ADM1029
http://onsemi.com
27
Fan 2 is turned off. Fan 2 is then run at 100% with Fan 1
turned off. Both fans are then spun-up for the Fan Spin-up
time. Note that the Hotplug Latch bit and Missing Latch bit
remains set (Bits 7 and 1). These need to be cleared to 0
before a subsequent Fan Free-Wheel Test can occur.
Otherwise, subsequent fan removals and insertions are
ignored.
Figure 38. Configuring AIN0 and AIN1 Pins
ENABLE PINS FOR AIN
FUNCTION
(REGISTER 0X05)
AIN EVENT MASK
(CONFIGURE REG 0X58 FOR
AIN0, REG 0X59 FOR AIN1)
INT
CONFIGURE AIN PINS
BEHAVIOR
AIN0 (REG 0X50)
AIN1 (REG 0X51)
CONFIGURE AIN EVENT
MASK
AIN0 (REG 0X58)
AIN1 (REG 0X59)
CONFIGURE AIN
HIGH LIMITS
AIN0 (REG 0XA8)
AIN1 (REG 0XA9)
CONFIGURE AIN
LOW LIMITS
AIN0 (REG 0XB0)
AIN1 (REG 0XB1)
MEASURE AIN
VOLTAGES
AIN0 (REG 0XB8)
AIN1 (REG 0XB9)
RUN FAN 1 AT ALARM SPEED IF AIN
OUT-OF-LIMIT EVENT IS DETECTED
RUN FAN 2 AT ALARM SPEED IF AIN
OUT-OF-LIMIT EVENT IS DETECTED
RESERVED  READ BACK ZERO
BIT 0 = 1
BIT 1 = 1
BITS 27
AIN PINS ENABLE (REG 0X05)
BIT 0 = 0
PIN 19 CONFIGURATED AS AIN0
BIT 1 = 0
PIN 20 CONFIGURATED AS AIN1
BITS 27
RESERVED FOR OTHER FUNCITIONS
AIN PINS BEHAVIOR (REG 0X50 CONFIGURES AIN0, REG 0X51 CONFIGURES AIN1)
BIT 0 = 0
CFAULT
 ASSERTED IF AIN VALUE EXCEEDS AIN HIGH LIMIT
BIT 1 = 1
FANS RUN ALARM SPEED IF AIN VALUE EXCEEDS AIN HIGH LIMIT
BIT 2 = 1
INT
 ASSERTED IF AIN VALUE EXCEEDS AIN HIGH LIMIT
BIT 3 = 0
ALARM GENERATED (INT
, CFAULT
, OR ALARM SPEED) WHEN AIN GOES BELOW AIN LOW LIMIT
BIT 3 = 1
ALARM GENERATED (INT
, CFAULT
, OR ALARM SPEED) WHEN AIN GOES ABOVE AIN LOW LIMIT
BIT 4 = 1
CFAULT
 ASSERTED IF AIN VALUE EXCEEDS AIN LOW LIMIT. BIT 3 DECIDES WHETHER CFAULT
IS ASSERTED GOING ABOVE OR BELOW THE LOW LIMIT
BIT 5 = 1
FANS RUN ALARM SPEED IF AIN VALUE CROSSES THE AIN LOW LIMIT. BIT 3 DECIDES WHETHER
ALARM SPEED IS TRIGGERED GOING ABOVE OR BELOW THE LOW LIMIT
BIT 6 = 1
INT
 ASSERTED IF AIN VALUE CROSSES THE AIN LOW LIMIT. BIT 3 DECIDES WHETHER INT
 IS
ASSERTED GOING ABOVE OR BELOW THE LOW LIMIT
BIT 7 = 1
THIS BIT LATCHES AN OUT-OF-LIMIT AIN EVENT. CLEARED BY WRITING A 0
7
6
5
4
3
2
1
0
FANS RUN ALARM SPEED
CFAULT
1 = ALARM ABOVE AIN LOW LIMIT
0 = ALARM BELOW AIN LOW LIMIT
INT
CFAULT
FANS RUN ALARM SPEED
YES
IS AIN
VALUE >
AIN HIGH
LIMIT?
YES
YES
YES
YES
YES
YES
IS AIN
VALUE >
AIN HIGH
LIMIT?
IS AIN
VALUE >
AIN HIGH
LIMIT?
AIN ABOVE OR
BELOW LOW AIN
LIMIT?
HAS AIN
VALUE EXCEEDED
AIN LOW
LIMIT?
HAS AIN
VALUE EXCEEDED
AIN LOW
LIMIT?
HAS AIN
VALUE EXCEEDED
AIN LOW
LIMIT?
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