參數(shù)資料
型號: M14256
廠商: 意法半導(dǎo)體
英文描述: Memory Card IC 256K Bit Serial IIC Bus EEPROM(256K位串行IIC總線EEPROM)
中文描述: 記憶卡IC 256K位串行IIC總線的EEPROM(256K位串行總線EEPROM的國際進(jìn)口許可證)
文件頁數(shù): 2/2頁
文件大?。?/td> 33K
代理商: M14256
M14256, M14128
2/2
M14128 in wafer form, please contact your ST
sales office.
Each memory is compatible with the I
2
C extended
memory standard. This is a two wire serial inter-
face that uses a bi-directional data bus and serial
clock. The memory carries a built-in 7-bit unique
Device Type Identifier code (1010000) in accord-
ance with the I
2
C bus definition. Only one memory
can be attached to each I
2
C bus.
The memory behaves as a slave device in the I
2
C
protocol, with all memory operations synchronized
by the serial clock. Read and write operations are
initiated by a START condition, generated by the
bus master. The START condition is followed by
the Device Select Code which is composed of a
stream of 7 bits (1010000), plus one read/write bit
(R/W) and is terminated by an acknowledge bit.
When writing data to the memory, the memory in-
serts an acknowledge bit during the 9th bit time,
following the bus master’s 8-bit transmission.
When data is read by the bus master, the bus
master acknowledges the receipt of the data byte
in the same way. Data transfers are terminated by
a STOP condition after an Ack for WRITE, and af-
ter a NoAck for READ.
Figure 2. D22 Contact Connections
AI02204
VCC
GND
SCL
SDA
WC
Table 2. Ordering Information Scheme
Devices are shipped from the factory with the memory content set at all ‘1’s (FFh).
For a list of available options (speed, package, etc...) or for further information on any aspect of this device,
please contact the ST Sales Office nearest to you.
Example:
M14256
-
W
D22
Delivery Form
D22
Module on Super 35 mm
film
Memory Capacity
256
256 Kbit
Operating Voltage
128
128 Kbit
W
2.5 V to 5.5 V
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