24lc01bt-st Microchip Technology Inc., 24lc01bt-st Datasheet - Page 6

• Manufacturer Part Number: 24lc01bt-st
• Description: 1k I2c Serial Eeprom
• Manufacturer: Microchip Technology Inc.

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 cares”
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.
DS21711G-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:
Start Bit
x = “don’t care”
S
1
Control Code
0
Slave Address
1
CONTROL BYTE
ALLOCATION
© 2007 Microchip Technology Inc.
0
x
Select
Block
Bits
x
Acknowledge Bit
Read/Write Bit
x
R/W ACK