MIC2593 Datasheet, PDF (16/26 Pages) STMicroelectronics – Dual-Slot PCI Hot Plug Controller

MIC2593
Detailed Register Descriptions
Control Register, Slot A (CNTRLA)
8-Bits, Read/Write
Control Register, Slot A (CNTRLA)
D[7]
D[6]
D[5]
D[4]
D[3]
read-only
read-only
read only
read only
read-only
AUXAPG
MAINAPG Reserved Reserved Reserved
D[2]
read only
Reserved
Micrel
D[1]
read/write
MAINA
D[0]
read/write
VAUXA
Bit(s)
Function
AUXAPG AUX output power-good status, Slot A
MAINAPG MAIN output power-good status, Slot A
D[5]
D[4]
D[3]
D[2]
MAINA
VAUXA
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 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.
M9999-042204
16
April 2004