24AA32AT-I/CS16K Microchip Technology, 24AA32AT-I/CS16K Datasheet - Page 10

• Manufacturer Part Number: 24AA32AT-I/CS16K
• Description: IC, EEPROM, 32KBIT, SERIAL, 400KHZ, CS-8
• Manufacturer: Microchip Technology

Specifications of 24AA32AT-I/CS16K

• Memory Size: 32Kbit
• Memory Configuration: 4K X 8
• Ic Interface Type: I2C
• Clock Frequency: 400kHz
• Supply Voltage Range: 1.7V To 5.5V
• Memory Case Style: CS
• No. Of Pins: 8
• Rohs Compliant: Yes

24AA32A/24LC32A
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.
DS21713K-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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