ADM1029ARQZ-R7 datasheet(13/50 Pages) ONSEMI

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ADM1029

AUTOMATIC FAN SPEED CONTROL (SEE TABLE X LATER)

BIT 0 = 1

FAN 1 RUNS AT ALARM SPEED FOR OUT-OF-LIMIT TEMPERATURE EVENTS;

OTHERWISE, FAN 1 RUNS AT SPEED DETERMINED BY AUTOMATIC FAN

CONTROL.

BIT 1 = 1

FAN 2 RUNS AT ALARM SPEED FOR OUT-OF-LIMIT TEMPERATURE EVENTS;

OTHERWISE, FAN 2 RUNS AT SPEED DETERMINED BY AUTOMATIC FAN

CONTROL.

BIT 0 = 1

ASSERT CFAULT ON OVER-TEMPERATURE

BIT 1 = 1

RUN FAN(S) ALARM SPEED ON OVER-TEMPERATURE

BIT 2 = 1

ASSERT INT ON OVER-TEMPERATURE

BIT 3 = 0

ALARM BELOW LOW TEMP LIMIT

BIT 3 = 1

ALARM ABOVE LOW TEMP LIMIT

BIT 4 = 1

ASSERT CFAULT WHEN LOW TEMP LIMIT CROSSED

BIT 5 = 1

RUN FAN ALARM SPEED ON UNDER-TEMPERATURE

BIT 6 = 1

ASSERT INT ON UNDER-TEMPERATURE

BIT 7

LATCHES A TEMPERATURE OUT-OF-LIMIT EVENT

MEASURE

TEMPERATURE

LOCAL (REG 0xA0)

REMOTE 1 (REG 0xA1)

REMOTE 2 (REG 0xA2)

CONFIGURE

TEMPERATURE HIGH

LIMITS

LOCAL (REG 0x90)

REMOTE 1 (REG 0x91)

REMOTE 2 (REG 0x92)

DEFAULTS

LOCAL = 80 C

REMOTE 1 = 100 C

REMOTE 2 = 100 C

CONFIGURE

TEMPERATURE LOW

LIMITS

LOCAL (REG 0x98)

REMOTE 1 (REG 0x99)

REMOTE 2 (REG 0x9A)

DEFAULTS

LOCAL = 60 C

REMOTE 1 = 70 C

REMOTE 2 = 70 C

CONFIGURE

TEMPERATURE OFFSETS

LOCAL (REG 0x30)

REMOTE 1 (REG 0x31)

REMOTE 2 (REG 0x32)

DEFAULTS

LOCAL = 0 C

REMOTE 1 = 0 C

REMOTE 2 = 0 C

CONFIGURE

TEMPERATURE COOLING

ACTION

LOCAL (REG 0x48)

REMOTE 1 (REG 0x49)

REMOTE 2 (REG 0x4A)

CONFIGURE

TEMPERATURE FAULT

ACTION

LOCAL (REG 0x40)

REMOTE 1 (REG 0x41)

REMOTE 2 (REG 0x42)

TEMPERATURE

HIGH LIMIT?

CFAULT

YES

TEMPERATURE

HIGH LIMIT?

YES

FANS RUN

ALARM SPEED

TEMPERATURE

HIGH LIMIT?

YES

INT

ALARM ABOVE OR

BELOW LOW TEMP

LIMIT?

0 = ALARM BELOW TEMP LIMIT

1 = ALARM ABOVE TEMP LIMIT

LOW TEMP LIMIT

CROSSED?

CFAULT

YES

LOW TEMP LIMIT

CROSSED?

YES

FANS RUN ALARM SPEED

LOW TEMP LIMIT

CROSSED?

YES

INT

Figure 7. Temperature Sensing Flowchart

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