M24M01V-LA6T 查看數據表（PDF） - STMicroelectronics

零件编号

产品描述 (功能)

生产厂家

M24M01V-LA6T

1 Mbit Serial I²C Bus EEPROM

STMicroelectronics 

M24M01

SUMMARY DESCRIPTION

The M24M01 is a 1 Mbit (131,072 x 8) electrically

erasable programmable memory (EEPROM) ac-

cessed by an I2C-compatible bus.

Figure 2. Logic Diagram

VCC

2

E1-E2

SCL

WC

M24M01

SDA

VSS

AI04048B

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.

Figure 3. LGA Connections

DU

E1

E2

VSS

M24M01

1

8

2

7

3

6

4

5

VCC

WC

SCL

SDA

AI04051C

Table 1. Signal Names

E1, E2

Chip Enable

SDA

Serial Data

SCL

Serial Clock

WC

Write Control

VCC

VSS

Supply Voltage

Ground

These devices are compatible with the I2C memo-

ry protocol. This is a two wire serial interface that

uses a bi-directional data bus and serial clock. The

devices carry a built-in 4-bit Device Type Identifier

code (1010) in accordance with the I2C bus defini-

tion.

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.

Note: 1. DU = Don’t Use (should be left unconnected, or tied to

VSS)

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. 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 command. In the

same way, when VCC drops from the operating

voltage, below the POR threshold value, all oper-

ations are disabled and the device will not respond

to any command. A stable and valid VCC must be

applied before applying any logic signal.

When the power supply is turned on, VCC rises

from VSS to VCC(min), passing through a value Vth

in between. The device ignores all instructions un-

til a time delay of tPU has elapsed after the mo-

ment that VCC rises above the Vth threshold.

However, the correct operation of the device is not

guaranteed if, by this time, VCC is still below

VCC(min).No instructions should be sent until the

later of:

– tPU after VCC passed the Vth threshold

– VCC passed the VCC(min) level

These values are specified in Table 9.

2/19

Share Link: