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參數(shù)資料
| 型號： | AT49F020 |
| 廠商： | Atmel Corp. |
| 英文描述： | 256K x 8 5-volt Only Flash Memory(256K x 8 5V閃速存儲器) |
| 中文描述： | 256K × 8 5伏只有閃存（256K × 8 5V的閃速存儲器） |
| 文件頁數(shù)： | 1/12頁 |
| 文件大?。?/td> | 133K |
| 代理商： | AT49F020 |
1
Features
Single Voltage Operation
– 5V Read
– 5V Reprogramming
Fast Read Access Time - 90 ns
Internal Program Control and Timer
8K Bytes Boot Block With Lockout
Fast Erase Cycle Time - 10 seconds
Byte-By-Byte Programming - 50 μs/Byte
Hardware Data Protection
DATA Polling For End Of Program Detection
Low Power Dissipation
– 50 mA Active Current
– 100 μA CMOS Standby Current
Typical 10,000 Write Cycles
Description
The AT49F020 is a 5-volt only in-system Flash Memory. Its 2 megabits of memory is
organized as 262,144 words by 8 bits. Manufactured with Atmel’s advanced nonvola-
tile CMOS technology, the device offers access times to 90 ns with power dissipation
of just 275 mW over the commercial temperature range. When the device is dese-
lected, the CMOS standby current is less than 100
μ
A.
To allow for simple in-system reprogrammability, the AT49F020 does not require high
input voltages for programming. Five-volt-only commands determine the read and
programming operation of the device. Reading data out of the device is similar to
reading from an EPROM. Reprogramming the AT49F020 is performed by erasing the
entire 2 megabits of memory and then programming on a byte by byte basis. The byte
Pin Configurations
2-Megabit
(256K x 8)
5-volt Only
Flash Memory
AT49F020
Rev. 0567C–10/98
Pin Name
Function
A0 - A17
Addresses
CE
Chip Enable
OE
Output Enable
WE
Write Enable
I/O0 - I/O7
Data Inputs/Outputs
NC
No Connect
TSOP Top View
Type 1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
A11
A9
A8
A13
A14
A17
WE
VCC
NC
A16
A15
A12
A7
A6
A5
A4
OE
A10
CE
I/O7
I/O6
I/O5
I/O4
I/O3
GND
I/O2
I/O1
I/O0
A0
A1
A2
A3
DIP Top View
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
NC
A16
A15
A12
A7
A6
A5
A4
A3
A2
A1
A0
I/O0
I/O1
I/O2
GND
VCC
WE
A17
A14
A13
A8
A9
A11
OE
A10
CE
I/O7
I/O6
I/O5
I/O4
I/O3
(continued)
PLCC Top View
5
6
7
8
9
10
11
12
13
29
28
27
26
25
24
23
22
21
A7
A6
A5
A4
A3
A2
A1
A0
I/O0
A14
A13
A8
A9
A11
OE
A10
CE
I/O7
4
3
2
1
3
3
3
1
1
1
1
1
1
2
I
I
G
I
I
I
I
A
A
A
N
V
W
A
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AT49F040-12JC | 4-Megabit 512K x 8 5-volt Only CMOS Flash Memory |
| AT49F040-12JI | 4-Megabit 512K x 8 5-volt Only CMOS Flash Memory |
| AT49F040-12PC | 4-Megabit 512K x 8 5-volt Only CMOS Flash Memory |
| AT49F040-12PI | 4-Megabit 512K x 8 5-volt Only CMOS Flash Memory |
| AT49F040-90TC | 4-Megabit 512K x 8 5-volt Only CMOS Flash Memory |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AT49F020-12JC | 制造商:Atmel Corporation 功能描述: |
| AT49F020-12JI | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:x8 Flash EEPROM |
| AT49F020-12PC | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:x8 Flash EEPROM |
| AT49F020-12PI | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:x8 Flash EEPROM |
| AT49F020-12TC | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:x8 Flash EEPROM |
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