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參數(shù)資料
| 型號： | AT25640A-10PI-1.8 |
| 廠商： | ATMEL CORP |
| 元件分類： | DRAM |
| 英文描述： | SPI Serial EEPROMs |
| 中文描述： | 8K X 8 SPI BUS SERIAL EEPROM, PDIP8 |
| 封裝： | 0.300 INCH, PLASTIC, MS-001BA, DIP-8 |
| 文件頁數(shù)： | 8/20頁 |
| 文件大?。?/td> | 388K |
| 代理商： | AT25640A-10PI-1.8 |
8
AT25080A/160A/320A/640A
5082B–SEEPR–1/05
WRITE STATUS REGISTER (WRSR):
The WRSR instruction allows the user to select
one of four levels of protection. The AT25080A/160A/320A/640A is divided into four
array segments. One-quarter, one-half, or all of the memory segments can be protected.
Any of the data within any selected segment will therefore be read only. The block write
protection levels and corresponding status register control bits are shown in Table 8.
Bits BP0, BP1, and WPEN are nonvolatile cells that have the same properties and func-
tions as the regular memory cells (e.g., WREN, t
WC
, RDSR).
The WRSR instruction also allows the user to enable or disable the write protect (WP)
pin through the use of the write protect enable (WPEN) bit. Hardware write protection is
enabled when the WP pin is low and the WPEN bit is “1”. Hardware write protection is
disabled when either the WP pin is high or the WPEN bit is “0”. When the device is hard-
ware write protected, writes to the status register, including the block protect bits and the
WPEN bit, and the block-protected sections in the memory array are disabled. Writes
are only allowed to sections of the memory that are not block-protected.
NOTE:
When the WPEN bit is hardware write protected, it cannot be changed back to
“0” as long as the WP pin is held low.
Table 8.
Block Write Protect Bits
Level
Status
Register Bits
Array Addresses Protected
BP1
BP0
AT25080A
AT25160A
AT25320A
AT25640A
0
0
0
None
None
None
None
1 (1/4)
0
1
0300
03FF
0600
07FF
0C00
0FFF
1800
1FFF
2 (1/2)
1
0
0200
03FF
0400
07FF
0800
0FFF
1000
1FFF
1
1
0000
03FF
0000
07FF
0000
0FFF
0000
1FFF
Table 9.
WPEN Operation
WPEN
WP
WEN
Protected
Blocks
Unprotected
Blocks
Status
Register
0
X
0
Protected
Protected
Protected
0
X
1
Protected
Writeable
Writeable
1
Low
0
Protected
Protected
Protected
1
Low
1
Protected
Writeable
Protected
X
High
0
Protected
Protected
Protected
X
High
1
Protected
Writeable
Writeable
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AT25640A-10PI-2.7 | SPI Serial EEPROMs |
| AT25640A-10TI-1.8 | High Speed CMOS Logic Quad 2-Input OR Gates 14-PDIP -55 to 125 |
| AT25640A-10TI-2.7 | High Speed CMOS Logic Quad 2-Input OR Gates 14-PDIP -55 to 125 |
| AT25640A-10TU-2.7 | High Speed CMOS Logic Quad 2-Input OR Gates 14-SOIC -55 to 125 |
| AT25320A | SPI Serial EEPROMs |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AT25640A-10PI-2.7 | 功能描述:電可擦除可編程只讀存儲器 64k (8192x8) 2.7V 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 |
| AT25640A-10PQ-2.7 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:SPI Serial EEPROMs |
| AT25640A-10PU-1.8 | 功能描述:電可擦除可編程只讀存儲器 64K SPI 1M CYCLES - 10MS 1.8V 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 |
| AT25640A-10PU-2.7 | 功能描述:電可擦除可編程只讀存儲器 64K SPI 1M CYCLES - 10MS 2.7V 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 |
| AT25640A-10TI-1.8 | 功能描述:IC EEPROM 64KBIT 20MHZ 8TSSOP RoHS:否 類別:集成電路 (IC) >> 存儲器 系列:- 標(biāo)準(zhǔn)包裝:96 系列:- 格式 - 存儲器:閃存 存儲器類型:FLASH 存儲容量:16M（2M x 8，1M x 16） 速度:70ns 接口:并聯(lián) 電源電壓:2.65 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 封裝/外殼:48-TFSOP（0.724"，18.40mm 寬） 供應(yīng)商設(shè)備封裝:48-TSOP 包裝:托盤 |
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