MAX6633(2001) View Datasheet(PDF) - Maxim Integrated

Part Name

Description

Manufacturer

MAX6633
(Rev.:2001)

12-Bit Plus Sign Temperature Sensors with SMBus/I2C-Compatible Serial Interface

Maxim Integrated 

12-Bit Plus Sign Temperature Sensors with

SMBus/I2C-Compatible Serial Interface

Write Byte Format

S

ADDRESS

WR

7 bits

Slave Address:

equivalent

to chip-select line of a 3-

wire interface

ACK

COMMAND

ACK

8 bits

Command Byte: selects

register you are writing to

DATA

ACK

P

8 bits

Data Byte: data goes into the register set by the

command byte

Write Word Format

S

ADDRESS

WR

ACK COMMAND ACK DATA ACK

DATA

ACK

P

7 bits

8 bits

8 bits

(MSB)

8 bits

(LSB)

Slave Address:

equivalent to chip-select

Command Byte:

selects register you

Data Bytes: data goes into the

register set by the command

line of a

are writing to

byte

3-wire interface

Read Byte Format

S ADDRESS WR ACK COMMAND ACK S ADDRESS RD

ACK

7 bits

8 bits

7 bits

Slave Address: equivalent

to chip-select line

Command Byte:

selects register you

are reading from

Slave Address: repeated due to

change in data-flow direction

DATA

///

P

8 bits

Data Byte: reads from the

register set by the command

byte

Read Word Format

S ADDRESS WR ACK COMMAND ACK S ADDRESS RD ACK DATA ACK DATA /// P

7 bits

8 bits

7 bits

8 bits

(MSB)

8 bits

(LSB)

Slave Address:

equivalent to chip-

Command Byte:

selects register you

Slave Address: repeated Data Bytes: reads from the

due to change in data-flow register set by the command

select line

are reading from

direction

byte

S = Start condition

P = Stop condition

Shaded = Slave transmission

/// = Not acknowledged

Figure 1. SMBus Protocols

A

B

C

D

EF

G

tLOW tHIGH

SMBCLK

H

I JK

LM

SMBDATA

tSU:STA tHD:STA

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 SMBDATA LINE LOW

Figure 2. SMBus Write Timing Diagram

tSU:DAT

tHD:DAT

F = ACKNOWLEDGE BIT CLOCKED INTO MASTER

G = MSB OF DATA CLOCKED INTO SLAVE

H = LSB OF DATA CLOCKED INTO SLAVE

I = SLAVE PULLS SMBDATA LINE LOW

tSU:STO tBUF

J = ACKNOWLEDGE CLOCKED INTO MASTER

K = ACKNOWLEDGE CLOCK PULSE

L = STOP CONDITION, DATA EXECUTED BY SLAVE

M = NEW START CONDITION

6 _______________________________________________________________________________________

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