Common Flash Interface (CFI)
M29W640GH, M29W640GL, M29W640GT, M29W640GB
(1)
Table 33.
Address
Device geometry definition
Data
Description
Value
x16
x8
27h
4Eh
0017h
Device Size = 2n in number of bytes
8 Mbytes
28h
29h
50h
52h
0002h
0000h
x8, x16
Async.
Flash Device Interface Code description
2Ah
2Bh
54h
56h
0005h
0000h
Maximum number of bytes in multi-byte program or page =
2n
32 bytes
M29W640GH,
M29W640GL
0001h
0002h
1
2
Number of Erase Block Regions. It specifies the number of
regions containing contiguous Erase Blocks of the same
size.
2Ch
58h
M29W640GT,
M29W640GB
2Dh
2Eh
5Ah
5Ch
007Fh Region 1 Information
128
0000h Number of Erase Blocks of identical size = 007Fh+1
M29W640GH,
M29W640GL
2Fh
30h
5Eh
60h
0000h Region 1 Information
64Kbytes
8
0001h Block size in Region 1 = 0100h * 256 byte
2Dh
2Eh
5Ah
5Ch
0007h Region 1 Information
0000h Number of Erase Blocks of identical size = 0007h+1
M29W640GT,
M29W640GB
2Fh
30h
5Eh
60h
0020h Region 1 Information
8Kbyte
127
0000h Block size in Region 1 = 0020h * 256 byte
31h
32h
62h
64h
007Eh Region 2 Information
0000h Number of Erase Blocks of identical size= 007Eh+1
33h
34h
66h
68h
0000h Region 2 Information
64Kbytes
0001h Block size in Region 2 = 0100h * 256 byte
35h
36h
37h
38h
6Ah
6Ch
6Eh
70h
0000h Region 3 Information
M29W640GT,
M29W640GB
0000h Number of Erase Blocks of identical size=007Fh+1
0000h Region 3 Information
0
0
only
0000h Block size in Region 3 = 0000h * 256 byte
39h
3Ah
3Bh
3Ch
72h
74h
76h
78h
0000h Region 4 Information
0000h Number of Erase Blocks of Identical size=007Fh+1
0000h Region 4 Information
0
0
0000h Block size in Region 4 = 0000h * 256 byte
1. For Bottom Boot devices, Erase Block Region 1 is located from address 000000h to 007FFFh and Erase Block Region 2
from address 008000h to 3FFFFFh.
For Top Boot devices, Erase Block Region 1 is located from address 000000h to 3F7FFFh and Erase Block Region 2 from
address 3F8000h to 3FFFFFh.
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NUMONYX [ NUMONYX B.V ]
