AT45DB021D-SH-T Atmel, AT45DB021D-SH-T Datasheet - Page 36

• Manufacturer Part Number: AT45DB021D-SH-T
• Description: IC FLASH 2MBIT 66MHZ 8SOIC
• Manufacturer: Atmel

Specifications of AT45DB021D-SH-T

• Format - Memory: FLASH
• Memory Type: DataFLASH
• Memory Size: 2M (1024 pages x 264 bytes)
• Speed: 66MHz
• Interface: SPI, RapidS
• Voltage - Supply: 2.7 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 8-SOIC (5.3mm Width), 8-SOP, 8-SOEIAJ
• Cell Type: NOR
• Density: 2Mb
• Access Time (max): 6ns
• Interface Type: Serial (SPI)
• Boot Type: Not Required
• Address Bus: 1b
• Operating Supply Voltage (typ): 3/3.3V
• Operating Temp Range: -40C to 85C
• Package Type: SOIC EIAJ
• Program/erase Volt (typ): 2.7 to 3.6V
• Sync/async: Synchronous
• Operating Temperature Classification: Industrial
• Operating Supply Voltage (min): 2.7V
• Operating Supply Voltage (max): 3.6V
• Word Size: 8b
• Number Of Words: 256K
• Supply Current: 15mA
• Mounting: Surface Mount
• Pin Count: 8
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

18.
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Figure 17-11. Buffer to Main Memory Page Program (Data from Buffer Programmed into Flash Page)
Read Operations
The following block diagram and waveforms illustrate the various read sequences available.
Figure 18-1. Main Memory Page Read
SI (INPUT)
Atmel AT45DB021D
SO (OUTPUT)
SI (INPUT)
CS
MAIN MEMORY
PAGE (256-/264-BYTES)
BUFFER (256-/264-BYTES)
CS
PAGE TO
represents 8 bits
BUFFER
BUFFER
Each transition
READ
CMD
CMD
FLASH MEMORY ARRAY
ADDRESS FOR BINARY PAGE SIZE
A16
PA8-7
I/O INTERFACE
SO
PA6-0, BA8
A15-A8
MAIN MEMORY
PAGE READ
PA9-7
Starts self-timed erase/program operation
A17-A8 + 8 DON'T CARE BITS
A7-A0
BINARY PAGE SIZE
BA7-0
PA6-0, X
X
4 Dummy Bytes
XXXX XX
n = 1st byte read
n+1 = 2nd byte read
X
n
n+1
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