Rainbow-electronics MAX16064 User Manual download pdf (Page 30)

MAX16064

±0.3% Accurate, Quad, Power-Supply Controller with

Active-Voltage Output Control and PMBus Interface

30 ______________________________________________________________________________________

S = START CONDITION

SR = REPEATED START CONDITION

P = STOP CONDITION

= SLAVE TRANSMISSION

COMMAND

BYTE FOR

DEVICE 1

DATA BYTES

FOR DEVICE 1

SLAVE

ADDRESS OF

DEVICE 1

COMMAND BYTE

FOR DEVICE n: NO

DATA BYTE

SLAVE

ADDRESS OF

DEVICE n

COMMAND

BYTE FOR

DEVICE 2

DATA BYTES

FOR DEVICE 2

SLAVE

ADDRESS OF

DEVICE 2

COMMAND

BYTE FOR

DEVICE 3

DATA BYTES

FOR DEVICE 3

SLAVE

ADDRESS OF

DEVICE 3

DATA0 A DATA1 A

8 BITS 8 BITS

S ADDR1 W A CMD1 A

7 BITS 8 BITS

SR ADDRn W A CMDn A

7 BITS 8 BITS

DATA0 A

8 BITS

SR ADDR2 W A CMD2 A

7 BITS 8 BITS

DATA0 A DATA1 A

8 BITS 8 BITS

SR ADDR3 W A CMD3 A

7 BITS 8 BITS

PEC1

8 BITS

DATA1 A

8 BITS

PEC2

8 BITS

PEC3

8 BITS

PECn

8 BITS

A P

Figure 15. SMBus Group Command Protocol with PEC

SCL

SDA

A = START CONDITION

B = MSB OF ADDRESS CLOCKED INTO SLAVE

C = LSB OF ADDRESS CLOCKED INTO SLAVE

D = R/W BIT CLOCKED INTO SLAVE

E = SLAVE PULLS SDA LINE LOW

F = ACKNOWLEDGE BIT CLOCKED INTO MASTER

G = MSB OF DATA CLOCKED INTO MASTER

H = LSB OF DATA CLOCKED INTO MASTER

I = MASTER PULLS SDA LINE LOW

J = ACKNOWLEDGE CLOCKED INTO SLAVE

K = ACKNOWLEDGE CLEAR PULSE

L = STOP CONDITION

M = NEW START CONDITION

BCD

GHIJKLM

SU;STA

HD;STA

SU;DAT

HD;DAT

SU;STO

BUF

LOW

HIGH

Figure 16. SMBus Write Timing Diagram

1 2 ... 25 26 27 28 29 30 31 32 33 34 35 ... 51 52

MAX16064 1

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Rainbow-electronics MAX16064 User Manual Page 30

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