Themis NanoPAK, Руководство пользователя

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A-13
Themis Computer
A—Connector Pinouts, Signals and Solder Beads
Solder Beads and Jumpers
SB18,
SB19
CPU-SET
These two solder beads are either both installed or both not
installed. They are used to connect thru reserved pins the
3.3V rail of the SBC module to the 3.3V rail of the carrier.
When both solder beads are installed, the 3.3V power on the
SBC carrier is provided by the SBC module rather than the
DC/DC converter on the SBC carrier. When this is the case
the DC/DC converter must be removed.
SB18, SB19 NOT INSTALLED: The 3.3V power on the SBC
carrier is provided by the SBC module rather than the DC/DC
converter on the SBC carrier.
SB18, SB19 INSTALLED: The 3.3V power on the SBC carrier
is provided by the SBC module.
SB18, SB19
NOT INSTALLED
SB20
OPTION-
SET
See SB12
SB21
OPTION-
SET
This solder bead is used to select the Vbat voltage range,
wide (9V to 36V) or fixed (3.3V)
SB21 SET TO 1-2 AND 3-4: WIDE RANGE
SB21 SET TO 2-3: FIXED RANGE
SB21 SET TO 1-
2 AND 3-4 (WIDE
RANGE)
SB26 CPU-SET See SB13
SB29 CPU-SET
Close this solder bead to bring the voltage for the Ethernet
magnetic center tap to the 69-pin connector. Only needed if
the transformer is external to the unit.
SB29
NOT INSTALLED
SB30,
SB31
CPU-SET
This solder bead is used to connect the Chassis Copper Pad
located on the front to the Digital GND. SB30, SB31
NOT INSTALLED
SB32 CPU-SET
This wide solder bead is used to connect the main 5V rail of
the SBC carrier to the 5V standby input of the COM Express®
220-pin connector.
SB32 NOT INSTALLED: No 5V stby voltage provided to the
SBC module.
SB32 INSTALLED: The main 5V rail on the SBC carrier is the
5V stby voltage needed by the SBC module.
SB32
NOT INSTALLED
SB34 CPU-SET
This solder bead is used to select the serial controller com-
municating on COM Port B.
SB34 SET TO 1-2: TXDB and RXDB on the front IO connec-
tor is directed to the native COM B port of the SuperIO.
SB34 SET TO 2-3: TXDB and RXDB on the front IO connec-
tor is directed to the local NanoPAK microcontroller.
SB34 SET TO 1-
2 (SuperIO COM
B port)
L44 CPU-SET
This solder bead is named L44 because it takes the place of
an inductor that may be placed in the future for additional in-
put voltage filtering. A separate document will explain the pro-
cedure to implement this filtering. L44 shall be shorted; if not,
NO POWER will be applied to the NanoPAK.
L44
INSTALLED
Table A-5. Solder Bead Settings (Continued)
Name Category Description
Factory
Default
Setting