C
URTISS
-W
RIGHT
1
826448 V
ERSION
5 M
ARCH
2015
P
ROPRIETARY
A-57
R
EAR
T
RANSITION
M
ODULE
(RTM) C
ONFIGURATION
S
WITCHES
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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