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MSP430F5507 Scheda tecnica(PDF) 53 Page - Texas Instruments |
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MSP430F5507 Scheda tecnica(HTML) 53 Page - Texas Instruments |
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53 / 125 page  53 MSP430F5510, MSP430F5509, MSP430F5508 MSP430F5507, MSP430F5506, MSP430F5505, MSP430F5504 MSP430F5503, MSP430F5502, MSP430F5501, MSP430F5500 www.ti.com SLAS645L – JULY 2009 – REVISED MAY 2020 Submit Documentation Feedback Product Folder Links: MSP430F5510 MSP430F5509 MSP430F5508 MSP430F5507 MSP430F5506 MSP430F5505 MSP430F5504 MSP430F5503 MSP430F5502 MSP430F5501 MSP430F5500 Detailed Description Copyright © 2009–2020, Texas Instruments Incorporated 6.5 Bootloader (BSL) The BSL enables users to program the flash memory or RAM using various serial interfaces. Access to the device memory through the BSL is protected by an user-defined password. For complete description of the features of the BSL and its implementation, see MSP430 Programming With the Bootloader (BSL). 6.5.1 USB BSL All devices come preprogrammed with the USB BSL. Use of the USB BSL requires external access to six pins (see Table 6-3). 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. Table 6-3. 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. TI recommends applying a 1-MΩ resistor to ground. 6.5.2 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 six pins (see Table 6-4). For further details on interfacing to development tools and device programmers, see the MSP430 Hardware Tools User's Guide. Table 6-4. 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 |
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