AT45DB321E-SHF-B View Datasheet(PDF) - Unspecified
Part Name
Description
MFG CO.
AT45DB321E-SHF-B
Unspecified
'AT45DB321E-SHF-B' PDF : 72 Pages View PDF
Table 6-1. Block Erase Addressing
PA12/
A21
0
0
0
0
•
•
•
1
1
1
1
PA11/
A20
0
0
0
0
•
•
•
1
1
1
1
PA10/
A19
0
0
0
0
•
•
•
1
1
1
1
PA9/
A18
0
0
0
0
•
•
•
1
1
1
1
PA8/
A17
0
0
0
0
•
•
•
1
1
1
1
PA7/
A16
0
0
0
0
•
•
•
1
1
1
1
PA6/
A15
0
0
0
0
•
•
•
1
1
1
1
PA5/
A14
0
0
0
0
•
•
•
1
1
1
1
PA4/
A13
0
0
1
1
•
•
•
0
0
1
1
PA3/
A12
0
1
0
1
•
•
•
0
1
0
1
PA2/
A11
X
X
X
X
•
•
•
X
X
X
X
PA1/
A10
X
X
X
X
•
•
•
X
X
X
X
PA0/
A9
X
X
X
X
•
•
•
X
X
X
X
Block
0
1
2
3
•
•
•
1020
1021
1022
1023
6.8 Sector Erase
The Sector Erase command can be used to individually erase any sector in the main memory.
The main memory array is comprised of 64 sectors, and only one sector can be erased at a time. To perform an erase of
Sector 0a or Sector 0b with the standard DataFlash page size (528 bytes), an opcode of 7Ch must be clocked into the
device followed by three address bytes comprised of one dummy bit, 10 page address bits (PA12 - PA3), and
13 dummy bits. To perform a Sector 1-63 erase, an opcode of 7Ch must be clocked into the device followed by three
address bytes comprised of one dummy bit, six page address bits (PA12 - PA7), and 17 dummy bits.
To perform a Sector 0a or Sector 0b erase with the binary page size (512 bytes), an opcode of 7Ch must be clocked into
the device followed by three address bytes comprised of two dummy bits, 10 page address bits (A21 - A12), and
12 dummy bits. To perform a Sector 1-63 erase, an opcode of 7Ch must be clocked into the device followed by two
dummy bits, six page address bits (A21 - A16), and 16 dummy bits.
The page address bits are used to specify any valid address location within the sector to be erased. When a
low-to high transition occurs on the CS pin, the device will erase the selected sector. The erase operation is internally
self-timed and should take place in a maximum time of tSE. During this time, the RDY/BUSY bit in the Status Register will
indicate that the device is busy.
The device also incorporates an intelligent algorithm that can detect when a byte location fails to erase properly. If an
erase error arises, it will be indicated by the EPE bit in the Status Register.
AT45DB321E 13
8784E–DFLASH–10/2013
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