M28W320FSU STMICROELECTRONICS [STMicroelectronics], M28W320FSU Datasheet - Page 5

• Manufacturer Part Number: M28W320FSU
• Description: 32Mbit (2Mb x16) and 64Mbit (4Mb x16) 3V Supply, Uniform Block, Secure Flash Memories
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

SUMMARY DESCRIPTION
The M28W320FSU and the M28W640FSU are 32
Mbit (2Mbit x 16) and 64 Mbit (4Mbit x 16) Secure
Flash memories. The devices can be erased elec-
trically at block level and programmed in-system
on a Word-by-Word basis using a 2.7V to 3.6V
V
V
12V V
customer programming.
The M28W320FSU and M28W640FSU feature 32
Mbits and 64 Mbits respectively and are divided
into thirty-two and sixty-four 64-KWord Uniform
blocks, respectively. Refer to
tailed description of the devices memory architec-
ture and map.
All devices are equipped with hardware and soft-
ware block protection features to avoid unwanted
program/erase (modify) or read of the Flash mem-
ory content:
The KRYPTO Security features are described in a
dedicated Application Note. Please contact STMi-
croelectronics for further details.
DD
DDQ
Hardware Protection:
–
Software Protection thanks to KRYPTO
Security Features:
–
–
supply for the circuitry and a 2.7V to 3.6V
supply for the Input/Output pins. An optional
PP
When V
protected against program or erase.
Modify Protection: volatile and non-
volatile.
Read Protection.
power supply is provided to speed up
PP
V
PPLK
all blocks are
Figure 5.
for a de-
Two registers are available for protection purpose:
The Protection Register is a 192 bit Protection
Register to increase the protection of a system de-
sign. The Protection Register is divided into a 64
bit segment and a 128 bit segment. The 64 bit seg-
ment contains a unique device number written by
ST, while the second one is one-time-programma-
ble by the user. The user programmable segment
can be permanently protected.
the Protection Register Memory Map.
The KRYPTO Protection Register is used to man-
age 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 STMi-
croelectronics 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.
Program and Erase commands are written to the
Command Interface of the memory. An on-chip
Program/Erase Controller takes care of the tim-
ings necessary for program and erase operations.
The end of a program or erase operation can be
detected and any error conditions identified. The
command set required to control the memory is
consistent with JEDEC standards.
All the devices are offered in a TBGA64 (10 x
13mm) package. In addition to the standard ver-
sion, the package is also available in Lead-free
version, in compliance with JEDEC Std J-STD-
020B, the ST ECOPACK 7191395 Specification,
and the RoHS (Restriction of Hazardous Sub-
stances) directive. The package is compliant with
Lead-free soldering processes.
All devices are supplied with all the bits erased
(set to ’1’).
The Protection Register
The KRYPTO Protection Register.
M28W320FSU, M28W640FSU
Figure
6., shows
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