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AT49BV008AT-12TC Datasheet

  • AT49BV008AT-12TC

  • 8-Megabit 1M x 8/ 512K x 16 CMOS Flash Memory

  • 16頁

  • ATMEL   ATMEL

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Features
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
2.7V to 3.6V Read/Write Operation
Fast Read Access Time - 120 ns
Internal Erase/Program Control
Sector Architecture
鈥?One 8K Words (16K bytes) Boot Block with Programming Lockout
鈥?Two 4K Words (8K bytes) Parameter Blocks
鈥?One 496K Words (992K bytes) Main Memory Array Block
Fast Sector Erase Time - 10 seconds
Byte-by-Byte or Word-By-Word Programming - 30
碌
s Typical
Hardware Data Protection
DATA Polling For End Of Program Detection
Low-Power Dissipation
鈥?25 mA Active Current
鈥?50
碌
A CMOS Standby Current
Typical 10,000 Write Cycles
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鈥?/div>
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Description
The AT49BV008A(T) and AT49BV8192A(T) are 3-volt, 8-megabit Flash Memories
organized as 1,048,576 words of 8 bits each or 512K words of 16 bits each. Manufac-
tured with Atmel鈥檚 advanced nonvolatile CMOS technology, the devices offer access
times to 120 ns with power dissipation of just 67 mW at 2.7V read. When deselected,
the CMOS standby current is less than 50
碌A.
The device contains a user-enabled 鈥渂oot block鈥?protection feature. Two versions of
the feature are available: the AT49BV008A/8192A locates the boot block at lowest
order addresses (鈥渂ottom boot鈥?; the AT49BV008AT/8192AT locates it at highest
order addresses (鈥渢op boot鈥?.
To allow for simple in-system reprogrammability, the AT49BV008A(T)/8192A(T) does
not require high input voltages for programming. Reading data out of the device is
similar to reading from an EPROM; it has standard CE, OE, and WE inputs to avoid
bus contention. Reprogramming the AT49BV008A(T)/8192A(T) is performed by first
erasing a block of data and then programming on a byte-by-byte or word-by-word
basis.
(continued)
8-Megabit
(1M x 8/
512K x 16)
CMOS Flash
Memory
AT49BV008A
AT49BV008AT
AT49BV8192A
AT49BV8192AT
Preliminary
Pin Configurations
Pin Name
A0 - A18
CE
OE
WE
RESET
RDY/BUSY
VPP
I/O0 - I/O14
I/O15 (A-1)
BYTE
NC
Function
Addresses
Chip Enable
Output Enable
Write Enable
Reset
Ready/Busy Output
Optional Power Supply for Faster
Program/Erase Operations
Data Inputs/Outputs
I/O15 (Data Input/Output, Word Mode)
A-1 (LSB Address Input, Byte Mode)
Selects Byte or Word Mode
No Connect
Rev. 1049C鈥?9/98
1

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