M28W320CT Datasheet PDF - STMicroelectronics
| Part Number | M28W320CT | |
| Description | 32 Mbit 3V Supply Flash Memory | |
| Manufacturers | STMicroelectronics | |
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M28W320CT
M28W320CB
32 Mbit (2Mb x16, Boot Block)
3V Supply Flash Memory
FEATURES SUMMARY
s SUPPLY VOLTAGE
– VDD = 2.7V to 3.6V Core Power Supply
– VDDQ= 1.65V to 3.6V for Input/Output
– VPP = 12V for fast Program (optional)
s ACCESS TIME: 70, 85, 90,100ns
s PROGRAMMING TIME:
– 10µs typical
– Double Word Programming Option
s COMMON FLASH INTERFACE
– 64 bit Security Code
s MEMORY BLOCKS
– Parameter Blocks (Top or Bottom location)
– Main Blocks
s BLOCK LOCKING
– All blocks locked at Power Up
– Any combination of blocks can be locked
– WP for Block Lock-Down
s SECURITY
– 64 bit user Programmable OTP cells
– 64 bit unique device identifier
– One Parameter Block Permanently Lockable
s AUTOMATIC STAND-BY MODE
s PROGRAM and ERASE SUSPEND
s 100,000 PROGRAM/ERASE CYCLES per
BLOCK
s ELECTRONIC SIGNATURE
– Manufacturer Code: 20h
– Top Device Code, M28W320CT: 88BAh
– Bottom Device Code, M28W320CB: 88BBh
Figure 1. Packages
µBGA
µBGA47 (GB)
6.39 x 10.5mm
FBGA
TFBGA47 (ZB)
6.39 x 10.5mm
TSOP48 (N)
12 x 20mm
May 2002
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M28W320CT, M28W320CB
SUMMARY DESCRIPTION
The M28W320C is a 32 Mbit (2 Mbit x 16) non-vol-
atile Flash memory 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. VDDQ allows to drive the I/O pin down to
1.65V. An optional 12V VPP power supply is pro-
vided to speed up customer programming.
The device features an asymmetrical blocked ar-
chitecture. The M28W320C has an array of 71
blocks: 8 Parameter Blocks of 4 KWord and 63
Main Blocks of 32 KWord. M28W320CT has the
Parameter Blocks at the top of the memory ad-
dress space while the M28W320CB locates the
Parameter Blocks starting from the bottom. The
memory maps are shown in Figure 6, Block Ad-
dresses.
The M28W320C features an instant, individual
block locking scheme that allows any block to be
locked or unlocked with no latency, enabling in-
stant code and data protection. All blocks have
three levels of protection. They can be locked and
locked-down individually preventing any acciden-
tal programming or erasure. There is an additional
hardware protection against program and erase.
When VPP ≤ VPPLK all blocks are protected against
program or erase. 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 128 bit Protection Register
and a Security Block to increase the protection of
a system design. The Protection Register is divid-
ed into two 64 bit segments, the first one contains
a unique device number written by ST, while the
second one is one-time-programmable by the us-
er. The user programmable segment can be per-
manently protected. The Security Block,
parameter block 0, can be permanently protected
by the user. Figure 7, shows the Security Block
and Protection Register Memory Map.
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.
The memory is offered in TSOP48 (10 X 20mm),
µGBA47 (6.39 x 10.5mm, 0.75mm pitch) and
TFBGA47 (6.39 x 10.5mm, 0.75mm pitch) packag-
es and is supplied with all the bits erased (set to
’1’).
Figure 2. Logic Diagram
VDD VDDQ VPP
21
A0-A20
W
E
G
RP
WP
16
DQ0-DQ15
M28W320CT
M28W320CB
VSS
AI03521
Table 1. Signal Names
A0-A20
Address Inputs
DQ0-DQ15 Data Input/Output
E Chip Enable
G Output Enable
W Write Enable
RP Reset
WP Write Protect
VDD Core Power Supply
VDDQ
Power Supply for
Input/Output
VPP
Optional Supply Voltage for
Fast Program & Erase
VSS Ground
NC Not Connected Internally
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for M28W320CT electronic component. |
| Information | Total 30 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ M28W320CT.PDF Datasheet ] | |
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| Part Number | Description | MFRS |
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| M28W320CT | The function is 32 Mbit 3V Supply Flash Memory. STMicroelectronics | |
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