Rainbow-electronics MAX6640 Manual do Utilizador descarregar pdf (Página 12)

MAX6640

2-Channel Temperature Monitor with Dual

Automatic PWM Fan-Speed Controller

12 ______________________________________________________________________________________

READ/

WRITE

REGISTER

NO.

ADDRESS

POR

STATE

FUNCTION

D7 D6 D5 D4 D3 D2 D1 D 0

R/W

12h

0000

0000

Fan 1

configuration

2b

RPM step-

size B

(MSB)

RPM step-

size B

RPM step-

size B

RPM

step-size

B (LSB)

Start

step-size

B (MSB)

Start

step-size

B

Start step-

size B

S tar t step -

si ze B ( LS B)

R/W

13h

0100

0001

Fan 1

configuration

3

Spin-up

disable

THERM to

full-speed

enable

Pulse

stretching

disable

Reserved Reserved Reserved

Fan PWM

frequency

(MSB)

Fan P WM

fr eq uency

( LSB)

R/W

14h

1000

0010

Fan 2

configuration

1

PWM

mode

Step-size

delay

(MSB)

Step-size

delay

Step-size

delay

(LSB)

Fan 2

channel 1

control

Fan 2

channel 2

control

RPM

range

select

RP M r ang e

select

R/W

15h

0000

0000

Fan 2

configuration

2a

RPM step-

size A

(MSB)

RPM step-

size A

RPM step-

size A

RPM

step-size

A (LSB)

Temp

step-size

A (MSB)

Temp

step-size

A (LSB)

PWM

100%

duty

cycle

M i ni m um fan

sp eed

0 = 0%, 1=

value in 22h

R/W

16h

0000

0000

Fan 2

configuration

2b

RPM step-

size B

(MSB)

RPM step-

size B

RPM step-

size B

RPM

step-size

B (LSB)

Start

step-size

B (MSB)

Start

step-size

B

Start step-

size B

S tar t step -

si ze B ( LS B)

R/W

17h

0100

0001

Fan 2

configuration

3

Spin-up

disable

THERM to

full-speed

enable

Pulse

stretching

disable

Reserved Reserved Reserved

Fan PWM

frequency

(MSB)

Fan P WM

fr eq uency

( LSB)

R 20h

1111

1111

Fan 1

tachometer

count

MSB — — — — — — LS B

R 21h

1111

1111

Fan 2

tachometer

count

MSB — — — — — — LS B

R/W

22h

1111

1111

Fan 1 max

tach count/

target tach

count

MSB — — — — — — LS B

R/W

23h

1111

1111

Fan 2 max

tach count/

target tach

count

MSB — — — — — — LS B

R/W

24h

0100

0000

Pulses per

revolution/

fan 1

minimum

tach count

Pulse per

revolution

(MSB)

Pulse per

revolution

(LSB)

Fan 1 min

tach count

(MSB)

Fan 1 min

tach

count

Fan 1 min

tach

count

Fan 1 min

tach

count

Fan 1 min

tach

count

Fan 1 mi n

tach count

( LSB)

R/W

25h

0100

0000

Pulses per

revolution/

fan 2

minimum

tach count

Pulse per

revolution

(MSB)

Pulse per

revolution

(LSB)

Fan 2 min

tach count

(MSB)

Fan 2 min

tach

count

Fan 2 min

tach

count

Fan 2 min

tach

count

Fan 2 min

tach

count

Fan 2 mi n

tach count

( LSB)

R 26h

0000

0000

Fan 1 cur r ent

d uty cycl e

MSB — — — — — — LS B

Table 3. Register Map (continued)

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 21 22

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