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参数资料
| 型号： | CAT28LV256NI-20 |
| 厂商： | ON SEMICONDUCTOR |
| 元件分类： | PROM |
| 英文描述： | 32K X 8 EEPROM 3V, 200 ns, PQCC32 |
| 封装： | PLASTIC, LCC-32 |
| 文件页数： | 2/12页 |
| 文件大小： | 284K |
| 代理商： | CAT28LV256NI-20 |
CAT28LV256
10
Doc. No. MD-1071, Rev. D
2008 SCILLC. All rights reserved.
Characteristics subject to change without notice
CE
WE
AA
5555
55
2AAA
DATA
ADDRESS
tWC
80
5555
AA
5555
55
2AAA
20
5555
SDP
RESET
DEVICE
UNPROTECTED
CE
WE
tWP
AA
5555
55
2AAA
A0
5555
DATA
ADDRESS
tBLC
tWC
BYTE OR
PAGE
WRITES
ENABLED
To activate the software data protection, the device must
be sent three write commands to specific addresses with
specific data (Figure 9). This sequence of commands
(along with subsequent writes) must adhere to the page
write timing specifications (Figure 11). Once this is done,
all subsequent byte or page writes to the device must be
preceded by this same set of write commands. The data
protection mechanism is activated until a deactivate
sequence is issued, regardless of power on/off transi-
tions. This gives the user added inadvertent write pro-
tection on power-up in addition to the hardware protec-
tion provided.
To allow the user the ability to program the device with
an E2PROM programmer (or for testing purposes) there
is a software command sequence for deactivating the
data protection. The six step algorithm (Figure 10) will
reset the internal protection circuitry, and the device will
return to standard operating mode (Figure 12 provides
reset timing). After the sixth byte of this reset sequence
has been issued, standard byte or page writing can
commence.
Figure 11. Software Data Protection Timing
Figure 12. Resetting Software Data Protection Timing
相关PDF资料 |
PDF描述 |
|---|---|
| CAT28LV256P-35 | 32K X 8 EEPROM 3V, 350 ns, PDIP28 |
| CAT29F150N-15B | 13 Output, 3.3V SDRAM Buffer for Desktop PCs with 3 DIMMs |
| CAT29F150N-15T | 18 Output, 3.3V SDRAM Buffer for Desktop PCs with 4 DIMMs |
| CAT29F150N-20B | x8 Flash EEPROM |
| CAT29F150N-20T | x8 Flash EEPROM |
相关代理商/技术参数 |
参数描述 |
|---|---|
| CAT28LV256NI25 | 制造商:Catalyst Semiconductor 功能描述: |
| CAT28LV256NI-25 | 功能描述:电可擦除可编程只读存储器 (32kx8) 256K 3V 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 |
| CAT28LV256NI-30 | 功能描述:电可擦除可编程只读存储器 (32kx8) 256K 3V 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 |
| CAT28LV256P-25 | 功能描述:电可擦除可编程只读存储器 (32kx8) 256K 3V 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 |
| CAT28LV256P-30 | 功能描述:电可擦除可编程只读存储器 (32kx8) 256K 3V 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 |
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