- 您现在的位置：买卖IC网 > PDF目录20558 > AT25256W-10SI-1.8 (Atmel)IC EEPROM 256KBIT 2.1MHZ 8SOIC PDF资料下载
参数资料
| 型号： | AT25256W-10SI-1.8 |
| 厂商： | Atmel |
| 文件页数： | 7/22页 |
| 文件大小： | 0K |
| 描述： | IC EEPROM 256KBIT 2.1MHZ 8SOIC |
| 标准包装： | 94 |
| 格式 - 存储器： | EEPROMs - 串行 |
| 存储器类型： | EEPROM |
| 存储容量： | 256K (32K x 8) |
| 速度： | 500kHz，2.1MHz |
| 接口： | SPI 3 线串行 |
| 电源电压： | 1.8 V ~ 3.6 V |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 8-SOIC（0.209"，5.30mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 管件 |
AT25128/256
WRITE ENABLE (WREN): The device will power-up in the write disable state when V CC
is applied. All programming instructions must therefore be preceded by a Write Enable
instruction.
WRITE DISABLE (WRDI): To protect the device against inadvertent writes, the Write
Disable instruction disables all programming modes. The WRDI instruction is indepen-
dent of the status of the WP pin.
READ STATUS REGISTER (RDSR): The Read Status Register instruction provides
access to the status register. The Ready/Busy and Write Enable status of the device
can be determined by the RDSR instruction. Similarly, the Block Write Protection bits
indicate the extent of protection employed. These bits are set by using the WRSR instruc-
tion.
Table 6. Status Register Format
Bit 7
WPEN
Bit 6
X
Bit 5
X
Bit 4
X
Bit 3
BP1
Bit 2
BP0
Bit 1
WEN
Bit 0
RDY
Table 7. Read Status Register Bit Definition
Bit
Bit 0 (RDY)
Bit 1 (WEN)
Bit 2 (BP0)
Bit 3 (BP1)
Definition
Bit 0 = “0” (RDY) indicates the device is READY.
Bit 0 = “1” indicates the write cycle is in progress.
Bit 1 = “0” indicates the device is not WRITE ENABLED. Bit 1 = 1
indicates the device is WRITE ENABLED.
See Table 8.
See Table 8.
Bits 4 - 6 are “0”s when device is not in an internal write cycle.
Bit 7 (WPEN)
See Table 9.
Bits 0 – 7 are “1”s during an internal write cycle.
WRITE STATUS REGISTER (WRSR): The WRSR instruction allows the user to select
one of four levels of protection. The AT25128/256 is divided into four array segments.
Top quarter (1/4), top half (1/2), 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 pro-
tection levels and corresponding status register control bits are shown in Table 8.
The three bits, BP0, BP1, and WPEN are nonvolatile cells that have the same properties
and functions as the regular memory cells (e.g. WREN, t WC , RDSR).
Table 8. Block Write Protect Bits
Status Register Bits
Array Addresses Protected
Level
0
1(1/4)
2(1/2)
3(All)
BP1
0
0
1
1
BP0
0
1
0
1
AT25128
None
3000 - 3FFF
2000 - 3FFF
0000 - 3FFF
AT25256
None
6000 - 7FFF
4000 - 7FFF
0000 - 7FFF
7
0872O–SEEPR–03/05
相关PDF资料 |
PDF描述 |
|---|---|
| LXC75-0350SW | POWER SUPPLY LED 75W 350MA |
| T95V335M020CSAL | CAP TANT 3.3UF 20V 20% 1410 |
| VE-2NJ-CY-B1 | CONVERTER MOD DC/DC 36V 50W |
| LDV75-024SN | POWER SUPPLY LED 75W 24V COMPACT |
| GBM18DSXI | CONN EDGECARD 36POS DIP .156 SLD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AT25256W-10SI-2.7 | 功能描述:IC EEPROM 256KBIT 3MHZ 8SOIC RoHS:否 类别:集成电路 (IC) >> 存储器 系列:- 标准包装:378 系列:- 格式 - 存储器:闪存 存储器类型:FLASH 存储容量:8M（1M x 8，512K x 16） 速度:110ns 接口:并联 电源电压:2.7 V ~ 3.6 V 工作温度:-40°C ~ 85°C 封装/外壳:48-CBGA 供应商设备封装:48-CBGA（7x7） 包装:托盘 |
| AT25256W-10SJ-1.8 | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:SPI Serial EEPROMs |
| AT25256W-10SJ-2.7 | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:SPI Serial EEPROMs |
| AT25256W10SU27 | 制造商:ATMEL 功能描述:Pb Free |
| AT-252PIN | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog Attenuator |
发布紧急采购，3分钟左右您将得到回复。