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參數(shù)資料
| 型號： | CAT28LV64JA-25T |
| 元件分類： | PROM |
| 英文描述： | 8K X 8 EEPROM 3V, 250 ns, PDSO28 |
| 封裝： | SOIC-28 |
| 文件頁數(shù)： | 2/12頁 |
| 文件大小： | 527K |
| 代理商： | CAT28LV64JA-25T |
CAT28LV64
10
Doc. No. 1010, Rev. D
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 transitions.
This gives the user added inadvertent write protection
on power-up in addition to the hardware protection
provided.
To allow the user the ability to program the device with
an EEPROM 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
CE
WE
tWP
AA
1555
55
0AAA
A0
1555
DATA
ADDRESS
tBLC
tWC
BYTE OR
PAGE
WRITES
ENABLED
CE
WE
AA
1555
55
0AAA
DATA
ADDRESS
tWC
80
1555
AA
1555
55
0AAA
20
1555
SDP
RESET
DEVICE
UNPROTECTED
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CAT28LV64JI-20 | 功能描述:電可擦除可編程只讀存儲器 (8kx8) 64K 3V RoHS:否 制造商:Atmel 存儲容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時鐘頻率:1000 KHz 最大工作電流:6 uA 工作電源電壓:1.7 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 |
| CAT28LV64JI-25 | 功能描述:電可擦除可編程只讀存儲器 (8kx8) 64K 3V RoHS:否 制造商:Atmel 存儲容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時鐘頻率:1000 KHz 最大工作電流:6 uA 工作電源電壓:1.7 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 |
| CAT28LV64L-20 | 功能描述:電可擦除可編程只讀存儲器 (8kx8) 64K 3V 200ns RoHS:否 制造商:Atmel 存儲容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時鐘頻率:1000 KHz 最大工作電流:6 uA 工作電源電壓:1.7 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 |
| CAT28LV64L-25 | 功能描述:電可擦除可編程只讀存儲器 (8kx8) 64k 3V 250ns RoHS:否 制造商:Atmel 存儲容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時鐘頻率:1000 KHz 最大工作電流:6 uA 工作電源電壓:1.7 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 |
| CAT28LV64LI20 | 功能描述:電可擦除可編程只讀存儲器 64K-Bit CMOS PARA 電可擦除可編程只讀存儲器 RoHS:否 制造商:Atmel 存儲容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時鐘頻率:1000 KHz 最大工作電流:6 uA 工作電源電壓:1.7 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 |
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