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PCI Backplane and Enclosure
D-8 Copyright © 2003-2007 ARM Limited. All rights reserved. ARM DUI 0224F
Table D-2 Configuration switches
Switch Signal Description
SW1-1 MAN1nMAN2 Determines the clock rate when SW1[1] is in the
Manual position. See Setting the backplane
configuration switches on page D-4.
SW1-2 MANnAUTO Selects between manual (ON) or automatic (OFF) clock
selection
SW2-1 nINCPLD Omits (ON) or includes (OFF) the PLD in the scan
chain.
SW2-2 TESTnEN Omits (ON) or includes (OFF) the PCI sockets in the
scan chain.
Table D-3 Power and reset switches
Switch Signal Description
SW3 PSON Power on/off pushbutton. Pressing the switch
toggles the power between on and standby. SW3
signals are also connected to J6 and this enables the
use of an external front-panel switch.
SW4 SYSTEM_nRESET System reset pushbutton. Pressing the switch
generates a reset to the PCI arbiter on the
backplane and all of the PCI cards. SW4 signals are
also connected to J7 and this enables the use of an
external front-panel switch.
Table D-4 Test points
Test point Signal Description
TP1 GND Ground
TP2 GND Ground
TP3 TCLK JTAG clock
TP4 PCI CLK PCI clock