DS1864 Maxim Integrated Products, DS1864 Datasheet - Page 71

• Manufacturer Part Number: DS1864
• Description: SFP Laser Controller and Diagnostic IC
• Manufacturer: Maxim Integrated Products

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Figure 20. I
COMMUNICATIONS KEY
WRITE UP TO A 8-BYTE PAGE WITH A SINGLE TRANSACTION I
READ A SINGLE BYTE WITH A DUMMY WRITE CYCLE TO SET THE ADDRESS COUNTER FROM I
WRITE A SINGLE BYTE TO 2-WIRE ADDRESS A0h
READ MULTIPLE BYTES WITH A DUMMY WRITE CYCLE TO SET THE ADDRESS COUNTER FROM I
SR
S
P
S
S
S
S
1 0 1
1 0 1
1 0 1
1 0 1
START
STOP
REPEATED
START
2
C Communications Examples
0
0
0
0
A
N
0
0
0
0
DATA
0
0
0
0
X X X X X X X X
ACK
NOT
ACK
0 0
1 0
0 0
1 0
A
A
A
A
A
WHITE BOXES INDICATE THE MASTER IS
CONTROLLING SDA
SHADED BOXES INDICATE THE SLAVE IS
CONTROLLING SDA
MEMORY ADDRESS
MEMORY ADDRESS
MEMORY ADDRESS
MEMORY ADDRESS
____________________________________________________________________
2
8-BITS ADDRESS OR DATA
C ADDRESS A2h
DATA
A
A
A
A
SFP Laser Controller and
SR
SR
1 0 1
1 0 1
2
C ADDRESS A0h
2
C ADDRESS A2h
DATA
DATA
A
0
0
0
0
0
0
0 1
1 1
DATA
NOTE:
ALL BYTES ARE SENT MOST SIGNIFICANT BIT FIRST.
THE FIRST BYTE SENT AFTER A START CONDITION IS
ALWAYS THE SLAVE ADDRESS FOLLOWED BY THE
READ/WRITE BIT.
A
A
P
A
A
Diagnostic IC
N
DATA
DATA
P
DATA
N
A
A
P
P
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