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. Table 6-4 lists the JTAG pin requirements. For a complete description of the features of the JTAG interface and its implementation, see MSP430 Programming With the JTAG Interface. For further details on interfacing to development tools and device programmers, see the MSP430 Hardware Tools User's Guide.
|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|