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ISL6112
22
FN6456.1
August 25, 2011
Status Register Slot A (STATUSA) 8-Bits, Read-Only
D[3]     Reserved
Always read as zero
FORCE
_A
ENABLE
Allows or inhibits the operation of the FORCE_ON
A input pin
0 = FORCE_ON
A is enabled
1 = FORCE_ON
A is disabled
MAINA    MAIN enable control, Slot A
0 = OFF, 1 = ON
VAUXA    VAUX enable control, Slot A
0 = OFF, 1 = ON
Power-Up Default Value:
0000 0000
b
 = 00
h
 
Read Command_Byte Value (R/W
):
 0000 0010
b
 = 02
h
The power-up default value is 00
h
. Slot is disabled upon power-up; i.e., all supply outputs are off.
NOTES:
8. The state of the PWRGD
A pin is the logical AND of the values of the AUXAPG and the MAINAPG bits, except when FORCE_ON
A is asserted. If
FORCE_ON
A is asserted (the pin is pulled low), and FORCE
_AENABLE is set to a logic zero, the PWRGD
A pin will be unconditionally forced to its
open-drain (Power Not Good) state.
9. The values of the MAINAPG and AUXAPG register bits are not affected by FORCE_ON
A, but will instead continue to read as high if power is Good,
and as low if the conditions that indicate power is good are not met.
BIT(s)
FUNCTION
OPERATION
TABLE 6. STATUS REGISTER, SLOT A (STATA)
D[7]
D[6]
D[5]
D[4]
D[3]
D[2]
D[1]
D[0]
read-only
read-only
read-only
read/write     read-only     read/write    read-only    read/write
FAULTA
MAINA
VAUXA
VAUXAF
Reserved
12VAF     Reserved
3VAF
BIT(s)
FUNCTION
OPERATION
FAULTA    FAULT Status - Slot A
1 = Fault pin asserted (FAULT
A pin is LOW); 0 = Fault pin
deasserted (FAULT
A pin is HIGH). See Notes 10, 11, and 12.
MAINA    MAIN Enable Status - Slot A
Represents the actual state (on/off) of the two Main Power
outputs for Slot A (+12V and +3.3V). 1 = Main Power ON;
0=Main Power OFF
VAUXA    VAUX Enable Status - Slot A
Represents the actual state (on/off) of the Auxiliary Power
output for Slot A. 1 = AUX Power ON; 0 = AUX Power OFF
VAUXAF    Overcurrent Fault: VAUXA supply
1 = Fault; 0 = No fault
D[3]     Reserved
Always read as zero
12VAF    Overcurrent Fault: +12V supply
1 = Fault; 0 = No fault
D[1]     Reserved
Always read as zero
3VAF     Overcurrent Fault: 3.3V supply
1 = Fault; 0 = No fault
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