Maxim Integrated MAX31782 - Manual (Page 15)

MaximIntegrated 2-11
MAX31782 User’s Guide
Revision 0; 8/11
2.4.4.3MemoryMapWhenExecutingfromSRAM
When executing from the SRAM:
The utility ROM can be read as data, starting at 8000h of the data space . The utility ROM cannot be written .
Reading of flash memory is executed normally . Writing to flash memory requires the use of the utility ROM routines .
One page (byte access mode) or both pages (word access mode) of the flash memory can be accessed as data with
an offset of 0000h . For byte access mode, the page of flash accessed is determined by the CDA0 bit .
Figure 2-5 illustrates the mapping of the flash and utility ROM memory segments into data memory space when code
is executing from the SRAM memory segment .
Figure 2-5. Memory Map When Executing from SRAM
PROGRAM
SPACE
DATA SPACE
(BYTE MODE, CDA0 = 0)
DATA SPACE
(BYTE MODE, CDA0 = 1)
DATA SPACE
(WORD MODE)
FFFFh FFFFh FFFFh FFFFh
8FFFh
9FFFh 9FFFh
A3FFh
8FFFh
7FFFh
3FFFh
EXECUTING FROM
8000h
7FFFh
8000h
7FFFh
8000h
7FFFh
8000h
4000h
0000h 0000h 0000h 0000h
A000h
1K x 16
SRAM
4K x 16
UTILITY ROM
8K x 8
UTILITY ROM
8K x 8
UTILITY ROM
4K x 16
UTILITY ROM
32K x 8
LOWER HALF
(PAGE 0) OF
FLASH
32K x 8
UPPER HALF
(PAGE 1) OF
FLASH
32K x 16
FLASH
16K x 16
FLASH
(PAGE 1)
16K x 16
FLASH
(PAGE 0)