
9
FN8084.0
May 6, 2005
FIGURE 1. VALID DATA CHANGES, START, AND STOP CONDITIONS
FIGURE 2. ACKNOWLEDGE RESPONSE FROM RECEIVER
FIGURE 3. BYTE WRITE SEQUENCE
FIGURE 4. READ SEQUENCE
SDA
SCL
START
DATA
STABLE
DATA
CHANGE
STOP
DATA
STABLE
SDA OUTPUT FROM
TRANSMITTER
SDA OUTPUT FROM
RECEIVER
8
1
9
START
ACK
SCL FROM
MASTER
HIGH IMPEDANCE
HIGH IMPEDANCE
S
T
A
R
T
S
T
O
P
IDENTIFICATION
BYTE
ADDRESS
BYTE
DATA
BYTE
A
C
K
SIGNALS FROM
THE MASTER
SIGNALS FROM
THE ISL95311
A
C
K
0
0
1
1
A
C
K
WRITE
SIGNAL AT SDA
0 0 0 0
A
1
0
0
0 0
A
0
0
SIGNALS
FROM THE
MASTER
SIGNALS FROM
THE SLAVE
SIGNAL AT SDA
S
T
A
R
T
IDENTIFICATION
BYTE WITH
R/W=0
ADDRESS
BYTE
A
C
K
A
C
K
0
0
1
1
S
T
O
P
A
C
K
0
1
0
1
1
IDENTIFICATION
BYTE WITH
R/W=1
A
C
K
S
T
A
R
T
LAST READ
DATA BYTE
FIRST READ
DATA BYTE
A
C
K
0
0
0
0 0 0
0 0
0 A
1
A
0
0
A
1
A
0
ISL95311