at89c51re2-slsem ATMEL Corporation, at89c51re2-slsem Datasheet - Page 21

• Manufacturer Part Number: at89c51re2-slsem
• Description: At89c51re2 8-bit Flash Microcontroller
• Manufacturer: ATMEL Corporation

Memory Architecture
Physical memory
organisation
Figure 5. Physical memory organisation
7663B–8051–03/07
Fuse Configuration Byte(1 byte)
Hardware Security (1 byte)
Column Latches (128 bytes)
1FFFFh
00000h
FCB
HSB
Flash memory
128K bytes
AT89C51RE2 features several on-chip memories:
•
•
•
user space
FM0
Flash memory :
containing 128 Kbytes of program memory (user space) organized into 128 bytes
pages.
Boot ROM:
4K bytes for boot loader.
8K bytes internal XRAM
256 bytes
4K bytes
8K bytes
XRAM
ROM
IRAM
RM0
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