參數(shù)資料
型號(hào): 79LV0832RT4QH-20
廠商: MAXWELL TECHNOLOGIES
元件分類: PROM
英文描述: 8 Megabit (256K x 32-Bit) Low Voltage EEPROM MCM
中文描述: 256K X 32 EEPROM 3V, 200 ns, QFP96
封裝: QFP-96
文件頁(yè)數(shù): 15/21頁(yè)
文件大小: 458K
代理商: 79LV0832RT4QH-20
M
15
01.10.05 Rev 8
All data sheets are subject to change without notice
2005 Maxwell Technologies
All rights reserved
Low Voltage 8 Megabit (256K x 32-Bit) EEPROMMCM
79LV0832
.
3. Software Data Protection
Enable
The 79LV0832 contains a software controlled write protection feature that allows the user to inhibit all write operations to the
device. This is useful in protecting the device fromunwanted write cycles due to uncontrollable circuit noise or inadvertent
writes caused by mnor bus contentions. Software data protection is enabled by writing the following data sequence to the
EEPROMand allowing the write cycle period (t
WC
) of 10ms to elapse:
.
Software Data Protection Enable Sequence
4. Writing to the Memory with Software Data Protection Enabled
To write to the device once Software protection is enabled, the enable sequence must precede the data to be written. This
sequence allows the write to occur while at the same time keeping the software protection enabled
Sequence for Writing Data with Software Protection Enabled
.
15mS
Address
5555
AAAA or 2AAA
5555
Data
AA AA AA AA
55 55 55 55
A0 A0 A0 A0
Address
5555
AAAA or 2AAA
5555
Data
AA AA AA AA
55 55 55 55
A0 A0 A0 A0
Normal Data Input
Write Address(s)
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