at89c51re2-slsem ATMEL Corporation, at89c51re2-slsem Datasheet - Page 31

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

On-Chip ROM bootloader
7663B–8051–03/07
FFFFh
7FFFh
Logical MCU
Address
8000h
0000h
Bank 0
Physical
Address
0FFFFh
07FFFh
08000h
00000h
FFFFh
Logical MCU
Address
8000h
The On-chip ROM bootloader (RM0) is enable only for ISP operations after reset (boot-
loader execution). The RM0 memory area belongs to a logical addressable memory
space called ‘Bank Boot’.
RM0 cannot be ativated from the On-chip flash memory. It means that it is not not
possible activate the Bank Boot area by software (it prevents any RM0 execution and
flash corruption from the user application).
RM0 logical area consists in an independant code execution memory area of 4K bytes
starting at logical 0x0000 address (it allows the use of the interrupts in the bootloader
execution).
Bank 1
17FFFh
On-Chip ROM memory (RM0)
On-Chip flash code memory
External code memory
Physical
Address
10000h
FFFFh
Logical MCU
Address
8000h
Bank 2
1FFFFh
Physical
Address
18000h
Logical MCU
Address
FFFFh
8000h
Bank 3
(Ext)
Logical MCU
Address
1000h
0000h
Bank
BOOT
ROM
Address
1000h
0000h
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