AT45DB642-TI Atmel, AT45DB642-TI Datasheet - Page 19

• Manufacturer Part Number: AT45DB642-TI
• Description: IC FLASH 64MBIT 20MHZ 40TSOP
• Manufacturer: Atmel

Specifications of AT45DB642-TI

• Format - Memory: FLASH
• Memory Type: DataFLASH
• Memory Size: 64M (8192 pages x 1056 bytes)
• Speed: 20MHz Serial/5MHz Parallel
• Interface: Parallel/Serial
• Voltage - Supply: 2.7 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 40-TSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Write Operations
The following block diagram and waveforms illustrate the various write sequences available.
Main Memory Page Program through Buffers
Buffer Write
Buffer to Main Memory Page Program (Data from Buffer Programmed into Flash Page)
1638F–DFLSH–09/02
represents 8 bits
Each transition
SI or I/O7 - I/O0
SI or I/O7 - I/O0
(INPUT)
(INPUT)
CS
CS
PAGE PROGRAM
MAIN MEMORY
SI or I/O7 - I/O0
PAGE (1056 BYTES)
BUFFER 1 (1056 BYTES)
BUFFER 1 TO
BUFFER 1
CMD
(INPUT)
WRITE
CMD
CS
PA12-5
SI
X
PA4-0, BFA10-8
X···X, BFA10-8
FLASH MEMORY ARRAY
CMD
MAIN MEMORY PAGE
PROGRAM THROUGH
BUFFER 1
I/O INTERFACE
THROUGH BUFFER 2
PAGE PROGRAM
MAIN MEMORY
PA12-5
BFA7-0
BFA7-0
Starts self-timed erase/program operation
PA4-0, XXX
n
I/O7 - I/O0
n
BUFFER 2 (1056 BYTES)
n+1
X···X
· Completes writing into selected buffer
n+1
BUFFER 2 TO
MAIN MEMORY
PAGE PROGRAM
BUFFER 2
WRITE
· Completes writing into selected buffer
· Starts self-timed erase/program operation
n = 1st byte read
n+1 = 2nd byte read
Last Byte
AT45DB642
Last Byte
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