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參數(shù)資料
| 型號(hào)： | M29W022BT70K1T |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 2 Mbit 256Kb x8, Boot Block Low Voltage Single Supply Flash Memory |
| 中文描述： | 2兆位的256Kb × 8，啟動(dòng)塊低壓單電源閃存 |
| 文件頁數(shù)： | 2/20頁 |
| 文件大小： | 123K |
| 代理商： | M29W022BT70K1T |
M29W022BT, M29W022BB
2/20
Figure 2. TSOP Connections
A1
A2
A0
DQ0
A7
A6
A5
A4
A3
A13
A14
A17
W
VCC
A10
E
A8
A9
DQ7
DQ6
A11
G
DQ5
DQ4
DQ1
DQ2
DQ3
VSS
A16
A15
A12
NC
AI02970
M29W022BT
M29W022BB
8
9
1
16
17
24
25
32
Table 1. Signal Names
A0-A17
Address Inputs
DQ0-DQ7
Data Inputs/Outputs
E
Chip Enable
G
Output Enable
W
Write Enable
V
CC
Supply Voltage
V
SS
Ground
NC
Not Connected Internally
be protected independently to prevent accidental
Program or Erase commands from modifying the
memory. Program and Erase commands are writ-
ten to the Command Interface of the memory. An
on-chip Program/Erase Controller simplifies the
process of programming or erasing the memory by
taking care of all of the special operations that are
required to update the memory contents. 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 blocks in the memory are asymmetrically ar-
ranged, see Tables 3 and 4, Block Addresses.The
first or last 64 Kbytes have been divided into four
additional blocks. The 16 Kbyte Boot Block can be
used for small initialization code to start the micro-
processor, the two 8 Kbyte Parameter Blocks can
be used for parameter storage and the remaining
32 Kbyte is a small Main Block where the applica-
tion may be stored.
Chip Enable, Output Enableand Write Enable sig-
nals control the bus operation of the memory.
They allow simple connection to most micropro-
cessors, often without additional logic.
The memory is offered in a TSOP32 (8 x 14mm)
and PLCC32 packages and it is supplied with all
the bits erased (set to ’1’).
Figure 3. PLCC Connections
AI03045
A
A13
A8
A9
A11
G
A10
E
D
17
A1
A0
DQ0
D
D
D
D
A7
A6
A5
A4
A3
A2
9
W
1
A
DQ7
A
A14
32
N
V
M29W022BT
M29W022BB
A
D
25
V
SUMMARY DESCRIPTION
The M29W022B is a 2 Mbit (256Kb x8) non-vola-
tile memory that can be read, erased and repro-
grammed. These operations can be performed
using a single low voltage (2.7 to 3.6V) supply. On
power-up the memory defaults to its Read mode
where itcan be read in the same way as a ROM or
EPROM.
The memory is divided into blocks that can be
erased independently so it is possible to preserve
valid data while old data is erased. Each block can
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| M29W022BT70K6T | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:2 Mbit 256Kb x8, Boot Block Low Voltage Single Supply Flash Memory |
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| M29W022BT70NZ6T | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:2 Mbit 256Kb x8, Boot Block Low Voltage Single Supply Flash Memory |
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