AM29DL640D AMD, AM29DL640D Datasheet - Page 14

• Manufacturer Part Number: AM29DL640D
• Description: 64 Megabit CMOS 3.0 Volt-only / Simultaneous Read/Write Flash Memory
• Manufacturer: AMD

Note: The address range is A21:A-1 in byte mode (BYTE#=V
Autoselect Mode
The autoselect mode provides manufacturer and de-
vice identification, and sector protection verification,
through identifier codes output on DQ7–DQ0. This
mode is primarily intended for programming equip-
ment to automatically match a device to be pro-
grammed with its corresponding programm ing
algorithm. However, the autoselect codes can also be
accessed in-system through the command register.
When using programming equipment, the autoselect
mode requires V
Address pins A6, A1, and A0 must be as shown in
Table 3. In addition, when verifying sector protection,
the sector address must appear on the appropriate
highest order address bits (see Table 2). Table 3
shows the remaining address bits that are don’t care.
When all necessary bits have been set as required,
the programming equipment may then read the corre-
14
Bank 4
Bank
Sector
SA119
SA120
SA121
SA122
SA123
SA124
SA125
SA126
SA127
SA128
SA129
SA130
SA131
SA132
SA133
SA134
SA135
SA136
SA137
SA138
SA139
SA140
SA141
ID
(8.5 V to 12.5 V) on address pin A9.
Sector Address
Table 2. Am29DL640D Sector Architecture (Continued)
1110000xxx
1110001xxx
1110010xxx
1110100xxx
1110101xxx
1110011xxx
1110110xxx
1110111xxx
1111000xxx
1111001xxx
1111010xxx
1111011xxx
1111100xxx
1111101xxx
1111111000
1111111001
1111111010
1111111011
1111111100
1111111101
1111110xxx
1111111110
1111111111
A21–A12
A D V A N C E
(Kbytes/Kwords)
Sector Size
64/32
64/32
64/32
64/32
64/32
64/32
64/32
64/32
64/32
64/32
64/32
64/32
64/32
64/32
64/32
IL
8/4
8/4
8/4
8/4
8/4
8/4
8/4
8/4
Am29DL640D
) or A21:A0 in word mode (BYTE#=V
I N F O R M A T I O N
sponding identifier code on DQ7–DQ0. However, the
autoselect codes can also be accessed in-system
through the command register, for instances when the
Am29DL640 is erased or programmed in a system
without access to high voltage on the A9 pin. The
command sequence is illustrated in Table 9. Impor-
tant Note: In the Command Autoselect mode, the
Bank Addresses (A21, A20, and A19) must be
pointing to a specific bank during the third write
cycle of the autoselect Command. Then the Au-
toselect data can be read from the bank while
array data can still be read from the other bank.
To access the autoselect codes in-system, the host
system can issue the autoselect command via the
command register, as shown in Table 9. This method
does not require V
mand Sequence section for more information.
7C0000h–7CFFFFh
7D0000h–7DFFFFh
7FC000h–7FDFFFh
7A0000h–7AFFFFh
7B0000h–7BFFFFh
7E0000h–7EFFFFh
7FA000h–7FBFFFh
7FE000h–7FFFFFh
700000h–70FFFFh
710000h–71FFFFh
720000h–72FFFFh
730000h–73FFFFh
740000h–74FFFFh
750000h–75FFFFh
760000h–76FFFFh
770000h–77FFFFh
780000h–78FFFFh
790000h–79FFFFh
7F0000h–7F1FFFh
7F2000h–7F3FFFh
7F4000h–7F5FFFh
7F6000h–7F7FFFh
7F8000h–7F9FFFh
Address Range
(x8)
ID
IH
).
. Refer to the Autoselect Com-
3C0000h–3C7FFFh
3C8000h–3CFFFFh
3D0000h–3D7FFFh
3D8000h–3DFFFFh
3FB000h–3FBFFFh
3FC000h–3FCFFFh
3FD000h–3FDFFFh
3FE000h–3FEFFFh
3A0000h–3A7FFFh
3A8000h–3AFFFFh
3B0000h–3B7FFFh
3B8000h–3BFFFFh
3E0000h–3E7FFFh
3E8000h–3EFFFFh
3FA000h–3FAFFFh
3FF000h–3FFFFFh
388000h–38FFFFh
398000h–39FFFFh
3F0000h–3F7FFFh
3F8000h–3F8FFFh
3F9000h–3F9FFFh
380000h–387FFFh
390000h–397FFFh
Address Range
(x16)