24AA01T MICROCHIP [Microchip Technology], 24AA01T Datasheet - Page 6

• Manufacturer Part Number: 24AA01T
• Description: 1K I2C Serial EEPROM
• Manufacturer: MICROCHIP [Microchip Technology]

24AA01/24LC01B
3.6
A control byte is the first byte received following the
Start condition from the master device. The control byte
consists of a four-bit control code. For the 24XX01, this
is set as ‘
The next three bits of the control byte are ‘don’t care’s’
for the 24XX01.
The last bit of the control byte defines the operation to
be performed. When set to ‘
selected. When set to ‘
Following the Start condition, the 24XX01 monitors the
SDA bus checking the device type identifier being
transmitted. Upon receiving a ‘
device outputs an Acknowledge signal on the SDA line.
Depending on the state of the R/W bit, the 24XX01 will
select a read or write operation.
DS21711C-page 6
Operation
Read
Write
Device Addressing
1010
’ binary for read and write operations.
Control
Code
1010
1010
0
’, a write operation is selected.
Block Address
Block Address
Block Select
1
1010
’, a read operation is
’ code, the slave
R/W
1
0
FIGURE 3-2:
X = ‘Don’t care’.
1
START
0
SLAVE ADDRESS
1
CONTROL BYTE
ALLOCATION
 2003 Microchip Technology Inc.
0
X
READ/WRITE
X
R/W
X
A