m28w320fcb STMicroelectronics, m28w320fcb Datasheet - Page 7

• Manufacturer Part Number: m28w320fcb
• Description: 32 Mbit 2mb X16, Boot Block 3v Supply Flash Memory
• Manufacturer: STMicroelectronics

M28W320FCT, M28W320FCB
1
Summary description
The M28W320FCT and M28W320FCB are 32 Mbit (2 Mbit x 16) non-volatile Flash
memories that can be erased electrically at the block level and programmed in-system on a
Word-by-Word basis. These operations can be performed using a single low voltage (2.7 to
3.6V) supply. V
supply is provided to speed up customer programming.
The devices feature an asymmetrical blocked architecture. They have an array of 71 blocks:
8 Parameter Blocks of 4 KWord and 63 Main Blocks of 32 KWord. M28W320FCT has the
Parameter Blocks at the top of the memory address space while the M28W320FCB locates
the Parameter Blocks starting from the bottom. The memory maps are shown in
Block
Both devices feature an instant, individual block locking scheme that allows any block to be
locked or unlocked with no latency, enabling instant code and data protection. All blocks
have three levels of protection. They can be locked and locked-down individually preventing
any accidental programming or erasure. There is an additional hardware protection against
program and erase. When V
All blocks are locked at Power Up.
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.
The device includes a Protection Register to increase the protection of a system design.
The Protection Register is divided into two segments, the first is a 64 bit area which contains
a unique device number written by ST, while the second is a 128 bit area, one-time-
programmable by the user. The user programmable segment can be permanently protected.
Figure
Program and Erase commands are written to the Command Interface of the memory. An on-
chip Program/Erase Controller takes care of the timings 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.
The memory is offered in TSOP48 (10 X 20mm) and TFBGA47 (6.39 x 6.37mm, 0.75mm
pitch) packages and is supplied with all the bits erased (set to ’1’).
In order to meet environmental requirements, ST offers the M28W320FCT and
M28W320FCB in ECOPACK
of second Level Interconnect is marked on the package and on the inner box label, in
compliance with JEDEC Standard JESD97. The maximum ratings related to soldering
conditions are also marked on the inner box label.
ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com.
Addresses.
5, shows the Protection Register Memory Map.
DDQ
allows to drive the I/O pin down to 1.65V. An optional 12V V
PP
®
packages.ECOPACK packages are Lead-free. The category
≤ V
PPLK
all blocks are protected against program or erase.
Summary description
PP
Figure 4:
power
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