MSP430FR59691 Datasheet, PDF (57/131 Pages) Texas Instruments – MSP430FR59xx Mixed-Signal Microcontrollers

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MSP430FR5969, MSP430FR59691, MSP430FR5968, MSP430FR5967
MSP430FR5959, MSP430FR5958, MSP430FR5957
MSP430FR5949, MSP430FR5948, MSP430FR5947, MSP430FR59471
SLAS704C – OCTOBER 2012 – REVISED JUNE 2014
6.7 JTAG Operation
6.7.1 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-
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. JTAG Pin Requirements and Functions
DEVICE SIGNAL
PJ.3/TCK
PJ.2/TMS
PJ.1/TDI/TCLK
PJ.0/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
6.7.2 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 6-7. 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 6-7. 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 and output
Power supply
Ground supply
Copyright © 2012–2014, Texas Instruments Incorporated
Detailed Description
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