AT45DB321D-CCU Adesto Technologies, AT45DB321D-CCU Datasheet - Page 9

• Manufacturer Part Number: AT45DB321D-CCU
• Description: Flash 32M 2.7-3.6V, 66Mhz Serial Flash
• Manufacturer: Adesto Technologies

Specifications of AT45DB321D-CCU

• Rohs: yes
• Data Bus Width: 8 bit
• Memory Type: Data Flash
• Memory Size: 32 Mbit
• Architecture: Flexible, Uniform Erase
• Timing Type: Synchronous
• Interface Type: SPI
• Supply Voltage - Max: 3.6 V
• Supply Voltage - Min: 2.7 V
• Maximum Operating Current: 15 mA
• Operating Temperature: - 40 C to + 85 C
• Mounting Style: SMD/SMT
• Package / Case: BGA-24
• Factory Pack Quantity: 378

5.7
Table 5-2.
Chip Erase
The entire main memory can be erased at one time by using the chip erase command.
To execute the chip erase command, a four-byte command sequence, C7H, 94H, 80H, and 9AH, must be clocked into the
device. Since the entire memory array is to be erased, no address bytes need to be clocked into the device, and any data
clocked in after the opcode will be ignored. After the last bit of the opcode sequence has been clocked in, the CS pin can be
deasserted to start the erase process. The erase operation is internally self-timed, and should take place in a time of t
this time, the status register will indicate that the device is busy.
The chip erase command will not affect sectors that are protected or locked down; the contents of those sectors will remain
unchanged. Only those sectors that are not protected or locked down will be erased.
Note:
The WP pin can be asserted while the device is erasing, but protection will not be activated until the internal erase cycle
completes.
Table 5-3.
Figure 5-1. Chip Erase
Note:
CS
SI
PA12/
Command
Chip erase
A21
●
●
●
0
0
0
0
1
1
1
1
1.
Each transition
represents 8 bits
1.
PA11/
A20
●
●
●
0
0
0
0
1
1
1
1
Sector Erase Addressing
Refer to the errata regarding chip erase on
Chip Erase Command
Refer to the errata regarding chip erase on
(1)
Opcode
Byte 1
PA10/
A19
0
0
0
0
●
●
●
1
1
1
1
PA9/
A18
0
0
0
0
●
●
●
1
1
1
1
Opcode
Byte 2
PA8/
A17
0
0
0
1
●
●
●
0
0
1
1
Opcode
Byte 3
PA7/
A16
0
0
1
0
●
●
●
0
1
0
1
Opcode
PA6/
Byte 4
A15
Byte 1
X
X
●
●
●
X
X
X
X
page
C7H
page
0
0
51.
51.
PA5/
A14
X
X
●
●
●
X
X
X
X
0
0
PA4/
A13
0
0
X
X
●
●
●
X
X
X
X
Byte 2
94H
PA3/
A12
X
X
X
X
X
X
0
1
●
●
●
AT45DB321D [DATASHEET]
PA2/
A11
X
X
X
X
X
X
X
X
●
●
●
Byte 3
80H
PA1/
3597R–DFLASH–11/2012
A10
X
X
X
X
●
●
●
X
X
X
X
PA0/
A9
X
X
X
X
●
●
●
X
X
X
X
Byte 4
9AH
CE
Sector
. During
0a
0b
60
61
62
63
●
●
●
1
2
9