Rainbow-electronics MAX6641 Manual do Utilizador descarregar pdf (Página 7)

MAX6641

SMBus-Compatible Temperature Monitor with

Automatic PWM Fan-Speed Controller

_______________________________________________________________________________________ 7

READ/

WRITE

ADDRESS

POR

STATE

FUNCTION/

NAME

D7 D6 D5 D4 D3 D2 D1

R/W

0Ch

0000 0000

Local-diode

fan-start

temperature

MSB

(+128°C)

(+64°C)

(+32°C)

(+16°C) (+8°C) (+4°C) (+2°C)

LSB

(+1°C)

R/W

0Dh

0000 xxxx

Fan

configuration

H yster esi s:

0 = 5°C ,

1 = 10°C

Temp

step: 0 =

1°C, 1 =

2°C

Fan control:

1 = remote

Fan

control:

1 = local

XXXX

R/W

0Eh

101x xxxx

Duty-cycle

rate of change

MSB — LSB XXXXX

R/W

0Fh

0101 xxxx

Duty-cycle

step size

MSB — —

LSB

XXXX

R/W

10h

010x xxxx

PWM

frequency

select

Select A Select B Select C

XXXXX

R FDh

0000 0001

Read device

revision

00 0 00001

R FEh

1000 0111

Read

device ID

10 0 00111

R FFh

0100 1101

Read

manufacturer

01 0 01101

Table 1. Register Functions (continued)

X = Don’t care. See register descriptions for further details.

1 2 3 4 5 6 7 8 9 10 11 12 ... 16 17

General Description 1
Applications 1
Features 1
Ordering Information 1
Pin Configuration 1
ABSOLUTE MAXIMUM RATINGS 2
ELECTRICAL CHARACTERISTICS 2
MAX6641 toc01 3
MAX6641 toc02 3
MAX6641 toc03 3
= 3.3V, T 4
Detailed Description 5
Pin Description 5
Table 1. Register Functions 6
Register Descriptions 9
Register (0Eh) 11
Register (0Fh) 11
PWM Output 12
Applications Information 14
Manufacturers 15
Typical Application Circuit 16
Chip Information 16
Package Information 17

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