MIC2593 Datasheet, PDF (17/26 Pages) STMicroelectronics – Dual-Slot PCI Hot Plug Controller

MIC2593
Control Register, Slot B (CNTRLB)
8-Bits, Read/Write
Control Register, Slot B (CNTRLB)
D[7]
D[6]
D[5]
D[4]
D[3]
read-only
read-only
read only
read only
read-only
AUXBPG
MAINBPG Reserved
Reserved
Reserved
D[2]
read-only
Reserved
Micrel
D[1]
read/write
MAINB
D[0]
read/write
VAUXB
Bit(s)
Function
AUXBPG AUX output power-good status, Slot B
MAINBPG MAIN output power-good status, Slot B
D[5]
D[4]
D[3]
D[3]
MAINB
VAUXB
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 0000_b = 00_h
Command_Byte Value (R/W): 0000 0011_b = 03_h
The power-up default value is 00_h. Slot is disabled upon power-up, i.e., all supply outputs are off.
April 2004
17
M9999-042204