M34S32MN datasheet(7/18 Pages) STMICROELECTRONICS

Part #	M34S32MN

Description	32K Serial I2C Bus EEPROM With User-Defined Read-Only Block and 32-Byte OTP Page

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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M34S32

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EEPROM Addressing. A data byte in the memory

is addressed through 2 bytes of address informa-

tion. The Most Significant Byte is sent first and the

Least significant Byte is sent after. Bits b15 to b0

form the address of any byte of the memory. Bits

b15 to b12 are don’t care on the M34S32 series.

Figure 7. AC Waveforms

Table 9. Most Significant Byte

b15

b14

b13

b12

b11

b10

b9

b8

XX

X

4. b15 to b12 are Don’t Care.

Table 10. Least Significant Byte

b7

b6

b5

b4

b3

b2

b1

b0

SCL

SDA IN

SCL

SDA OUT

SCL

SDA IN

tCHCL

tDLCL

tCHDX

START

CONDITION

tCLCH

tDXCX

tCLDX

SDA

INPUT

SDA

CHANGE

tCHDH

tDHDL

STOP &

BUS FREE

DATA VALID

tCLQV

tCLQX

DATA OUTPUT

tCHDH

STOP

CONDITION

tCHDX

START

CONDITION

WRITE CYCLE

tW

AI00795B

Write Operations

Following a START condition the master sends a

Device Select Byte with the RW bit reset to 0. The

memory acknowledges this and waits for 2 bytes

of address. These 2 address bytes (8 bits each)

provide access to any of the memory location.

Writing in the memory may be inhibited with WC

pin and WCpol bit (see Table 13 and Figure 11).

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