参数资料
| 型号： | AT34C02C-TH-B |
| 厂商： | Atmel |
| 文件页数： | 8/21页 |
| 文件大小： | 0K |
| 描述： | IC EEPROM 2KBIT 400KHZ 8TSSOP |
| 标准包装： | 100 |
| 格式 - 存储器： | EEPROMs - 串行 |
| 存储器类型： | EEPROM |
| 存储容量： | 2K (256 x 8) |
| 速度： | 100kHz，400kHz |
| 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-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 8-TSSOP |
| 包装： | 管件 |
| 产品目录页面： | 1456 (CN2011-ZH PDF) |
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 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.
7.
Write protection
The software write protection, once enabled, write protects only the first-half of the array (00H - 7FH) while the hardware
write protection, via the WP pin, is used to protect the entire array.
PERMANENT SOFTWARE WRITE PROTECTION: The software write protection is enabled by sending a command,
similar to a normal write command, to the device which programs the permanent write protect register. This must be done
with the WP pin low. The write protect register is programmed by sending a write command with the device address of
0110 instead of 1010 with the address and data bit being don’t cares (see Figure 7-1 on page 8 ). Once the software
write protection has been enabled, the device will no longer acknowledge the 0110 control byte. The software write
protection cannot be reversed even if the device is powered down. The write cycle time must be observed.
REVERSIBLE SOFTWARE WRITE PROTECTION : The reversible software write protection is enabled by sending a
command, similar to a normal write command, to the device which programs the reversible write protect register. This
must be done with the WP pin low. The write protect register is programmed by sending a write command 01100010
with pins A 2 and A 1 tied to ground or don't connect and pin A 0 connected to VHV (see Figure 7-2 ). The reversible write
protection can be reversed by sending a command 01100110 with pin A 2 tied to ground or no connect, pin A 1 tied to V CC
and pin A 0 tied to VHV (see Figure 7-3 ).
HARDWARE WRITE PROTECTION: The WP pin can be connected to V CC , GND, or left floating. Connecting the WP pin to
V CC will write protect the entire array, regardless of whether or not the software write protection has been enabled. The
software write protection register cannot be programmed when the WP pin is connected to V CC . If the WP pin is connected
to GND or left floating, the write protection mode is determined by the status of the software write protect register.
Figure 7-1.
Setting permanent write protect register (PSWP)
S
T
A
R
T
CONTROL
BYTE
WORD
ADDRESS
DATA
S
T
O
P
SDA LINE
0 1 1 0 A2 A1 A0 0
8
Atmel AT34C02C
A
C
K
= Don't Care
A
C
K
A
C
K
5185E–SEEPR–3/11
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AT34C02C-TH-T | 功能描述:电可擦除可编程只读存储器 PB/ 1.8V - PB/ 1.8V 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 |
| AT34C02C-TP25-B | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:Two-wire Automotive Temperature Serial EEPROM with Permanent and Reversible Software Write Protect |
| AT34C02C-TP25-T | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:Two-wire Automotive Temperature Serial EEPROM with Permanent and Reversible Software Write Protect |
| AT34C02CU3-UU-T | 功能描述:电可擦除可编程只读存储器 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 |
| AT34C02CY6-YH-T | 功能描述:电可擦除可编程只读存储器 8 THIN MINI MAP 1.8V 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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