M24256-BRBN6P datasheet(8/25 Pages) STMICROELECTRONICS

Part #	M24256-BRBN6P

Description	256Kbit and 128Kbit Serial I2C Bus EEPROM With Three Chip Enable Lines

Download	25 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

Logo

8 / 25 page

M24128-BW, M24128-BR, M24256-BW, M24256-BR

8/25

Figure 6. Write Mode Sequences with WC=1 (data write inhibited)

Write Operations

Following a Start condition the bus master sends

a Device Select Code with the R/W bit (RW) reset

to 0. The device acknowledges this, as shown in

Figure 7., and waits for two address bytes. The de-

vice responds to each address byte with an ac-

knowledge bit, and then waits for the data byte.

Writing to the memory may be inhibited if Write

Control (WC) is driven High. Any Write instruction

with Write Control (WC) driven High (during a pe-

riod of time from the Start condition until the end of

the two address bytes) will not modify the memory

contents, and the accompanying data bytes are

not acknowledged, as shown in Figure 6..

Each data byte in the memory has a 16-bit (two

byte wide) address. The Most Significant Byte (Ta-

ble 4.) is sent first, followed by the Least Signifi-

cant Byte (Table 5.). Bits b15 to b0 form the

address of the byte in memory.

When the bus master generates a Stop condition

immediately after the Ack bit (in the “10th bit” time

slot), either at the end of a Byte Write or a Page

Write, the internal memory Write cycle is triggered.

A Stop condition at any other time slot does not

trigger the internal Write cycle.

After the Stop condition, the delay tW, and the suc-

cessful completion of a Write operation, the de-

vice’s internal address counter is incremented

automatically, to point to the next byte address af-

ter the last one that was modified.

During the internal Write cycle, Serial Data (SDA)

is disabled internally, and the device does not re-

spond to any requests.

Byte Write

After the Device Select code and the address

bytes, the bus master sends one data byte. If the

addressed location is Write-protected, by Write

Control (WC) being driven High, the device replies

BYTE WRITE

DEV SEL

BYTE ADDR

DATA IN

WC

PAGE WRITE

DEV SEL

BYTE ADDR

DATA IN 1

WC

DATA IN 2

AI01120C

PAGE WRITE

(cont'd)

WC (cont'd)

DATA IN N

ACK

NO ACK

R/W

ACK

NO ACK

R/W

NO ACK

Similar Part No. - M24256-BRBN6P

Manufacturer	Part #	Datasheet	Description
STMicroelectronics	M24256-BR	265Kb / 31P	512 Kbit and 256 Kbit Serial I2C bus EEPROM with three Chip Enable lines
	M24256-BR	321Kb / 35P	512 Kbit and 256 Kbit serial I짼C bus EEPROM with three Chip Enable lines
	M24256-BR	507Kb / 42P	256 Kbit serial I짼C bus EEPROM with three Chip Enable lines
	M24256-BR	415Kb / 40P	256-Kbit serial I짼C bus EEPROM
	M24256-BR	716Kb / 39P	256-Kbit serial I짼C bus EEPROM

More results

Similar Description - M24256-BRBN6P

Manufacturer	Part #	Datasheet	Description
STMicroelectronics	M24512-W	265Kb / 31P	512 Kbit and 256 Kbit Serial I2C bus EEPROM with three Chip Enable lines
	M95128	580Kb / 39P	256Kbit and 128Kbit Serial SPI Bus EEPROM With High Speed Clock October 2004
	M24256-BF	507Kb / 42P	256 Kbit serial I짼C bus EEPROM with three Chip Enable lines
	M24256-B	172Kb / 19P	256/128 Kbit Serial IC Bus EEPROM With Three Chip Enable Lines
	M24512-W	321Kb / 35P	512 Kbit and 256 Kbit serial I짼C bus EEPROM with three Chip Enable lines
Catalyst Semiconductor	CAT24AC128	474Kb / 11P	128kbit I2C Serial CMOS EEPROM With Three Chip Address Input Pins
Catalyst Semiconductor	CAT24AC128	666Kb / 11P	128kbit I2C Serial CMOS EEPROM With Three Chip Address Input Pins
Sanyo Semicon Device	LE25LB1282TT	256Kb / 14P	Serial SPI EEPROM (SPI Bus)(128Kbit)
Asahi Kasei Microsystem...	AK6516C	129Kb / 17P	SPI bus 256Kbit Serial CMOS EEPROM
STMicroelectronics	M24256-A	176Kb / 20P	256 Kbit Serial I C Bus EEPROM With Two Chip Enable Lines

More results

M24256-BRBN6P Datasheet(PDF) 8 Page - STMicroelectronics

M24256-BRBN6P Datasheet(HTML) 8 Page - STMicroelectronics

Similar Part No. - M24256-BRBN6P

Similar Description - M24256-BRBN6P

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25

Datasheet Download

Link URL