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PCI Backplane and Enclosure
ARM DUI 0224F Copyright © 2003-2007 ARM Limited. All rights reserved. D-7
The switches, indicators, and test points for the PCI backplane are listed in Table D-1,
Table D-2 on page D-8, and Table D-3 on page D-8.
Table D-1 LED indicators
LED Signal Description
1 MAN1nMAN2 This LED illuminates to indicate Man2 clock selection
2 MANnAUTO This LED illuminates to indicate Auto clock selection
5 CLK33ACTIVE This LED illuminates to indicate 33MHz bus speed.
6 CLK66ACTIVE This LED illuminates to indicate 66MHz bus speed.
7 CLK133ACTIVE This LED is used for manufacturing tests.
9 PSON Power supply on/off indicator. The LED is illuminated
when the unit is off (standby).
10 3V3 Power supply voltage present
11 5V Power supply voltage present
12 12V Power supply voltage present
13 –12V Power supply voltage present
14 PCI_nPRSNT1A and
PCI_nPRSNT2A
This LED illuminates to indicate PCI card present and
enabled in slot A.
15 PCI_nPRSNT1B and
PCI_nPRSNT2B
This LED illuminates to indicate PCI card present and
enabled in slot B.
16 PCI_nPRSNT1C and
PCI_nPRSNT2C
This LED illuminates to indicate PCI card present and
enabled in slot C. (This is the slot for the PB926EJ-S.)