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C2K User’s Guide
2-2
Installation
2.3 Power Requirements
The C2K re5.0V and +3.3V from the CompactPCI backplane and Hot Swap functions
r12V. Installed PMC modules may require ±12V.
2.4 Configurations Jumpers
The C2K provides the following configuration header/jumpers:
2.4.1 FLASH_WP# (P6)
P6 is a 2-pin Flash Write-Protect header/jumper that enables write-protection for the flash mem-
ory.
2.4.2 EM_BOOTSEL# (P7)
P7 is a 2-pin Emergency Boot Select header/jumper that determines which boot code the C2K will
execute after reset. Boot code provided by GEIP is stored in the upper 8MB of flash memory.
2.4.3 PCI VIO Select (P9, P12)
P9 and P12 are 3-pin header/jumpers that set the VIO for PCI Busses (PMC sites) at +3.3V or
+5V. P12 controls the VIO for PCI Bus 0 (PMC0) and P9 controls VIO for PCI Bus 1 (PMC1).
If a jumper is installed on P6, the FLASH_WP# signal is asserted preventing writes to the
flash ROM.
If a jumper is not installed on P6, the FLASH_WP# signal is de-asserted allowing writes the
flash ROM.
If a jumper is installed on the EM_BOOTSEL header (P7), the GEIP firmware will boot
from the GEIP provided emergency boot code stored in the Emergency Boot area of flash.
If a jumper is not installed on the EM_BOOTSEL header (P7), the firmware will jump to
user boot code area and begin executing custom boot code (
see “Boot Code Selection” on
page 4-3
).
If a jumper is installed on pins 1 and 2, the VIO is set to +3.3V.
If a jumper is installed on pins 2 and 3, the VIO is set to +5V
1 2
3
1. +3.3V
2. PMC VIO
3. +5V
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