Maxim Integrated DS4830A Optical Microcontroller - Manual (Page 19)

DS4830A User’s Guide
19
2.4.4.1 – Memory Map When Executing from Flash Memory
When executing from the flash memory:
• Read and write operations of SRAM memory are executed normally.
• The utility ROM can be read as data, starting at 8000h of the data space. The utility ROM cannot be written.
Figure 2-3 illustrates the mapping of the SRAM and utility ROM memory segments into data memory space when code is
executing from the flash memory segment.
2K * 16
SRAM
16K * 16
FLASH
(SEGMENT 0)
4K * 16
UTILITY ROM
PROGRAM
SPACE
16K * 16
FLASH
(SEGMENT 1)
0000h
3FFFh
4000h
7FFFh
8FFFh
A000h
A7FFh
FFFFh
8000h
4K * 8
SRAM
DATA SPACE
(BYTE MODE)
0000h
7FFFh
9FFFh
FFFFh
8000h
4K * 16
UTILITY ROM
0000h
7FFFh
8FFFh
FFFFh
8000h
0FFFh
8K * 8
UTILITY ROM
DATA SPACE
(WORD MODE)
2K * 16
SRAM
07FFh
EXECUTING FROM
Figure 2-3: Memory Map When Executing from Flash Memory