Datasheet
MSP430FR4133, MSP430FR4132, MSP430FR4131
SLAS865B –OCTOBER 2014–REVISED AUGUST 2015
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Table 6-4. JTAG Pin Requirements and Function
DEVICE SIGNAL DIRECTION JTAG FUNCTION
P1.4/MCLK/TCK/A4/VREF+ IN JTAG clock input
P1.5/TA0CLK/TMS/A5 IN JTAG state control
P1.6/TA0.2/TDI/TCLK/A6 IN JTAG data input/TCLK input
P1.7/TA0.1/TDO/A7 OUT JTAG data output
TEST/SBWTCK IN Enable JTAG pins
RST/NMI/SBWTDIO IN External reset
VCC Power supply
VSS Ground supply
6.6 Spy-Bi-Wire Interface (SBW)
The MSP430 family supports the 2-wire Spy-Bi-Wire interface. Spy-Bi-Wire can be used to interface with
MSP430 development tools and device programmers. Table 6-5 shows the Spy-Bi-Wire interface pin
requirements. For further details on interfacing to development tools and device programmers, refer to the
MSP430 Hardware Tools User's Guide (SLAU278).
Table 6-5. Spy-Bi-Wire Pin Requirements and Functions
DEVICE SIGNAL DIRECTION SBW 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
6.7 FRAM
The FRAM can be programmed using the JTAG port, Spy-Bi-Wire (SBW), the BSL, or in-system by the
CPU. Features of the FRAM include:
• Byte and word access capability
• Programmable wait state generation
• Error correction code (ECC) generation
6.8 Memory Protection
The device features memory protection that can restrict user access and enable write protection:
• Securing the whole memory map to prevent unauthorized access from JTAG port or BSL, by writing
JTAG and BSL signatures using the JTAG port, SBW, the BSL, or in-system by the CPU.
• Write protection enabled to prevent unwanted write operation to FRAM contents by setting the control
bits in System Configuration register 0. For more detailed information, refer to the SYS chapter in the
MSP430FR4xx and MSP430FR2xx Family User's Guide (SLAU445).
NOTE
The FRAM is protected by default on PUC. To write to FRAM during code execution, the
application must first clear the corresponding PFWP or DFWP bit in System Configuration
Register 0 to unprotect the FRAM.
38 Detailed Description Copyright © 2014–2015, Texas Instruments Incorporated
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Product Folder Links: MSP430FR4133 MSP430FR4132 MSP430FR4131