24LC32AFT-E/OT Microchip Technology, 24LC32AFT-E/OT Datasheet - Page 10

• Manufacturer Part Number: 24LC32AFT-E/OT
• Description: 32K, 4K X 8, 2.5V SER EE EXT, 1/4 ARRAY WRITE PROTECT 5 SOT-23 2x3x0.8mm T/R
• Manufacturer: Microchip Technology

Specifications of 24LC32AFT-E/OT

• Format - Memory: EEPROMs - Serial
• Memory Type: EEPROM
• Memory Size: 32K (4K 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: SOT-23-5, SC-74A, SOT-25
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

24AA32AF/24LC32AF
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 then 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 re-sent. If the cycle is complete, 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 of this operation.
DS22184A-page 10
ACKNOWLEDGE POLLING
FIGURE 7-1:
Initiate Write Cycle
Send Control Byte
Write Command
with R/W = 0
Condition to
Acknowledge
Send Stop
Send Start
Did Device
(ACK = 0)?
Operation
Send
Next
ACKNOWLEDGE POLLING
FLOW
© 2009 Microchip Technology Inc.
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