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参数资料
| 型号： | AT34C02-10PU-2.7 |
| 厂商： | ATMEL CORP |
| 元件分类： | PROM |
| 英文描述： | 256 X 8 I2C/2-WIRE SERIAL EEPROM, PDIP8 |
| 封装： | 0.300 INCH, LEAD AND HALOGEN FREE, PLASTIC, MS-001BA, DIP-8 |
| 文件页数： | 20/20页 |
| 文件大小： | 295K |
| 代理商： | AT34C02-10PU-2.7 |
9
AT34C02
0958O–SEEPR–12/04
Device Addressing
The 2K EEPROM device requires an 8-bit device address word following a start condi-
tion to enable the chip for a read or write operation (see Figure 8 on page 12).
The device address word consists of a mandatory one-zero sequence for the first four
most-significant bits (1010) for normal read and write operations and 0110 for writing to
the write protect register.
The next 3 bits are the A2, A1 and A0 device address bits for the AT34C02 EEPROM.
These 3 bits must compare to their corresponding hard-wired input pins.
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 chip will return to a standby state. The device will not acknowledge if the
write protect register has been programmed and the control code is 0110.
Write Operations
BYTE WRITE: A 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 condi-
tion. At this time the EEPROM enters an internally-timed write cycle, tWR, 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 on page 12).
The device will acknowledge a write command, but not write the data, if the software or
hardware write protection has been enabled. The write cycle time must be observed
even when the write protection is enabled.
PAGE WRITE: The 2K device is capable of 16-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 fifteen
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 (see
The data word address lower four 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 sixteen data words are transmitted to the EEPROM, the data word address will “roll
over” and previous data will be overwritten. The address “roll over” during write is from
the last byte of the current page to the first byte of the same page.
The device will acknowledge a write command, but not write the data, if the software or
hardware write protection has been enabled. The write cycle time must be observed
even when the write protection is enabled.
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.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AT34C02-10TC | 功能描述:IC EEPROM 2KBIT 400KHZ 8TSSOP 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 |
| AT34C02-10TC-1.8 | 功能描述:IC EEPROM 2KBIT 400KHZ 8TSSOP 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 |
| AT34C02-10TC-2.7 | 功能描述:IC EEPROM 2KBIT 400KHZ 8TSSOP 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 |
| AT34C0210TC27SL514 | 制造商:Atmel Corporation 功能描述:2K 2 WIRE SERIALS |
| AT34C02-10TE-2.7 | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:Two-wire Serial EEPROM with Permanent Software Write Protect |
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