6.0 FUNCTIONAL BLOCK DESCRIPTIONS
6.1 MCU
The 64K memory map is as follows from the 8051's viewpoint:
6.1.1 MCU MEMORY MAP: CODE SPACE
The 8051 has a single flat 64K Code space. External memory requires 80ns access times from Address to Data and
less than 80ns output enable access times, assuming the use of the nMEMR signal as OE on the memory.
Table 2 - MCU Code Memory Map
8051 ADDRESS
CODE SPACE
ACCESS
0x0700-0xFFFF
Fixed Memory
External Program
Memory
0x0400-0x06FF
0x0000-0x03FF
768 Bytes of Fixed 16k FLASH Page
OR
768 Bytes of Internal SRAM for program execution
(see bit 7 of the UTIL_CFG register for more
information)
External Program
Memory
OR
Internal Program
SRAM
Fixed Memory
External Program
Memory
8051 MCU External Code Address
Space
0xFFFF
0x0700
Internal 768 Byte
SRAM or External
Memory
0x0400
0x0000
FIGURE 1 - MCU TO EXTERNAL CODE SPACE MAP
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Rev. 03/25/2002
PRELIMINARY
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