Datasheet

MSP430F21x2

www.ti.com

SLAS578J –NOVEMBER 2007– REVISED JANUARY 2012

Memory Organization

Table 10. Memory Organization

MSP430F2112 MSP430F2122 MSP430F2132

Memory Size 2 KB 4 KB 8 KB

Main: interrupt vector Flash 0xFFFF to 0xFFC0 0xFFFF to 0xFFC0 0xFFFF to 0xFFC0

Main: code memory Flash 0xFFFF to 0xF800 0xFFFF to 0xF000 0xFFFF to 0xE000

Information memory Size 256 Byte 256 Byte 256 Byte

Flash 0x10FFh to 0x1000 0x10FFh to 0x1000 0x10FFh to 0x1000

Boot memory Size 1 KB 1 KB 1 KB

ROM 0x0FFF to 0x0C00 0x0FFF to 0x0C00 0x0FFF to 0x0C00

RAM Size 256 B 512 Byte 512 Byte

0x02FF to 0x0200 0x03FF to 0x0200 0x03FF 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 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, literature number SLAU319.

Table 11. BSL Function Pins

BSL FUNCTION PW PACKAGE PINS RHB, RTV PACKAGE PINS

Data transmit 22 - P1.1 22 - P1.1

Data receive 10 - P2.2 8 - P2.2

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.