M25P20
Memory organization
5
Memory organization
The memory is organized as:
●
●
●
262,144 bytes (8 bits each)
4 sectors (512 Kbits, 65536 bytes each)
1024 pages (256 bytes each).
Each page can be individually programmed (bits are programmed from 1 to 0). The device is
Sector or Bulk Erasable (bits are erased from 0 to 1) but not Page Erasable.
Table 3.
Memory Organization
Sector
Address Range
3
2
1
0
30000h
20000h
10000h
00000h
3FFFFh
2FFFFh
1FFFFh
0FFFFh
Figure 6.
Block Diagram
HOLD
W
High Voltage
Generator
Control Logic
S
C
D
Q
I/O Shift Register
Status
Register
Address Register
and Counter
256 Byte
Data Buffer
3FFFFh
30000h
Size of the
read-only
memory area
20000h
10000h
00000h
000FFh
256 Bytes (Page Size)
X Decoder
AI04079
15/50
NUMONYX [ NUMONYX B.V ]
