24LC256-E/MF Microchip Technology, 24LC256-E/MF Datasheet - Page 11

IC EEPROM 256KBIT 400KHZ 8DFN

24LC256-E/MF

Manufacturer Part Number
24LC256-E/MF
Description
IC EEPROM 256KBIT 400KHZ 8DFN
Manufacturer
Microchip Technology
Datasheet

Specifications of 24LC256-E/MF

Format - Memory
EEPROMs - Serial
Memory Type
EEPROM
Memory Size
256K (32K x 8)
Speed
400kHz
Interface
I²C, 2-Wire Serial
Voltage - Supply
2.5 V ~ 5.5 V
Operating Temperature
-40°C ~ 125°C
Package / Case
8-VDFN Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
7.0
Since the device will not acknowledge during a write
cycle, this can be used to determine when the cycle is
complete (This feature can be used to maximize bus
throughput). Once the Stop condition for a Write
command has been issued from the master, the device
initiates the internally timed write cycle. ACK polling
can be initiated immediately. This involves the master
sending a Start condition, followed by the control byte
for a Write command (R/W = 0). If the device is still
busy with the write cycle, then no ACK will be returned.
If no ACK is returned, the Start bit and control byte must
be resent. If the cycle is complete, then the device will
return the ACK and the master can then proceed with
the next Read or Write command. See Figure 7-1 for
flow diagram.
 2010 Microchip Technology Inc.
ACKNOWLEDGE POLLING
24AA256/24LC256/24FC256
FIGURE 7-1:
Initiate Write Cycle
Send Control Byte
Write Command
Acknowledge
with R/W = 0
Condition to
Did Device
(ACK = 0)?
Send Start
Send Stop
Operation
Send
Next
ACKNOWLEDGE
POLLING FLOW
YES
DS21203Q-page 11
NO

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