Embedded Solutions
Page 6
DIP SWITCH Settings
Please note that the switch numbering and ’CLOSED’ and ‘0PEN’ definitions are
per the silk-screen. Closed corresponds to ‘0’ and open to ‘1’.
SW1 DIP SWITCH Settings
DIPSWITCH #1 [SW1 table on silk-screen]
Switch #1
selects the secondary side VIO [
SVIO
]. When the switch = ‘open’
3.3V is selected for the secondary side. When ‘closed’ is selected 5V is the VIO
definition. The VIO plane is a reference for the IO level. The specification does
not prohibit larger current consumption from these pins. The cPCIBPMC6U
design utilizes a MOSFET to control the 5V or 3.3V rails onto the VIO plane.
Max consumption on the VIO rail is 3A.
The factory setting is ‘Open’.
Switch #2
SM66EN signal is also routed to the PMC connector pin M66EN. If
the PMC uses the M66EN as an input the dipswitch can be used to control the
frequency. If the PMC uses the M66EN pin as a control, the Switch may have no
effect. For example, if the switch is in the ‘open’ position and the PMC is
selecting M66EN = ‘0’ the PMC will “win” and the signal will be at the 33 MHz
setting. Both the dipswitch and the PMC M66EN have to be enabled for 66 MHz.
.
Switch #3
Config66 is controlled with this switch. Closed selects 33 MHz and
open selects 66 MHz capable.
Switch #4
Spare
Switch #5
Spare
Switch #6
Spare
Switch #7
selects
PMC Monarch Mode
. For prPMCs using the Monarch Mode
pin, closing the switch will cause the Monarch Pin [64] at the PMC to be tied
through a 1KΩ resistor to ground. With the switch open the Monarch pin is tied
to 3.3V through 4.7KΩ.
The factory setting is ‘Closed’.
Switch #8
is spare
