
23
Am54BDS128AG
July 23, 2002
ADV ANCE
I N FO RMAT I O N
FLASH COMMAND DEFINITIONS
Writing specific address and data commands or se-
quences into the command register initiates device op-
page 31 defines the valid register command se-
quences. Writing incorrect address and data values or
writing them in the improper sequence resets the de-
vice to reading array data.
Refer to the AC Characteristics section for timing dia-
grams.
Reading Array Data
The device is automatically set to reading array data
after device power-up. No commands are required to
retrieve data in asynchronous mode. Each bank is
ready to read array data after completing an Embed-
ded Program or Embedded Erase algorithm.
After the device accepts an Erase Suspend command,
the co rresponding bank enters the eras e-su s -
pend-read mode, after which the system can read
data from any non-erase-suspended sector within the
same bank. After completing a programming operation
in the Erase Suspend mode, the system may once
again read array data with the same exception. See
The system must issue the reset command to return a
bank to the read (or erase-suspend-read) mode if DQ5
Bank A
SA99
32K words
300000h-307FFFh
SA100
32K words
308000h-30FFFFh
SA101
32K words
310000h-317FFFh
SA102
32K words
318000h-31FFFFh
SA103
32K words
320000h-327FFFh
SA104
32K words
328000h-32FFFFh
SA105
32K words
330000h-337FFFh
SA106
32K words
338000h-33FFFFh
SA107
32K words
340000h-347FFFh
SA108
32K words
348000h-34FFFFh
SA109
32K words
350000h-357FFFh
SA110
32K words
358000h-35FFFFh
SA111
32K words
360000h-367FFFh
SA112
32K words
368000h-36FFFFh
SA113
32K words
370000h-377FFFh
SA114
32K words
378000h-37FFFFh
SA115
32K words
380000h-387FFFh
SA116
32K words
388000h-38FFFFh
SA117
32K words
390000h-397FFFh
SA118
32K words
398000h-39FFFFh
SA119
32K words
3A0000h-3A7FFFh
SA120
32K words
3A8000h-3AFFFFh
SA121
32K words
3B0000h-3B7FFFh
SA122
32K words
3B8000h-3BFFFFh
SA123
32K words
3C0000h-3C7FFFh
SA124
32K words
3C8000h-3CFFFFh
SA125
32K words
3D0000h-3D7FFFh
SA126
32K words
3D8000h-3DFFFFh
SA127
32K words
3E0000h-3E7FFFh
SA128
32K words
3E8000h-3EFFFFh
SA129
32K words
3F0000h-3F7FFFh
SA130
8K words
3F8000h-3F9FFFh
SA131
8K words
3FA000h-3FBFFFh
SA132
8K words
3FC000h-3FDFFFh
SA133
8K words
3FE000h-3FFFFFh
Table 7.
Am29BDS640G Sector Address Table
Sector
Sector Size
(x16) Address Range