Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsPMICsPMIC - temperature management Internal, External I²C/SMBus QSOP 16

MAX6653/MAX6663/MAX6664

Temperature Monitors and

PWM Fan Controllers

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Addr

(

)

READ/WRITE POR STATE DESCRIPTION

0A R

0001 1110

(30°C)

Local temperature data:

This register contains the 8 MSBs of the local temperature measurement.

0B R

0001 1110

(30°C)

Remote temperature data:

This register contains the 8 MSBs of the local temperature measurement.

0D R/W 0000 0000

Local temperature offset:

Bit 7: Sign bit; when zero, the offset value in bits [3:0] is added to the measured local

temperature reading. When this bit is 1, the offset value in bits [3:0] is subtracted

from the local temperature reading.

Bits [6:4] Unused. This bits normally reads back zeros.

Bits [3:0] Offset value. This is added to or subtracted from the measured local

temperature reading.

0E R/W 0000 0000

Remote temperature offset:

Bit 7: Sign bit: When 0, the offset value in bits [3:0] is added to the measured remote

temperature reading. When this bit is 1, the offset value in bits [3:0] is subtracted

from the remote temperature reading.

Bits [6:4] Unused: These bits normally read back zeros.

Bits [3:0] Offset value: This is added to or subtracted from the measured remote

temperature reading.

10 R/W 1111 1111

Fan tachometer high-limit register:

Contains the limit of the fan-speed measurement. It detects a stalled fan if the

measured fan-speed data (reg_08h; proportional to fan period) is larger than the limit.

14 R/W

0011 1100

(60°C)

Local temp high limit:

Contains the local high-temperature interrupt limit.

15 R/W

0000 0000

(0°C)

Local temp low limit:

Contains the local low-temperature interrupt limit.

16 R/W

0100 0110

(70°C)

Local temp THERM limit:

Contains the local high-temperature limit for the THERM output. Default is +70°C for

the MAX6663/MAX6664; CRIT0 and CRIT1 determine the default value for the

MAX6653 (see Table 1).

18 R/W

0101 0000

(80°C)

Remote temp high limit:

Contains the remote high-temperature interrupt limit.

19 R/W

0000 0000

(0°C)

Remote temp low limit:

Contains the remote low-temperature interrupt limit.

1A R/W

0110 0100

(100°C)

Remote temp THERM limit:

Contains the remote high-temperature limit for the THERM output. Default is +100°C

for the MAX6663/MAX6664; CRIT0 and CRIT1 determine the default value for the

MAX6653 (see Table 1).

1B R/W

0101 1111

(95°C)

Local temp shutdown limit:

Contains the local high-temperature limit for the SDL output. CRIT0 and CRIT1

determine the default value for the MAX6653 (see Table 1).

1C R/W

0111 1101

(125°C)

Remote temp shutdown limit:

Contains the remote high-temperature limit for the SDR output. CRIT0 and CRIT1

determine the default value for the MAX6653 (see Table 1).