25XX080A/B
2.7
Data Protection
2.8
Power-On State
The following protection has been implemented to
prevent inadvertent writes to the array:
? The write enable latch is reset on power-up
? A write enable instruction must be issued to set
the write enable latch
? After a byte write, page write or Status Register
write, the write enable latch is reset
? CS must be set high after the proper number of
clock cycles to start an internal write cycle
? Access to the array during an internal write cycle
is ignored and programming is continued
The 25XX080A/B powers on in the following state:
? The device is in low-power Standby mode
(CS = 1 )
? The write enable latch is reset
? SO is in high-impedance state
? A high-to-low-level transition on CS is required to
enter active state
TABLE 2-4:
WRITE-PROTECT FUNCTIONALITY MATRIX
WEL
(SR bit 1)
0
1
1
1
WPEN
(SR bit 7)
x
0
1
1
WP
(pin 3)
x
x
0 (low)
1 (high)
Protected Blocks
Protected
Protected
Protected
Protected
Unprotected Blocks
Protected
Writable
Writable
Writable
Status Register
Protected
Writable
Protected
Writable
x = don’t care
DS21808D-page 12
? 2007 Microchip Technology Inc.
相关PDF资料
25LC1024T-E/MF IC EEPROM 1MBIT 20MHZ 8DFN
25LC128-E/MF IC EEPROM 128KBIT 10MHZ 8DFN
25LC160/P IC EEPROM 16KBIT 2MHZ 8DIP
25LC160B-I/PG IC EEPROM 16KBIT 10MHZ 8DIP
25LC256T-E/MF IC EEPROM 256KBIT 10MHZ 8DFN
25LC320A-I/P IC EEPROM 32KBIT 10MHZ 8DIP
25LC512-E/MF IC EEPROM 512KBIT 20MHZ 8DFN
25LC640-E/P IC EEPROM 64KBIT 2MHZ 8DIP
相关代理商/技术参数
25LC080A-I/W15K 功能描述:电可擦除可编程只读存储器 8K, 1K X 8, 16B PAGE, 2.5V SER EE, WAFER RoHS:否 制造商:Atmel 存储容量:2 Kbit 组织:256 B x 8 数据保留:100 yr 最大时钟频率:1000 KHz 最大工作电流:6 uA 工作电源电压:1.7 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8
25LC080A-I/WF15K 功能描述:电可擦除可编程只读存储器 8K, 1K X 8, 16B PAGE, 2.5V SER EE, WAFER on FRAME RoHS:否 制造商:Atmel 存储容量:2 Kbit 组织:256 B x 8 数据保留:100 yr 最大时钟频率:1000 KHz 最大工作电流:6 uA 工作电源电压:1.7 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8
25LC080AMS 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:8K SPI Bus Serial EEPROM
25LC080AP 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:8K SPI Bus Serial EEPROM
25LC080ASN 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:8K SPI Bus Serial EEPROM
25LC080AST 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:8K SPI Bus Serial EEPROM
25LC080AT-E/MS 功能描述:电可擦除可编程只读存储器 1kx8 16B - 2.5V RoHS:否 制造商:Atmel 存储容量:2 Kbit 组织:256 B x 8 数据保留:100 yr 最大时钟频率:1000 KHz 最大工作电流:6 uA 工作电源电压:1.7 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8
25LC080AT-E/MSG 功能描述:电可擦除可编程只读存储器 1kx8 - 2.5V 16B Extended Temp RoHS:否 制造商:Atmel 存储容量:2 Kbit 组织:256 B x 8 数据保留:100 yr 最大时钟频率:1000 KHz 最大工作电流:6 uA 工作电源电压:1.7 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8