Datasheet

41
AT89C51AC3
4383D–8051–02/08
Figure 24. Flash Memory Architecture with ENBOOT=0 (user modemode)
FFFFh
64K Bytes
FM0
0000h
Hardware Security (1 byte)
Column Latches (128 Bytes)
Extra Row (128 Bytes)
2K Bytes
Flash memory
FM1
boot space
FFFFh
F800h
FM1 mapped between FFFFh and
F800h when bit ENBOOT is set in
AUXR1 register
F800h
Memory space not accessible