Texas Instruments MSP430G2744DA, Manual

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MSP430G2744, MSP430G2544, MSP430G2444
www.ti.com SLAS892C – MARCH 2013 – REVISED SEPTEMBER 2014
6.6 Memory Organization
Table 6-8. Memory Organization
MSP430G2444 MSP430G2544 MSP430G2744
Memory Size 8KB Flash 16KB Flash 32KB Flash
Main: interrupt vector Flash 0FFFFh-0FFC0h 0FFFFh-0FFC0h 0FFFFh-0FFC0h
Main: code memory Flash 0FFFFh-0E000h 0FFFFh-0C000h 0FFFFh-08000h
Size 256 Byte 256 Byte 256 Byte
Information memory
Flash 010FFh-01000h 010FFh-01000h 010FFh-01000h
Size 1KB 1KB 1KB
Boot memory
ROM 0FFFh-0C00h 0FFFh-0C00h 0FFFh-0C00h
512 Byte 512 Byte 1KB
RAM Size
03FFh-0200h 03FFh-0200h 05FFh-0200h
16-bit 01FFh-0100h 01FFh-0100h 01FFh-0100h
Peripherals 8-bit 0FFh-010h 0FFh-010h 0FFh-010h
8-bit SFR 0Fh-00h 0Fh-00h 0Fh-00h
6.7 Bootstrap Loader (BSL)
The MSP430 bootstrap loader (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 6-9. BSL Function Pins
BSL FUNCTION DA PACKAGE PINS RHA PACKAGE PINS YFF PACKAGE PINS
Data transmit 32 - P1.1 30 - P1.1 G3 - P1.1
Data receive 10 - P2.2 8 - P2.2 A5 - P2.2
6.8 Flash Memory
The flash memory can be programmed via the JTAG port, the bootstrap loader, 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.
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