参数资料
| 型号： | AT24C02C-PUM |
| 厂商： | Atmel |
| 文件页数： | 9/23页 |
| 文件大小： | 0K |
| 描述： | IC EEPROM 2KBIT 1MHZ 8PDIP |
| 标准包装： | 50 |
| 格式 - 存储器： | EEPROMs - 串行 |
| 存储器类型： | EEPROM |
| 存储容量： | 2K (256 x 8) |
| 速度： | 400kHz，1MHz |
| 接口： | I²C，2 线串口 |
| 电源电压： | 1.7 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 8-DIP（0.300"，7.62mm） |
| 供应商设备封装： | 8-DIP |
| 包装： | 散装 |
7.
Device Addressing
The 1-Kbit and 2-Kbit EEPROM device requires an 8-bit device address word following a start condition to enable the
chip for a Read or Write operation.
The device address word consists of a mandatory ‘1010’ (0xA) sequence for the first four most significant bits as
shown in Figure 7-1 . This is common to all Serial EEPROM devices.
The next three bits are the A2, A1, and A0 device address bits for the 1K and 2K EEPROM. These three bits must
compare to their corresponding hard-wired input pins A 2 , A 1 , and A 0 in order for the part to acknowledge.
The eighth bit of the device address is the Read/Write operation select bit. A Read operation is initiated if this bit is high
and a Write operation is initiated if this bit is low.
Upon a valid compare of the device address with hard-wired input pins A 2 , A 1 , and A 0 , the EEPROM will output a zero. If
a compare is not successfully made, the chip will return to a standby state.
Figure 7-1. Device Address
1K or 2K
1
0
1
0
A2
A1
A0 R/W
MSB
LSB
8.
Write Operations
Byte Write: A Byte Write operation requires an 8-bit data word address 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 condition. 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 (see Figure 9-1 on page 10 ).
Page Write: The 1-Kbit and 2-Kbit EEPROM are capable of an 8-byte Page Write.
A Page Write is initiated the same 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 seven 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 (see Figure 9-2 on page 10 ).
The data word address lower three 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 eight
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 sending 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.
Data Security: The AT24C01C/02C has a hardware data protection scheme that allows the user to write protect the
entire memory when the WP pin is at V CC .
Atmel AT24C01C/02C [DATASHEET]
8700F–SEEPR–6/12
9
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| AT24C02C-SSHM-B | 功能描述:电可擦除可编程只读存储器 PB/HALO FREE NiPdAu, 1.7V 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 |
| AT24C02C-SSHM-T | 功能描述:电可擦除可编程只读存储器 PB/HALO free NiPdAu, 1.7V 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 |
| AT24C02C-SSHM-T SL901 | 制造商:Atmel Corporation 功能描述:IC EEPROM 2KBIT 1MHZ 8SOIC |
| AT24C02C-SSHM-T | 制造商:Atmel Corporation 功能描述:Serial EEPROM IC |
| AT24C02C-STUM-T | 功能描述:电可擦除可编程只读存储器 PB/HALO free MATT TIN, 1.7V 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 |
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