MSP430F5259 datasheet(21/107 Pages) TI1

21 / 107 page

MSP430F5259, MSP430F5258, MSP430F5257, MSP430F5256

MSP430F5255, MSP430F5254, MSP430F5253, MSP430F5252

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SLAS903A – MAY 2013 – REVISED JULY 2013

NOTE

To invoke the BSL from the DVIO domain, the RST/NMI along with the BSLEN pins must

be used for the entry sequence (see DVIO BSL Entry). It is critical not to confuse the

RST/NMI pin with the RSTDVCC/SBWTDIO pin. In other MSP430 devices, SBWTDIO is

shared with the RST/NMI pin and RSTDVCC does not exist. Additional information can be

found in Designing with MSP430F522x and MSP430F521x Devices (SLAA558).

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 RSTDVCC/SBWTDIO is required to interface with MSP430

development tools and device programmers. The JTAG 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). Additional information can be found in Designing

with MSP430F522x and MSP430F521x Devices (SLAA558).

Table 9. JTAG Pin Requirements and Functions

DEVICE SIGNAL

DIRECTION

FUNCTION

PJ.3/TCK

JTAG clock input

PJ.2/TMS

JTAG state control

PJ.1/TDI/TCLK

JTAG data input, TCLK input

PJ.0/TDO

OUT

JTAG data output

TEST/SBWTCK

Enable JTAG pins

RSTDVCC/SBWTDIO

External reset

DVCC, AVCC

Device power supply

DVIO

I/O power supply

DVSS

Ground supply

NOTE

Traditionally, on other MSP430 devices, the RST/NMI pin is used for SBWTDIO, so care

must be taken not to mistakenly use the incorrect pin. On the F525x series of devices, it is

required to use RSTDVCC for SBWTDIO as shown in Table 9. Additional information can

be found inDesigning with MSP430F522x and MSP430F521x Devices (SLAA558).

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