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MAX6640AEE Datasheet

  • MAX6640AEE

  • 2-Channel Temperature Monitor with Dual Automatic PWM Fan-Sp...

  • 722.10KB

  • 22页

  • MAXIM   MAXIM

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2-Channel Temperature Monitor with Dual
Automatic PWM Fan-Speed Controller
MAX6640
Table 3. Register Map (continued)
READ/
WRITE
REGISTER
POR
FUNCTION
NO.
STATE
ADDRESS
12h
D7
D6
D5
D4
D3
D2
D1
D0
R/W
RPM step-
Fan 1
Start
RPM
Start
RPM step- RPM step-
0000
Start step- Start step-
step-size step-size step-size
configuration size B
0000
size B
size B
size B
size B (LSB)
2b
(MSB)
B
B (LSB) B (MSB)
Fan 1
0100
configuration
0001
3
Fan 2
1000
configuration
0010
1
Spin-up
disable
PWM
mode
Pulse
Fan PWM
THERM
to
full-speed stretching Reserved Reserved Reserved frequency
disable
enable
(MSB)
Step-size Fan 2
Fan 2
Step-size
Step-size
delay
delay channel 1 channel 2
delay
(MSB)
(LSB)
control
control
RPM
range
select
PWM
100%
duty
cycle
Fan PWM
frequency
(LSB)
RPM range
select
Minimum fan
speed
0 = 0%, 1=
value in 22h
R/W
13h
R/W
14h
R/W
15h
Fan 2
Temp
Temp
RPM step-
RPM
0000
RPM step- RPM step-
configuration size A
step-size step-size step-size
0000
size A
size A
2a
(MSB)
A (LSB) A (MSB) A (LSB)
R/W
16h
Fan 2
Start
RPM step-
RPM
Start
0000
RPM step- RPM step-
Start step- Start step-
configuration size B
step-size step-size step-size
0000
size B
size B
size B
size B (LSB)
2b
(MSB)
B
B (LSB) B (MSB)
Fan 2
0100
configuration
0001
3
1111
1111
1111
1111
Fan 1
tachometer
count
Fan 2
tachometer
count
Fan 1 max
tach count/
target tach
count
Fan 2 max
tach count/
target tach
count
Pulses per
revolution/
fan 1
minimum
tach count
Pulses per
revolution/
fan 2
minimum
tach count
Spin-up
disable
Pulse
Fan PWM
THERM
to
full-speed stretching Reserved Reserved Reserved frequency
(MSB)
disable
enable
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Fan PWM
frequency
(LSB)
LSB
R/W
17h
R
20h
MSB
R
21h
MSB
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
LSB
R/W
22h
1111
1111
MSB
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
LSB
R/W
23h
1111
1111
MSB
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
LSB
R/W
24h
0100
0000
Pulse per Pulse per Fan 1 min Fan 1 min Fan 1 min Fan 1 min Fan 1 min
revolution revolution tach count
tach
tach
tach
tach
(MSB)
(LSB)
count
count
count
count
(MSB)
Fan 1 min
tach count
(LSB)
R/W
25h
0100
0000
Pulse per Pulse per Fan 2 min Fan 2 min Fan 2 min Fan 2 min Fan 2 min
tach
tach
tach
tach
revolution revolution tach count
(MSB)
(MSB)
(LSB)
count
count
count
count
Fan 2 min
tach count
(LSB)
R
26h
0000 Fan 1 current
0000
duty cycle
MSB
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
LSB
12
______________________________________________________________________________________

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