LTC4266 LINER [Linear Technology], LTC4266 Datasheet - Page 11

• Manufacturer Part Number: LTC4266
• Description: Quad IEEE 802.3at Power over Ethernet Controller
• Manufacturer: LINER [Linear Technology]

I
SDA
SCL
2
C TIMING DIAGRAMS
0
START BY
MASTER
1
SERIAL BUS ADDRESS BYTE
0
SDA
SCL
AD3 AD2 AD1 AD0
FRAME 1
0
START BY
MASTER
1
SERIAL BUS ADDRESS BYTE
R/W ACK
SDA
SDA
0
SCL
SCL
AD3 AD2 AD1 AD0
FRAME 1
A7
0
0
START BY
MASTER
START BY
MASTER
ACK BY
SLAVE
Figure 8. Reading the Interrupt Register (Short Form)
A6
REGISTER ADDRESS BYTE
ALERT RESPONSE ADDRESS BYTE
0
1
SERIAL BUS ADDRESS BYTE
Figure 9. Reading from Alert Response Address
A5
0
0
FRAME 2
R/W ACK
A4
AD3 AD2 AD1 AD0
1
FRAME 1
FRAME 1
A3
Figure 7. Reading from a Register
1
Figure 6. Writing to a Register
A2
A7
0
ACK BY
SLAVE
ACK BY
A1
A6
SLAVE
REGISTER ADDRESS BYTE
0
A0
A5
R/W ACK
R/W ACK
FRAME 2
ACK
A4
A3
D7
0
ACK BY
SLAVE
ACK BY
SLAVE
A2
0
D6
1
SERIAL BUS ADDRESS BYTE
ACK BY
A1
1
REPEATED
START BY
MASTER
SLAVE
D5
0
SERIAL BUS ADDRESS BYTE
A0
0
DATA BYTE
AD3
D4
FRAME 2
FRAME 2
ACK
AD3 AD2 AD1 AD0
AD2 AD1 AD0
D3
FRAME 1
D7
D2
NO ACK BY
NO ACK BY
D6
MASTER
MASTER
D1
D5
D0
1
DATA BYTE
R/W ACK
D4
FRAME 3
ACK
ACK
D3
4266 F08
4266 F09
STOP BY
MASTER
STOP BY
MASTER
D2
D7
ACK BY
SLAVE
D1
D6
ACK BY
SLAVE
D0
D5
DATA BYTE
FRAME 2
ACK
D4
4266 F06
D3
STOP BY
MASTER
D2
LTC4266
NO ACK BY
MASTER
D1
D0
ACK
11
4266 F07
STOP BY
MASTER
4266fb