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AT24C02A/04A
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
(2K) or fifteen (4K) more data words. The EEPROM will respond with a “0” after each
data word received. The microcontroller must terminate the page write sequence with a
stop condition, see Figure 9.
Figure 9. Page Write
S
T
A
R
T
DEVICE
ADDRE SS
W
R
I
T
E
WORD ADDRE SS (n)
DATA (n)
DATA (n + 1)
DATA (n + x)
S
T
O
P
S DA LINE
M
S
B
L R A
S / C
B W K
A
C
K
A
C
K
A
C
K
A
C
K
The data word address lower three (2K) or four (4K) bits are internally incremented fol-
lowing 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, inter-
nally generated, reaches the page boundary, the following byte is placed at the
beginning of the same page. If more than eight (2K) or sixteen (4K) 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 “0” allowing the read or write sequence to continue.
9
0976Q–SEEPR–8/05
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AT24C04AN-10SI-2.7 SL383
功能描述:IC EEPROM 4KBIT 400KHZ 8SOIC RoHS:否 类别:集成电路 (IC) >> 存储器 系列:- 标准包装:96 系列:- 格式 - 存储器:闪存 存储器类型:FLASH 存储容量:16M（2M x 8，1M x 16） 速度:70ns 接口:并联 电源电压:2.65 V ~ 3.6 V 工作温度:-40°C ~ 85°C 封装/外壳:48-TFSOP（0.724"，18.40mm 宽） 供应商设备封装:48-TSOP 包装:托盘
AT24C04AN-10SI-2.7-T
功能描述:IC EEPROM 4KBIT 400KHZ 8SOIC 制造商:microchip technology 系列:- 包装:带卷（TR） 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:4Kb （512 x 8） 时钟频率:400kHz 写周期时间 - 字，页:5ms 访问时间:900ns 存储器接口:I2C 电压 - 电源:2.7 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（0.154"，3.90mm 宽） 供应商器件封装:8-SOIC 基本零件编号:AT24C04 标准包装:3,000
AT24C04AN-10SQ-2.7
制造商:Atmel Corporation 功能描述:
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AT24C04AN-10SU-2.7
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AT24C04AN-10SU-2.7 SL383
制造商:Atmel Corporation 功能描述:EEPROM Serial-2Wire 4K-bit 512 x 8 3.3V/5V 8-Pin SOIC T/R
AT24C04AY1-10YI-1.8
制造商:未知厂家 制造商全称:未知厂家 功能描述:EEPROM
AT24C04AY1-10YI-2.7
制造商:未知厂家 制造商全称:未知厂家 功能描述:EEPROM