Texas Instruments MSP430G2755, Manual

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MSP430G2955
MSP430G2855
MSP430G2755
www.ti.com SLAS800 – MARCH 2013
Memory Organization
Table 8. Memory Organization
MSP430G2755 MSP430G2855 MSP430G2955
Memory Size 32kB 48kB 56kB
Main: interrupt vector Flash 0xFFFF to 0xFFC0 0xFFFF to 0xFFC0 0xFFFF to 0xFFC0
Main: code memory Flash 0xFFFF to 0x8000 0xFFFF to 0x4000 0xFFFF to 0x2100
Information memory Size 256 Byte 256 Byte 256 Byte
Flash 0x10FF to 0x1000 0x10FF to 0x1000 0x10FF to 0x1000
RAM (total) Size 4kB 4kB 4kB
0x20FF to 0x1100 0x20FF to 0x1100 0x20FF to 0x1100
Extended Size 2KB 2KB 2KB
0x20FF to 0x1900 0x20FF to 0x1900 0x20FF to 0x1900
Mirrored Size 2KB 2KB 2KB
0x18FF to 0x1100 0x18FF to 0x1100 0x18FF to 0x1100
RAM (mirrored at 0x18FF to
Size 2KB 2KB 2KB
0x1100)
0x09FF to 0x0200 0x09FF to 0x0200 0x09FF to 0x0200
Peripherals 16-bit 0x01FF to 0x0100 0x01FF to 0x0100 0x01FF to 0x0100
8-bit 0x00FF to 0x0010 0x00FF to 0x0010 0x00FF to 0x0010
8-bit SFR 0x000F to 0x0000 0x000F to 0x0000 0x000F to 0x0000
Bootstrap Loader (BSL)
The MSP430 BSL enables users to program the flash memory or RAM using a UART serial interface. Access to
the MSP430 memory via the BSL is protected by 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 ).
Table 9. BSL Function Pins
BSL FUNCTION DA PACKAGE PINS RHA PACKAGE PINS
Data transmit 32 - P1.1 30 - P1.1
Data receive 10 - P2.2 8 - P2.2
Flash Memory
The flash memory can be programmed via the Spy-Bi-Wire or JTAG port or in-system by the CPU. The CPU can
perform single-byte and single-word writes to the flash memory. Features of the flash memory include:
•
Flash memory has n segments of main memory and four segments of information memory (A to D) of
64 bytes each. Each segment in main memory is 512 bytes in size.
• Segments 0 to n may be erased in one step, or each segment may be individually erased.
• Segments A to D can be erased individually or as a group with segments 0 to n. Segments A to D are also
called information memory.
• Segment A contains calibration data. After reset segment A is protected against programming and erasing. It
can be unlocked but care should be taken not to erase this segment if the device-specific calibration data is
required.
Copyright © 2013, Texas Instruments Incorporated
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