M28W640FSU70ZA6 Micron Technology Inc, M28W640FSU70ZA6 Datasheet - Page 6

• Manufacturer Part Number: M28W640FSU70ZA6
• Manufacturer: Micron Technology Inc

Specifications of M28W640FSU70ZA6

• Cell Type: NOR
• Density: 64Mb
• Access Time (max): 70ns
• Interface Type: Parallel
• Address Bus: 22b
• Operating Supply Voltage (typ): 3/3.3V
• Operating Temp Range: -40C to 85C
• Package Type: TBGA
• Sync/async: Asynchronous
• Operating Temperature Classification: Industrial
• Operating Supply Voltage (min): 2.7V
• Operating Supply Voltage (max): 3.6V
• Word Size: 16b
• Number Of Words: 4M
• Supply Current: 18mA
• Mounting: Surface Mount
• Pin Count: 64
• Lead Free Status / Rohs Status: Not Compliant

Description
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Description
The M28W320FST, M28W320FSB, and M28W320FSU are 32 Mbit (2 Mbit × 16) Secure
Flash memories; while the M28W640FST, M28W640FSB, and M28W640FSU are 64 Mbit
(4 Mbit × 16). In the present datasheet, the M28W320FST and M28W320FSB will be
referred to as M28W320FS, and the M28W640FST and M28W640FSB as M28W640FS.
The devices can be erased electrically at block level and programmed in-system on a Word-
by-Word basis using a 2.7 V to 3.6 V V
supply for the Input/Output pins. An optional 12 V V
customer programming.
The M28W320FS and M28W640FS are boot block Flash memories. They have an
asymmetrical block architecture with 4 KWord Parameter Blocks and 32 KWord Main
Blocks. The M28W320FST and M28W640FST have the Parameter Blocks at the top of the
memory address space while the M28W320FSB and M28W640FSB locate the Parameter
Blocks starting from the bottom. Refer to
detailed description of the devices memory architecture and map.
The M28W320FSU and M28W640FSU are uniform block Flash memories. They are divided
into thirty-two and sixty-four 64-KWord Uniform blocks, respectively. Refer to
detailed description of the devices memory architecture and map.
All devices are equipped with hardware and software block protection features to avoid
unwanted program/erase (modify) or read of the Flash memory content:
The Krypto Security features are described in a dedicated Application Note. Please contact
STMicroelectronics for further details.
Two registers are available for protection purpose:
The Protection Register is a 192 bit Protection Register to increase the protection of a
system design. The Protection Register is divided into a 64 bit segment and a 128 bit
segment. The 64 bit segment contains a unique device number written by ST, while the
second one is one-time-programmable by the user. The user programmable segment can
be permanently protected.
The Krypto Protection Register is used to manage the Modify and Read protection modes. It
also features a Device Authentication mechanism. The Krypto Protection Register is
described in a dedicated Application Note. Please contact STMicroelectronics for further
details.
Each block can be erased separately. Erase can be suspended in order to perform either
read or program in any other block and then resumed. Program can be suspended to read
data in any other block and then resumed. Each block can be programmed and erased over
100,000 cycles.
Hardware Protection:
–
Software Protection thanks to Krypto™ Security Features:
–
–
The Protection Register
The Krypto Protection Register.
When V
Modify Protection: volatile and non-volatile.
Read Protection.
PP
V
PPLK
Figure
all blocks are protected against program or erase.
10, shows the Protection Register Memory Map.
DD
Table
supply for the circuitry and a 2.7 V to 3.6 V V
1,
Figure
PP
power supply is provided to speed up
7,
Figure 8
M28WxxxFS, M28WxxxFSU
and
Figure 9
Figure 7
for a
for a
DDQ