CURTISS-WRIGHT 1
826448 VERSION 5 MARCH 2015 PROPRIETARY A-57
REAR TRANSITION MODULE (RTM) CONFIGURATION SWITCHES
As seen in Figure A.19 on page A-53, the RTM PWB provides a bank of configuration switches,
numbered SW2 through SW14.
Table A.39: RTM SW2–SW18 Functions
RTM Switch Silkscreen Label ON OFF Default AV8 Jumper
SW2 JTSEL Enable JTAG mode Disable JTAG mode OFF N/A
SW3 JPROC0 Selects JTAG scan chain
when JTAG enabled
No effect when JTSEL is
set to off
OFF N/A
SW4 JPROC1 OFF N/A
SW5 JPROC2 OFF N/A
SW6 JPROC3 OFF N/A
SW7 WD_DIS Disable watchdog Enable watchdog OFF JB9
SW8 ALT_BOOT Boot from PABS flash Boot from main boot flash OFF JB8
SW9 FLASH_WR_DIS Write-protect primary boot
flash
Writing enabled to primary
boot flash
OFF JB7
SW10 NVRAM_WR_DIS Write-protect NVRAM Writing enabled to NVRAM OFF JB6
SW11 PROM_WR_EN Enable PROM writes to
config PROMs (SPD, GigE,
PCIe)
Disable writes to config
PROMs
OFF JB4
SW12 NVMRO Pull NVMRO backplane sig-
nal low (see Table A.4 on
page A-15 for details about
the NVMRO signal). When
in this state, it is possible to
enable writes to main
NAND flash, main boot
flash, NVRAM, and FPGA
PROM, independent of the
setting of the associated
RTM switch. This function-
ality is analogous to the
VPX6-1957 "Curtiss-Wright
Legacy Mode" described in
the VPX6-1957 Hardware
User's Manual (Cur-
tiss-Wright document #
830214).
NVMRO signal is high
(unless driven low by
another board connected to
the same backplane, or the
CHAMP-AV8 JB10 jumper
is ON – see Table 2.3 on
page 2-7 for details).When
in this state, writes to main
NAND flash, main boot
flash, NVRAM, and FPGA
PROM may be disabled, as
determined by the associ-
ated RTM switch. This func-
tionality is analogous to the
VPX6-1957 "Curtiss-Wright
Legacy Mode" described in
the VPX6-1957 Hardware
User's Manual (Cur-
tiss-Wright document #
830214).
OFF N/A
SW13 PMI_JTSEL Reserved for Curtiss-Wright
Use
No effect during normal
operation
OFF N/A
SW14 NAND_WR_DIS Write-protect SATA SSD
device
Writing enabled to SATA
SSD device
OFF JB1
SW16 PABS_WR_EN Writing enabled to PABS
boot flash
Write-protect PABS boot
flash
OFF JB5
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