Datasheet

MSP430F5510, MSP430F5509, MSP430F5508, MSP430F5507

MSP430F5506, MSP430F5505, MSP430F5504, MSP430F5503

MSP430F5502, MSP430F5501, MSP430F5500

www.ti.com

SLAS645I –JULY 2009–REVISED NOVEMBER 2013

Bootstrap Loader (BSL)

The BSL enables users to program the flash memory or RAM using various serial interfaces. Access to the

device memory via the BSL is protected by an user-defined password. For complete description of the features of

the BSL and its implementation, see the MSP430 Programming Via the Bootstrap Loader User's Guide

(SLAU319).

USB BSL

All devices come pre-programmed with the USB BSL. Use of the USB BSL requires external access to the six

pins shown in Table 5. In addition to these pins, the application must support external components necessary for

normal USB operation (for example, proper crystal on XT2IN and XT2OUT and proper decoupling). For further

details on interfacing to development tools and device programmers, see the MSP430 Hardware Tools User's

Guide (SLAU278).

Table 5. USB BSL Pin Requirements and Functions

DEVICE SIGNAL BSL FUNCTION

RST/NMI/SBWTDIO Entry sequence signal

PU.0/DP USB data terminal DP

PU.1/DM USB data terminal DM

PUR USB pullup resistor terminal

VBUS USB bus power supply

VSSU USB ground supply

NOTE

The default USB BSL evaluates the logic level of the PUR pin after a BOR reset. If it is

pulled high externally, then the BSL is invoked. Therefore, unless the BSL should be

invoked, it is important to keep PUR pulled low after a BOR reset, even if BSL or USB is

never used. Applying a 1-MΩ resistor to ground is recommended.

UART BSL

A UART BSL is also available that can be programmed by the user into the BSL memory by replacing the pre-

programmed factory-supplied USB BSL. Use of the UART BSL requires external access to the six pins shown in

Table 6. For further details on interfacing to development tools and device programmers, see the MSP430

Hardware Tools User's Guide (SLAU278).

Table 6. UART BSL Pin Requirements and Functions

DEVICE SIGNAL BSL FUNCTION

RST/NMI/SBWTDIO Entry sequence signal

TEST/SBWTCK Entry sequence signal

P1.1 Data transmit

P1.2 Data receive

VCC Power supply

VSS Ground supply

Product Folder Links: MSP430F5510 MSP430F5509 MSP430F5508 MSP430F5507 MSP430F5506 MSP430F5505

MSP430F5504 MSP430F5503 MSP430F5502 MSP430F5501 MSP430F5500