Datasheet

MSP430F22x2

MSP430F22x4

SLAS504G –JULY 2006–REVISED AUGUST 2012

www.ti.com

Memory Organization

Table 12. Memory Organization

MSP430F223x MSP430F225x MSP430F227x

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

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 13. 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

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.