MAX6660EVKIT Maxim Integrated Products, MAX6660EVKIT Datasheet - Page 9

• Manufacturer Part Number: MAX6660EVKIT
• Description: EVAL KIT FOR MAX6660
• Manufacturer: Maxim Integrated Products

Specifications of MAX6660EVKIT

• Sensor Type: Temperature, Fan Controller
• Sensing Range: -40°C ~ 125°C
• Interface: SMBus (2-Wire/I²C)
• Sensitivity: ±1°C
• Voltage - Supply: 3 V ~ 5.5 V
• Embedded: No
• Utilized Ic / Part: MAX6660
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 5. SMBus Read Timing Diagram
Figure 3. SMBus Protocols
Figure 4. SMBus Write Timing Diagram
Write Byte Format
Read Byte Format
Send Byte Format
S = Start condition
P = Stop condition
S
SMBCLK
SMBDATA
S
S
ADDRESS
A = START CONDITION
B = MSB OF ADDRESS CLOCKED INTO SLAVE
C = LSB OF ADDRESS CLOCKED INTO SLAVE
D = R/W BIT CLOCKED INTO SLAVE
Slave Address: equiva-
lent to chip-select line
ADDRESS
7 bits
SMBCLK
SMBDATA
t
SU:STA
7 bits
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
Slave Address: equiva-
lent to chip-select line of
a 3-wire interface
Fan-Speed Regulator with SMBus Interface
ADDRESS
A
t
HD:STA
Remote-Junction Temperature-Controlled
7 bits
t
SU:STA
_______________________________________________________________________________________
WR
t
LOW
Shaded = Slave transmission
/// = Not acknowledged
A
WR
t
HD:STA
B
t
HIGH
ACK
t
LOW
ACK
WR
B
Command Byte: sends com-
mand with no data, usually
used for one-shot command
t
HIGH
t
COMMAND
SU:DAT
C
8 bits
Command Byte: selects
which register you are
reading from
COMMAND
E = SLAVE PULLS SMBDATA LINE LOW
F = ACKNOWLEDGE BIT CLOCKED INTO MASTER
G = MSB OF DATA CLOCKED INTO MASTER
H = LSB OF DATA CLOCKED INTO MASTER
t
SU:DAT
8 bits
ACK
C
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
D
ACK
Command Byte: selects which
register you are writing to
D
ACK
E
COMMAND
P
F
8 bits
E
F
S
Receive Byte Format
G
t
HD:DAT
S
Slave Address: repeated
due to change in data-
flow direction
ADDRESS
7 bits
G
ADDRESS
ACK
7 bits
I = MASTER PULLS DATA LINE LOW
J = ACKNOWLEDGE CLOCKED INTO SLAVE
K = ACKNOWLEDGE CLEAR PULSE
H
H
Data Byte: data goes into the register
set by the command byte (to set
thresholds, configuration masks, and
sampling rate)
RD
J = ACKNOWLEDGE CLOCKED INTO MASTER
K = ACKNOWLEDGE CLOCK PULSE
L = STOP CONDITION, DATA EXECUTED BY SLAVE
M = NEW START CONDITION
DATA
8 bits
RD
I
I
J
ACK
J K
ACK
K
Data Byte: reads from
the register set by the
command byte
Data Byte: reads data from
the register commanded
by the last Read Byte or
Write Byte transmission;
also used for SMBus Alert
Response return address
DATA
8 bits
DATA
8 bits
ACK
J = STOP CONDITION, DATA
K = NEW START CONDITION
t
SU:STO
EXECUTED BY SLAVE
L
t
SU:STO
t
BUF
///
M
///
L
t
BUF
P
1
M
P
P
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