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参数资料
| 型号： | AT49F002T-55PI |
| 厂商： | ATMEL CORP |
| 元件分类： | DRAM |
| 英文描述： | LM4858 Boomer ® Audio Power Amplifier Series Mono 1.5 W / Stereo 300mW Power Amplifier; Package: MINI SOIC; No of Pins: 10 |
| 中文描述： | 256K X 8 FLASH 5V PROM, 55 ns, PDIP32 |
| 封装： | 0.600 INCH, PLASTIC, DIP-32 |
| 文件页数： | 2/12页 |
| 文件大小： | 119K |
| 代理商： | AT49F002T-55PI |
AT49F002(N)T
2
When the device is deselected, the CMOS standby current
is less than 100
μ
A. For the AT49F002NT pin 1 for the DIP
and PLCC packages and pin 9 for the TSOP package are
no connect pins.
To allow for simple in-system reprogrammability, the
AT49F002(N)T does not require high input voltages for pro-
gramming. 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; it
has standard CE, OE, and WE inputs to avoid bus conten-
tion. Reprogramming the AT49F002(N)T is performed by
erasing a block of data and then programming on a byte by
byte basis. The byte programming time is a fast 50
μ
s. The
end of a program cycle can be optionally detected by the
DATA polling feature. Once the end of a byte program
cycle has been detected, a new access for a read or pro-
gram can begin. The typical number of program and erase
cycles is in excess of 10,000 cycles.
The device is erased by executing the erase command
sequence; the device internally controls the erase opera-
tions. There are two 8K byte parameter block sections and
two main memory blocks.
The device has the capability to protect the data in the boot
block; this feature is enabled by a command sequence.
The 16K-byte boot block section includes a reprogramming
lock out feature to provide data integrity. The boot sector is
designed to contain user secure code, and when the fea-
ture is enabled, the boot sector is protected from being
reprogrammed.
In the AT49F002NT, once the boot block programming
lockout feature is enabled, the contents of the boot block
are permanent and cannot be changed. In the AT49F002T,
once the boot block programming lockout feature is
enabled, the contents of the boot block cannot be changed
with input voltage levels of 5.5 volts or less.
Block Diagram
CONTROL
LOGIC
Y DECODER
PARAMETER
BLOCK 1
(8K BYTES)
BOOT BLOCK
(16K BYTES)
OE
WE
CE
RESET
ADDRESS
INPUTS
V
CC
GND
DATA INPUTS/OUTPUTS
I/O7 - I/O0
8
X DECODER
PARAMETER
BLOCK 2
(8K BYTES)
MAIN MEMORY
BLOCK 1
(96K BYTES)
MAIN MEMORY
BLOCK 2
(128K BYTES)
PROGRAM
DATA LATCHES
Y-GATING
INPUT/OUTPUT
BUFFERS
3FFFF
3C000
3BFFF
3A000
39FFF
38000
37FFF
20000
1FFFF
00000
相关PDF资料 |
PDF描述 |
|---|---|
| AT49F002T-55TC | 2-Megabit 256K x 8 5-volt Only CMOS Flash Memory |
| AT49F002T-55TI | 2-Megabit 256K x 8 5-volt Only CMOS Flash Memory |
| AT49F002T | 2-Megabit 5-volt Only CMOS Flash Memory(2M位 5V CMOS闪速存储器) |
| AT49F002 | 2-Megabit 256K x 8 5-volt Only Flash Memory |
| AT49F002A | 2-megabit (256K x 8) 5-volt Only Flash Memory |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AT49F002T-55TC | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:2-Megabit 256K x 8 5-volt Only CMOS Flash Memory |
| AT49F002T-55TI | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:2-Megabit 256K x 8 5-volt Only CMOS Flash Memory |
| AT49F002T-55VC | 制造商:未知厂家 制造商全称:未知厂家 功能描述:x8 Flash EEPROM |
| AT49F002T-55VI | 制造商:未知厂家 制造商全称:未知厂家 功能描述:x8 Flash EEPROM |
| AT49F002T-70JC | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:2-Megabit 256K x 8 5-volt Only CMOS Flash Memory |
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