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MIC2593_08 Datasheet, PDF (17/26 Pages) Micrel Semiconductor – Dual-Slot PCI Hot Plug Controller
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Micrel, Inc.
Detailed Register Descriptions below:
Control Register, Slot A (CNTRLA)
8-Bits, Read/Write
D[7]
read-only
AUXAPG
D[6]
read-only
MAINAPG
Control Register, Slot A (CNTRLA)
D[5]
D[4]
D[3]
D[2]
read-only
read-only
read-only
read-only
Reserved
Reserved
Reserved
Reserved
D[1]
read/write
MAINA
MIC2593
D[0]
read/write
AUXA
Bit(s)
AUXAPG
Function
AUX output power-good status, Slot A
MAINAPG MAIN output power-good status, Slot A
D[5]
D[4]
D[3]
D[2]
MAINA
AUXA
Reserved
Reserved
Reserved
Reserved
MAIN enable control, Slot A
VAUX enable control, Slot A
Operation
1 = Power-is-Good
(VAUXA Output is above its UVLO threshold)
1 = Power-is-Good
(MAINA Outputs are above their UVLO thresholds)
Always read as zero
Always read as zero
Always read as zero
Always read as zero
0 = Off, 1 = On
0 = Off, 1 = On
Power-Up Default Value:
0000 0000b = 00h
Read Command_Byte Value (R/W): 0000 0010b = 02h
The power-up default value is 00h. Slot is disabled upon power-up, i.e., all supply outputs are off.
Control Register, Slot A (CNTRLB)
8-Bits, Read/Write
Control Register, Slot B (CNTRLB)
D[7]
D[6]
D[5]
D[4]
D[3]
D[2]
read-only
read-only
read-only
read-only
read-only
read-only
AUXBPG
MAINBPG
Reserved
Reserved
Reserved
Reserved
D[1]
read/write
MAINB
D[0]
read/write
AUXB
Bit(s)
AUXBPG
Function
AUX output power-good status, Slot B
MAINBPG MAIN output power-good status, Slot B
D[5]
D[4]
D[3]
D[2]
MAINB
AUXB
Reserved
Reserved
Reserved
Reserved
MAIN enable control, Slot B
VAUX enable control, Slot B
Operation
1 = Power-is-Good
(VAUXB Output is above its UVLO threshold)
1 = Power-is-Good
(MAINB Outputs are above their UVLO thresholds)
Always read as zero
Always read as zero
Always read as zero
Always read as zero
0 = Off, 1 = On
0 = Off, 1 = On
Power-Up Default Value:
0000 0000b = 00h
Command_Byte Value (R/W): 0000 0011b = 03h
The power-up default value is 00h. Slot is disabled upon power-up, i.e., all supply outputs are off.
September 2008
17
M9999-092208
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