at45db021a ATMEL Corporation, at45db021a Datasheet - Page 13

• Manufacturer Part Number: at45db021a
• Description: 2-megabit 2.7-volt Only Serial Dataflash
• Manufacturer: ATMEL Corporation

Reset Timing (Inactive Clock Polarity Low Shown)
Note:
Command Sequence for Read/Write Operations (except Status Register Read)
Notes:
The CS signal should be in the high state before the RESET signal is deasserted.
1. “r” designates bits reserved for larger densities.
2. It is recommended that “r” be a logical “0” for densities of 2M bits or smaller.
3. For densities larger than 2M bits, the “r” bits become the most significant Page Address bit for the appropriate density.
RESET
SCK
CS
SO
SI
MSB
HIGH IMPEDANCE
larger densities
Reserved for
SI
r r r r r X X X
CMD
Page Address
(PA9-PA0)
X X X X X X X X
8 bits
8 bits
(BA8-BA0/BFA8-BFA0)
Byte/Buffer Address
X X X X X X X X
8 bits
tRST
tREC
HIGH IMPEDANCE
LSB
tCSS
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