MSP430x22x2, MSP430x22x4
MIXED SIGNAL MICROCONTROLLER
SLAS504A 鈭?JULY 2006 鈭?REVISED DECEMBER 2006
memory organization
MSP430F223x
Memory
Main: interrupt vector
Main: code memory
Information memory
Boot memory
RAM
Peripherals
Size
Flash
Flash
Size
Flash
Size
ROM
Size
16-bit
8-bit
8-bit SFR
8KB Flash
0FFFFh鈭?FFC0h
0FFFFh鈭?E000h
256 Byte
010FFh鈭?1000h
1KB
0FFFh鈭?C00h
512 Byte
03FFh鈭?200h
01FFh鈭?100h
0FFh鈭?10h
0Fh鈭?0h
MSP430F225x
16KB Flash
0FFFFh鈭?FFC0h
0FFFFh鈭?C000h
256 Byte
010FFh鈭?1000h
1KB
0FFFh鈭?C00h
512 Byte
03FFh鈭?200h
01FFh鈭?100h
0FFh鈭?10h
0Fh鈭?0h
MSP430F227x
32KB Flash
0FFFFh鈭?FFC0h
0FFFFh鈭?8000h
256 Byte
010FFh鈭?1000h
1KB
0FFFh鈭?C00h
1KB
05FFh鈭?200h
01FFh鈭?100h
0FFh鈭?10h
0Fh鈭?0h
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 application report,
Features of the
MSP430 Bootstrap Loader,
TI literature number SLAA089.
BSL Function
Data Transmit
Data Receive
DA Package Pins
32 鈭?P1.1
10 鈭?P2.2
RHA Package Pins
30 鈭?P1.1
8 鈭?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:
D
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.
D
Segments 0 to n may be erased in one step, or each segment may be individually erased.
D
Segments A to D can be erased individually, or as a group with segments 0鈭抧.
Segments A to D are also called
information memory.
D
Segment A contains calibration data. After reset, segment A is protected against programming or erasing.
It can be unlocked, but care should be taken not to erase this segment if the calibration data is required.
16
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