参数资料
| 型号： | 24FC64FT-I/ST |
| 厂商： | Microchip Technology |
| 文件页数： | 11/44页 |
| 文件大小： | 0K |
| 描述： | IC EEPROM 64KBIT 1MHZ 8TSSOP |
| 标准包装： | 2,500 |
| 格式 - 存储器： | EEPROMs - 串行 |
| 存储器类型： | EEPROM |
| 存储容量： | 64K (8K 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-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 8-TSSOP |
| 包装： | 带卷 (TR) |
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24AA64/24LC64/24FC64
8.0 READ OPERATION
Read operations are initiated in the same way as write
operations, with the exception that the R/W bit of the
control byte is set to one. There are three basic types
of read operations: current address read, random read
and sequential read.
This terminates the write operation, but not before
the internal Address Pointer is set. The master then
issues the control byte again, but with the R/W bit set
to a one. The 24XX64 will then issue an acknowl-
edge and transmit the 8-bit data word. The master
will not acknowledge the transfer, but does generate
a Stop condition, which causes the 24XX64 to
8.1
Current Address Read
discontinue transmission (Figure 8-2). After a
random Read command, the internal address coun-
The 24XX64 contains an address counter that main-
tains the address of the last word accessed, internally
ter will point to the address location following the one
that was just read.
incremented by one. Therefore, if the previous read
access was to address ‘n’ (n is any legal address), the
8.3
Sequential Read
next current address read operation would access data
from address n + 1 .
Upon receipt of the control byte with R/W bit set to one,
the 24XX64 issues an acknowledge and transmits the
eight-bit data word. The master will not acknowledge
the transfer, but does generate a Stop condition and the
24XX64 discontinues transmission (Figure 8-1).
Sequential reads are initiated in the same way as
random reads, except that once the 24XX64 transmits
the first data byte, the master issues an acknowledge as
opposed to the Stop condition used in a random read.
This acknowledge directs the 24XX64 to transmit the
next sequentially-addressed 8-bit word (Figure 8-3).
Following the final byte being transmitted to the master,
the master will NOT generate an acknowledge, but will
8.2
Random Read
generate a Stop condition. To provide sequential reads,
the 24XX64 contains an internal Address Pointer which
Random read operations allow the master to access
any memory location in a random manner. To
perform this type of read operation, the word address
must first be set. This is accomplished by sending
the word address to the 24XX64 as part of a write
operation (R/W bit set to ‘ 0 ’). Once the word address
is sent, the master generates a Start condition
following the acknowledge.
is incremented by one at the completion of each
operation. This Address Pointer allows the entire
memory contents to be serially read during one opera-
tion. The internal Address Pointer will automatically roll
over from address 1FFF to address 0000 if the master
acknowledges the byte received from the array address
1FFF.
FIGURE 8-1:
CURRENT ADDRESS READ
Bus Activity
Master
S
T
A
R
T
Control
Byte
Data (n)
S
T
O
P
SDA Line
Bus Activity
S
A
C
K
N
O
A
C
K
P
? 1997-2012 Microchip Technology Inc.
DS21189S-page 11
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 24FC64-I/CS16K | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:64K I2C? Serial EEPROM |
| 24FC64-I/MC | 功能描述:电可擦除可编程只读存储器 64K 8KX8 2.5V HI-SP SER EE IND 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 |
| 24FC64-I/MF | 功能描述:电可擦除可编程只读存储器 64K 8KX8 2.5V HI-SP SER EE IND 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 |
| 24FC64-I/MNY | 功能描述:电可擦除可编程只读存储器 64K 8K X 8 2.5V HI-SPEED SER EE IND 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 |
| 24FC64-I/MS | 功能描述:电可擦除可编程只读存储器 64K 8KX8 2.5V HI-SP SER EE IND 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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