVEMBER 2015
6.6
JTAG Operation
6.6.1
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 6-
5
. 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 6-5. JTAG Pin Requirements and Functions
DEVICE SIGNAL
DIRECTION
FUNCTION
PJ.3/TCK
IN
JTAG clock input
PJ.2/TMS
IN
JTAG state control
PJ.1/TDI/TCLK
IN
JTAG data input, TCLK input
PJ.0/TDO
OUT
JTAG data output
TEST/SBWTCK
IN
Enable JTAG pins
RST/NMI/SBWTDIO
IN
External reset
VCC
Power supply
VSS
Ground supply
6.6.2
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 6-6
. 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 6-6. Spy-Bi-Wire Pin Requirements and Functions
DEVICE SIGNAL
DIRECTION
FUNCTION
TEST/SBWTCK
IN
Spy-Bi-Wire clock input
RST/NMI/SBWTDIO
IN, OUT
Spy-Bi-Wire data input/output
VCC
Power supply
VSS
Ground supply
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