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参数资料
| 型号： | FM24C64FLEMT8 |
| 英文描述： | I2C Serial EEPROM |
| 中文描述： | I2C串行EEPROM的 |
| 文件页数： | 3/14页 |
| 文件大小： | 103K |
| 代理商： | FM24C64FLEMT8 |
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www.fairchildsemi.com
FM24C16U/17U Rev. A.3
FM24C16U/17U
–
16K-Bit
Standard
2-Wire
Bus
Interface
Serial
EEPROM
Write Operations
BYTE WRITE
For a write operation, a second address field is required which is a
word address that is comprised of eight bits and provides access to
any one of the 256 bytes in the selected page of memory. Upon
receipt of the byte address, the FM24C16U/17U responds with an
acknowledge and waits for the next eight bits of data, again,
responding with an acknowledge. The master then terminates the
transfer by generating a stop condition at which time the FM24C16U/
17U begins the internal write cycle to the nonvolatile memory. While
the internal write cycle is in progress, the FM24C16U/17U inputs
are disabled, and the device will not respond to any requests from
the master for the duration of t
WR. Refer to Figure 4 for the address,
acknowledge, and data transfer sequence.
PAGE WRITE
To minimize write cycle time, FM24C16U/17U offer Page Write
feature, by which, up to a maximum of 16 contiguous byte
locations can be programmed all at once (instead of 16 individual
byte writes). To facilitate this feature, the memory array is orga-
nized in terms of “Pages.” A Page consists of 16 contiguous byte
locations starting at every 16-Byte address boundary (for ex-
ample, starting at array address 0x00, 0x10, 0x20 etc.). Page
Write operation limits access to byte locations within a page. In
other words a single Page Write operation will not cross over to
locations on another page but will “roll over” to the beginning of the
page whenever end of Page is reached and additional locations
are continued to be accessed. A Page Write operation can be
initiated to begin at any location within a page (starting address of
the Page Write operation need not be the starting address of a
Page).
S
T
O
P
Bus Activity:
Master
SDA Line
Bus Activity:
EEPROM
DATA n + 15
DATA n + 1
DATA n
WORD ADDRESS (n)
A
C
K
S
T
A
R
T
SLAVE
ADDRESS
A
C
K
A
C
K
A
C
K
A
C
K
S
T
O
P
A
C
K
DATA
A
C
K
A
C
K
S
T
A
R
T
WORD
ADDRESS
SLAVE
ADDRESS
Bus Activity:
Master
SDA Line
Bus Activity:
EEPROM
Page Write is initiated in the same manner as the Byte Write
operation; but instead of terminating the cycle after transmitting
the first data byte, the master can further transmit up to 15 more
bytes. After the receipt of each byte, FM24C16U/17U will respond
with an acknowledge pulse, increment the internal address counter
to the next address, and is ready to accept the next data. If the
master should transmit more than sixteen bytes prior to generat-
ing the STOP condition, the address counter will “roll over” and
previously written data will be overwritten. As with the Byte Write
operation, all inputs are disabled until completion of the internal
write cycle. Refer to
Figure 5 for the address, acknowledge, and
data transfer sequence.
Acknowledge Polling
Once the stop condition is issued to indicate the end of the host’s
write operation, the FM24C16U/17U initiates the internal write
cycle. ACK polling can be initiated immediately. This involves
issuing the start condition followed by the slave address for a write
operation. If the FM24C16U/17U is still busy with the write
operation, no ACK will be returned. If the FM24C16U/17U has
completed the write operation, an ACK will be returned and the
host can then proceed with the next read or write operation.
Write Protection (FM24C17U Only)
Programming of the upper half (upper 8Kbit) of the memory will not
take place if the WP pin of the FM24C17U is connected to VCC.
The FM24C17U will respond to slave and byte addresses; but if
the memory accessed is write protected by the WP pin, the
FM24C17U will not generate an acknowledge after the first byte
of data has been received. Thus the program cycle will not be
started when the stop condition is asserted.
Byte Write (Figure 4)
Page Write (Figure 5)
相关PDF资料 |
PDF描述 |
|---|---|
| FM24C64FLEMT8X | I2C Serial EEPROM |
| FM24C64FLEN | I2C Serial EEPROM |
| FM24C64FLM8 | I2C Serial EEPROM |
| FM24C64FLM8X | CONNECTOR |
| FM24C64FLMT8 | I2C Serial EEPROM |
相关代理商/技术参数 |
参数描述 |
|---|---|
| FM24C64FLEMT8X | 制造商:未知厂家 制造商全称:未知厂家 功能描述:I2C Serial EEPROM |
| FM24C64FLEN | 制造商:未知厂家 制造商全称:未知厂家 功能描述:I2C Serial EEPROM |
| FM24C64FLM8 | 功能描述:电可擦除可编程只读存储器 SOIC-8 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 |
| FM24C64FLM8X | 功能描述:电可擦除可编程只读存储器 SOIC-8 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 |
| FM24C64FLMT8 | 功能描述:电可擦除可编程只读存储器 TSSOP-8 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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