STMicroelectronics switch/hub Brochure page 7

Flexible Memory Allocation
Flexible Memory Allocation
• 8051 Architecture uses a separate address space for code and for data
• Allocate dual banks of Flash to meet Application Demands
– The Decode PLD controls where Flash memory resides
• You decide how to split the Flash memory
Can use
EEPROM
Emulation
www.st.com/micropsd
Big Code
(complex
- OR -
algorithms)
nd nd
2 2 nd FLASH FLASH
2 FLASH
DATA
DATA
DATA
MAIN FLASH MAIN FLASH
MAIN FLASH
CODE CODE
CODE
Big Data
(printers, big
- OR -
GUI, tables)
nd nd
2 2 FLASH FLASH
nd
2 FLASH
CODE
CODE
CODE
MAIN FLASH MAIN FLASH
MAIN FLASH
DATA
DATA
DATA
All Code
(like typical
flash 8051s)
nd nd
2 2 nd FLASH FLASH
2 FLASH
CODE
CODE
CODE
MAIN FLASH
MAIN FLASH
MAIN FLASH
CODE CODE
CODE
7