
6
FN6189
.4
Dece
mber
17,
201
0
I2C Bus Format.
I2C Addressing
The ISL45041 will respond identically to either of two I2C address: 1001110x and
1001111x. 100111x is the preferred address. To prevent bus conflicts, ensure that
there are no other devices on the I2C bus with either of the above addresses.
FIGURE 4. ISL45041 I2C READ AND WRITE FORMAT
6 BIT ADDRESS
START
R/W
ACK
DATA
ACK
STOP
10
0
1
X
D7
D6
D5
D4
D3
D2
D1
A
ISL45041 I2C READ FORMAT
R/W = 0 = WRITE
R/W = 1 = READ
D0
START
BYTE 1
BYTE 2
MSB
LSB
MSB
LSB
6 BIT ADDRESS
START
R/W
ACK
DATA
PROGRAM
ACK
DON’T
CARE
STOP
10
0
1
0
XD7
D6
D5
D4
D3
D2
D1
P
A
ISL45041 I2C WRITE FORMAT
R/W = 0 = WRITE
R/W = 1 = READ
WHEN R/W = 0
P = 0 = EEPROM PROGRAMMING
P = 1 = REGISTER WRITE
BYTE 1
BYTE 2
MSB
LSB
MSB
LSB
DON’T
CARE
ISL45041