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MSP430X11X1 Datasheet(PDF) 11 Page - Texas Instruments |
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MSP430X11X1 Datasheet(HTML) 11 Page - Texas Instruments |
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11 / 45 page  MSP430x11x1 MIXED SIGNAL MICROCONTROLLER SLAS241C – SEPTEMBER 1999 – REVISED JUNE 2000 11 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 boot ROM containing bootstrap loader (continued) Program execution begins with the bootstrap vector at 0C00h (boot ROM) if a minimum of two positive edges have been applied to TEST while RST/NMI is low, and TEST is high when RST/NMI goes from low to high. The TEST signal is normally used internally to switch pins P1.4, P1.5, P1.6, and P1.7 between their application function and the JTAG function. If the second rising edge at TEST is applied while RST/NMI is held low, the internal TEST signal is held low and the pins remain in the application mode: RST/NMI PIN TEST (Internal) TEST PIN Bootstrap loader Starts VCC Test mode can be entered again after TEST is taken low and then back high. The bootstrap loader will not be started (via the vector in address 0C00h), if: D There were less than two positive edges at TEST while RST/NMI is low D TEST is low if RST/NMI goes from low to high D JTAG has control over the MSP430 resources D Supply voltage VCC drops and a POR is executed WARNING: The bootstrap loader starts correctly only if the RST/NMI pin is in reset mode. If it is switched to the NMI function, unpredictable program execution may result. However, a bootstrap-load may be started using software and the bootstrap vector, for example the instruction BR &0C00h. |
Similar Part No. - MSP430X11X1 |
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Similar Description - MSP430X11X1 |
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