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M24C02-R Datasheet(PDF) 4 Page - STMicroelectronics

Part No. M24C02-R
Description  16Kbit, 8Kbit, 4Kbit, 2Kbit and 1Kbit Serial I2C Bus EEPROM
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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M24C02-R Datasheet(HTML) 4 Page - STMicroelectronics

 
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SUMMARY DESCRIPTION
These I2C-compatible electrically erasable pro-
grammable memory (EEPROM) devices are orga-
nized as 2048/1024/512/256/128 x 8 (M24C16,
M24C08, M24C04, M24C02, M24C01).
Figure 2. Logic Diagram
I2C uses a two wire serial interface, comprising a
bi-directional data line and a clock line. The devic-
es carry a built-in 4-bit Device Type Identifier code
(1010) in accordance with the I2C bus definition.
The device behaves as a slave in the I2C protocol,
with all memory operations synchronized by the
serial clock. Read and Write operations are initiat-
ed by a Start condition, generated by the bus mas-
ter. The Start condition is followed by a Device
Select Code and RW bit (as described in Table 2.),
terminated by an acknowledge bit.
When writing data to the memory, the device 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 after a
NoAck for Read.
Table 1. Signal Names
Power On Reset: VCC Lock-Out Write Protect
In order to prevent data corruption and inadvertent
Write operations during Power-up, a Power On
Reset (POR) circuit is included. At Power-up, the
internal reset is held active until VCC has reached
the POR threshold value, and all operations are
disabled – the device will not respond to any com-
mand. In the same way, when VCC drops from the
operating voltage, below the POR threshold value,
all operations are disabled and the device will not
respond to any command.
A stable and valid VCC (as defined in Table 6. and
Table 7.) must be applied before applying any log-
ic signal.
Figure 3. DIP, SO, TSSOP and MLP Connections (Top View)
Note: 1. NC = Not Connected
2. See PACKAGE MECHANICAL section for package dimensions, and how to identify pin-1.
AI02033
3
E0-E2
SDA
VCC
M24Cxx
WC
SCL
VSS
E0, E1, E2
Chip Enable
SDA
Serial Data
SCL
Serial Clock
WC
Write Control
VCC
Supply Voltage
VSS
Ground
SDA
VSS
SCL
WC
VCC
/ E2
AI02034E
M24Cxx
1
2
3
4
8
7
6
5
/ E2
/ E2
/ E2
NC
/ E1
/ E1
/ E1
/ NC
NC
/ E0
/ E0
/ NC
/ NC
NC
/1Kb
/2Kb
/4Kb
/8Kb
16Kb


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