Datasheet

ManualsBrandsLINEAR TECHNOLOGY ManualsPMICsPMIC - PoE controller QFN 38 (5x7) Controller (PSE)

LTC4274A/LTC4274C

12

4274acfc

I

2

C TIMING DIAGRAMS

Figure 6. Writing to a Register

Figure 7. Reading from a Register

SCL

SDA

4274AC F06

001

AD3 AD2 AD1 AD0 A7 A6 A5 A4 A3 A2 A1 A0

R/W

ACK

D7 D6 D5 D4 D3 D2 D1 D0

ACK ACK

START BY

MASTER

ACK BY

SLAVE

ACK BY

SLAVE

ACK BY

SLAVE

FRAME 1

SERIAL BUS ADDRESS BYTE

FRAME 2

REGISTER ADDRESS BYTE

FRAME 3

DATA BYTE

STOP BY

MASTER

SCL

SDA

001

AD3 AD2 AD1 AD0 A7 A6 A5 A4 A3 A2 A1 A0

R/W

ACK

ACK

001

AD3 AD2 AD1 AD0 D7 D6 D5 D4 D3 D2 D1 D0

R/W

ACK

ACK

START BY

MASTER

ACK BY

SLAVE

ACK BY

SLAVE

4274AC F07

STOP BY

MASTER

REPEATED

START BY

MASTER

ACK BY

SLAVE

NO ACK BY

MASTER

FRAME 1

SERIAL BUS ADDRESS BYTE

FRAME 2

REGISTER ADDRESS BYTE

FRAME 1

SERIAL BUS ADDRESS BYTE

FRAME 2

DATA BYTE