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参数资料
| 型号： | AT24C64W-10SI-1.8 |
| 厂商： | Atmel |
| 文件页数： | 9/19页 |
| 文件大小： | 0K |
| 描述： | IC EEPROM 64KBIT 400KHZ 8SOIC |
| 标准包装： | 94 |
| 格式 - 存储器： | EEPROMs - 串行 |
| 存储器类型： | EEPROM |
| 存储容量： | 64K (8K x 8) |
| 速度： | 100kHz，400kHz |
| 接口： | I²C，2 线串口 |
| 电源电压： | 1.8 V ~ 5.5 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 |
| 其它名称： | AT24C64W10SI1.8 |
AT24C32/64
Device Addressing
Write Operations
The 32K/64K EEPROM requires an 8-bit device address word following a start condition
to enable the chip for a read or write operation (refer to Figure 1). The device address
word consists of a mandatory one, zero sequence for the first four most significant bits
as shown. This is common to all 2-wire EEPROM devices.
The 32K/64K uses the three device address bits A2, A1, A0 to allow as many as eight
devices on the same bus. These bits must compare to their corresponding hardwired
input pins. The A2, A1, and A0 pins use an internal proprietary circuit that biases them
to a logic low condition if the pins are allowed to float.
The eighth bit of the device address is the read/write operation select bit. A read opera-
tion is initiated if this bit is high and a write operation is initiated if this bit is low.
Upon a compare of the device address, the EEPROM will output a zero. If a compare is
not made, the device will return to standby state.
NOISE PROTECTION: Special internal circuitry placed on the SDA and SCL pins pre-
vent small noise spikes from activating the device. A low-V CC detector (5-volt option)
resets the device to prevent data corruption in a noisy environment.
DATA SECURITY: The AT24C32/64 has a hardware data protection scheme that allows
the user to write protect the upper quadrant (8/16K bits) of memory when the WP pin is
at V CC .
BYTE WRITE: A write operation requires two 8-bit data word addresses following the
device address word and acknowledgment. Upon receipt of this address, the EEPROM
will again respond with a zero and then clock in the first 8-bit data word. Following
receipt of the 8-bit data word, the EEPROM will output a zero and the addressing
device, such as a microcontroller, must terminate the write sequence with a stop condi-
tion. At this time the EEPROM enters an internally-timed write cycle, t WR , to the
nonvolatile memory. All inputs are disabled during this write cycle and the EEPROM will
not respond until the write is complete (refer to Figure 2).
PAGE WRITE: The 32K/64K EEPROM is capable of 32-byte page writes.
A page write is initiated the same way as a byte write, but the microcontroller does not
send a stop condition after the first data word is clocked in. Instead, after the EEPROM
acknowledges receipt of the first data word, the microcontroller can transmit up to 31
more data words. The EEPROM will respond with a zero after each data word received.
The microcontroller must terminate the page write sequence with a stop condition (refer
to Figure 3).
The data word address lower 5 bits are internally incremented following the receipt of
each data word. The higher data word address bits are not incremented, retaining the
memory page row location. When the word address, internally generated, reaches the
page boundary, the following byte is placed at the beginning of the same page. If more
than 32 data words are transmitted to the EEPROM, the data word address will “roll
over” and previous data will be overwritten.
ACKNOWLEDGE POLLING: Once the internally-timed write cycle has started and the
EEPROM inputs are disabled, acknowledge polling can be initiated. This involves send-
ing a start condition followed by the device address word. The read/write bit is
representative of the operation desired. Only if the internal write cycle has completed
will the EEPROM respond with a zero, allowing the read or write sequence to continue.
9
0336K–SEEPR–7/03
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AT24C64W-10SI-2.5 | 功能描述:IC EEPROM 64KBIT 400KHZ 8SO 制造商:microchip technology 系列:- 包装:管件 零件状态:停產 存储器类型:非易失 存储器格式:EEPROM 技术:EEPROM 存储容量:64Kb （8K x 8） 时钟频率:400kHz 写周期时间 - 字，页:10ms 访问时间:900ns 存储器接口:I2C 电压 - 电源:2.5 V ~ 5.5 V 工作温度:-40°C ~ 85°C（TA） 安装类型:表面贴装 封装/外壳:8-SOIC（0.209"，5.30mm 宽） 供应商器件封装:8-SOIC 基本零件编号:AT24C64 标准包装:94 |
| AT24C64W-10SI-2.7 | 功能描述:电可擦除可编程只读存储器 32/64k 2-Wire Bus 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 |
| AT24C94AN-10SI-2.7 | 制造商:Atmel Corporation 功能描述: |
| AT24CM01-SHD-B | 制造商:Atmel Corporation 功能描述:Cap Film 0.27uF 400V PP 10% (18 X 7.5 X 13.5mm) Radial 15mm 105°C Pizza Pack 制造商:Atmel Corporation 功能描述:8 EIAJ SOIC, PB/HALO FREE, NIPDAU, 2.5V - Bulk 制造商:Atmel Corporation 功能描述:IC EEPROM 1MBIT 1MHZ 8SOIC 制造商:Atmel Corporation 功能描述:SERIAL EEPROM, 1M 2-WIR-8 EIAJ SOIC 制造商:Atmel 功能描述:Cap Film 0.27uF 400V PP 10% (18 X 7.5 X 13.5mm) Radial 15mm 105°C Pizza Pack |
| AT24CM01-SHD-B SL901 | 制造商:Atmel Corporation 功能描述:IC EEPROM 1MBIT 1MHZ 8SOIC |
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