AT49BV002A-70PI Atmel, AT49BV002A-70PI Datasheet - Page 2

• Manufacturer Part Number: AT49BV002A-70PI
• Description: IC FLASH 2MBIT 70NS 32DIP
• Manufacturer: Atmel

Specifications of AT49BV002A-70PI

• Format - Memory: FLASH
• Memory Type: FLASH
• Memory Size: 2M (256K x 8)
• Speed: 70ns
• Interface: Parallel
• Voltage - Supply: 2.7 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-DIP (0.600", 15.24mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Block Diagram
2
AT49BV002A(N)(T)
When the device is deselected, the CMOS standby current is less than 50 µA. For the
AT49BV002AN(T) pin 1 for the DIP and PLCC packages and pin 9 for the TSOP package are
no connect pins. To allow for simple in-system reprogrammability, the AT49BV002A(N)(T)
does not require high input voltages for programming. Five-volt-only commands determine the
read and programming operation of the device. 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 AT49BV002A(N)(T) is performed by erasing a block of data and then pro-
gramming on a byte by byte basis. The byte programming time is a fast 30 s. The end of a
program cycle can be optionally detected by the DATA polling feature. Once the end of a byte
program cycle has been detected, a new access for a read or program can begin. The typical
number of program and erase cycles is in excess of 10,000 cycles.
The device is erased by executing the erase command sequence; the device internally con-
trols the erase operations. There are two 8K byte parameter block sections, four main memory
blocks, and one boot block.
The device has the capability to protect the data in the boot block; this feature is enabled by a
command sequence. The 16K-byte boot block section includes a reprogramming lock out fea-
ture to provide data integrity. The boot sector is designed to contain user secure code, and
when the feature is enabled, the boot sector is protected from being reprogrammed.
In the AT49BV002AN(T), once the boot block programming lockout feature is enabled, the
contents of the boot block are permanent and cannot be changed. In the AT49BV002A(T),
once the boot block programming lockout feature is enabled, the contents of the boot block
cannot be changed with input voltage levels of 5.5 volts or less.
ADDRESS
INPUTS
RESET
GND
VCC
WE
OE
CE
Y DECODER
X DECODER
CONTROL
LOGIC
DATA INPUTS/OUTPUTS
DATA LATCHES
AT49BV002A(N)
INPUT/OUTPUT
MAIN MEMORY
MAIN MEMORY
MAIN MEMORY
MAIN MEMORY
BOOT BLOCK
PARAMETER
PARAMETER
(64K BYTES)
(64K BYTES)
(64K BYTES)
(32K BYTES)
(16K BYTES)
(8K BYTES)
(8K BYTES)
PROGRAM
Y-GATING
I/O7 - I/O0
BUFFERS
BLOCK 4
BLOCK 3
BLOCK 2
BLOCK 1
BLOCK 2
BLOCK 1
8
30000
2FFFF
20000
10000
0FFFF
08000
07FFF
06000
05FFF
04000
03FFF
3FFFF
1FFFF
00000
DATA INPUTS/OUTPUTS
AT49BV002A(N)T
INPUT/OUTPUT
DATA LATCHES
MAIN MEMORY
MAIN MEMORY
MAIN MEMORY
MAIN MEMORY
BOOT BLOCK
PARAMETER
PARAMETER
(16K BYTES)
(32K BYTES)
(64K BYTES)
(64K BYTES)
(64K BYTES)
(8K BYTES)
(8K BYTES)
PROGRAM
Y-GATING
I/O7 - I/O0
BUFFERS
BLOCK 1
BLOCK 2
BLOCK 1
BLOCK 2
BLOCK 3
BLOCK 4
8
3353D–FLASH–8/03
3FFFF
3C000
3BFFF
3A000
39FFF
38000
37FFF
30000
2FFFF
20000
1FFFF
10000
0FFFF
00000