Datasheet

MSP430G2x33

MSP430G2x03

www.ti.com

SLAS734F –APRIL 2011–REVISED MAY 2013

Memory Organization

Table 8. Memory Organization

MSP430G2233 MSP430G2333 MSP430G2433

MSP430G2533

MSP430G2203 MSP430G2303 MSP430G2403

Memory Size 2kB 4kB 8kB 16kB

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

Main: code memory Flash 0xFFFF to 0xF800 0xFFFF to 0xF000 0xFFFF to 0xE000 0xFFFF to 0xC000

Information memory Size 256 Byte 256 Byte 256 Byte 256 Byte

Flash 010FFh to 01000h 010FFh to 01000h 010FFh to 01000h 010FFh to 01000h

RAM Size 256 Byte 256 Byte 512 Byte 512 Byte

0x02FF to 0x0200 0x02FF to 0x0200 0x03FF to 0x0200 0x03FF to 0x0200

Peripherals 16-bit 01FFh to 0100h 01FFh to 0100h 01FFh to 0100h 01FFh to 0100h

8-bit 0FFh to 010h 0FFh to 010h 0FFh to 010h 0FFh to 010h

8-bit SFR 0Fh to 00h 0Fh to 00h 0Fh to 00h 0Fh to 00h

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

20-PIN PW PACKAGE

BSL FUNCTION 28-PIN PACKAGE PW 32-PIN PACKAGE RHB

20-PIN N PACKAGE

Data transmit 3 - P1.1 3 - P1.1 1 - P1.1

Data receive 7 - P1.5 7 - P1.5 5 - P1.5

Flash Memory

The flash memory can be programmed via the Spy-Bi-Wire/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.