Maxim Integrated DS4830 Optical Microcontroller - Manual (Page 18)

DS4830 User’s Guide
18
2.4.4.2 – Memory Map When Executing from Utility ROM
When executing from the utility ROM:

Read and write operations of SRAM memory are executed normally.

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 8000h as determined by the CDA0 bit.
Figure 2-4 illustrates the mapping of the SRAM and flash memory segments into data memory space when code is
executing from the utility ROM memory segment.
Figure 2-4: Memory Map When Executing from Utility ROM