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| 型号： | MT28C3224P20 |
| 厂商： | Micron Technology, Inc. |
| 元件分类： | DRAM |
| 英文描述： | FLASH AND SRAM COMBO MEMORY |
| 中文描述： | 闪存和SRAM式内存 |
| 文件页数： | 2/42页 |
| 文件大小： | 498K |
| 代理商： | MT28C3224P20 |
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2 Meg x 16 Page Flash 256K x 16 SRAM Combo Memory
MT28C3224P20_3.p65 – Rev. 3, Pub. 7/02
Micron Technology, Inc., reserves the right to change products or specifications without notice.
2002, Micron Technology, Inc.
2 MEG x 16 PAGE FLASH
256K x 16 SRAM COMBO MEMORY
ADVANCE
Table 1
Cross Reference for Abbreviated Device Marks
PRODUCT
MARKING
FW448
FW446
FW449
FW450
SAMPLE
MARKING
FX448
FX446
FX449
FX450
MECHANICAL
SAMPLE MARKING
FY448
FY446
FY449
FY450
PART NUMBER
MT28C3224P20FL-80 BET
MT28C3224P20FL-80 TET
MT28C3224P18FL-85 BET
MT28C3224P18FL-85 TET
GENERAL DESCRIPTION
The MT28C3224P20 and MT28C3224P18 combi-
nation Flash and SRAM memory devices provide a com-
pact, low-power solution for systems where PCB real
estate is at a premium. The dual-bank Flash devices
are high-performance, high-density, nonvolatile
memory with a revolutionary architecture that can sig-
nificantly improve system performance.
This new architecture features:
A two-memory-bank configuration supporting
dual-bank operation;
A high-performance bus interface providing a fast
page data transfer; and
A conventional asynchronous bus
interface.
The devices also provide soft protection for blocks
by configuring soft protection registers with dedicated
command sequences. For security purposes, dual 64-
bit chip protection registers are provided.
The embedded WORD WRITE and BLOCK ERASE
functions are fully automated by an on-chip write state
machine (WSM). The WSM simplifies these operations
and relieves the system processor of secondary tasks.
An on-chip status register, one for each bank, can be
used to monitor the WSM status to determine the
progress of a PROGRAM/ERASE command.
The erase/program suspend functionality allows
compatibility with existing EEPROM emulation soft-
ware packages.
The devices take advantage of a dedicated power
source for the Flash memory (F_V
CC
) and a dedicated
power source for the SRAM memory (S_V
CC
), both at
1.70V–2.20V for optimized power consumption and im-
proved noise immunity. A dedicated I/O power supply
(V
CC
Q) is provided with an extended range (1.70V–
2.20V), to allow a direct interface to most common logic
controllers and to ensure improved noise immunity.
The separate S_V
CC
pin for the SRAM provides data
retention capability when required. The data reten-
tion S_V
CC
is specified as low as 1.0V. The
MT28C3224P20 and MT28C3224P18 devices support
two V
PP
voltage ranges, an in-circuit voltage of 0.9V–
2.2V and a production compatibility voltage of 12V ±5%.
The 12V ±5% V
PP
2
is supported for a maximum of 100
cycles and 10 cumulative hours.
The MT28C3224P20 and MT28C3224P18 devices
contain an asynchronous 4Mb SRAM organized as 256K-
words by 16 bits. These devices are fabricated using an
advanced CMOS process and high-speed/ultra-low-
power circuit technology.
The devices are packaged in a 66-ball FBGA pack-
age with 0.80mm pitch.
ARCHITECTURE AND MEMORY
ORGANIZATION
The Flash memory contains two separate memory
banks (bank
a
and bank
b
) for simultaneous READ and
WRITE operations. Bank
a
is 8Mb deep and contains 8
x 4K-word parameter blocks and fifteen 32K-word
blocks. Bank
b
is 24Mb deep, is equally sectored, and
contains forty-eight 32K-word blocks.
Figures 2 and 3 show the top and bottom memory
organizations.
DEVICE MARKING
Due to the size of the package, Micron’s standard
part number is not printed on the top of each device.
Instead, an abbreviated device mark comprised of a
five-digit alphanumeric code is used. The abbreviated
device marks are cross referenced to Micron part num-
bers in Table 1.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MT28C3224P20FL-80 BET | 制造商:Micron Technology Inc 功能描述: |
| MT28C3224P20FL-80 BET TR | 制造商:Micron Technology Inc 功能描述: |
| MT28C6428P18 | 制造商:MICRON 制造商全称:Micron Technology 功能描述:FLASH AND SRAM COMBO MEMORY |
| MT28C6428P18FM-85 BET | 制造商:Micron Technology Inc 功能描述: |
| MT28C6428P18FM-85 BET TR | 制造商:Micron Technology Inc 功能描述: |
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