SMH4042A
Although the primary application for the SMH4042A is as of the CompactPCI implementation but they are now
a voltage controller for CompactPCI or VME boards, it is resident on the motherboard. The same circuits shown
versatile enough to be used as a Hot Plug controller on a for switching the voltages on the card can also be used
host PCI card. The functional blocks are similar to those for controlling the slot voltages.
Power Supply
12V
+12V and -12V
DRVREN#
–12V
MOSFETs
5V
VGATE3
+5V and +3V
MOSFETs
VGATE5
SMH4042A
CBI 3
CBI 5
3.3V
PWR_EN
PCI_RST#
FAULT#
CARD_3V_MON
CARD_5V_MON
LOCAL_PCI_RST#
HEALTHY#
[SGNL_VLD]
PCI Bus
BUFFERED PCI BUS
SLOT CONTROL
2070 Fig22
Figure 22. Diagram for a PCI Hot Plug Slot Implementation
SUMMIT MICROELECTRONICS, Inc.
2070 9.1 5/27/03
25
SUMMIT [ SUMMIT MICROELECTRONICS, INC. ]
