Doc. No: Unex-QSG-21-001
20/27
A printed version of this document is an uncontrolled copy
© 2021 Unex Technology Corporation – Company Confidential
8.1.2.5.
DIP Switch Settings
Figure 16: DIP switches. SW3 (Left), SW2 (Right)
Table 14: SW2 and SW3 functions
Position
Name
Function
Description
SW2.1
5V_SW
mPCIe 5V
ON: mPCIe 5V ON, UART2 to mPCIe
OFF: mPCIe 5V OFF, UART2 to GNSS module
SW2.2
TAMPER#_SW
mPCIe TAMPER#
ON: mPCIe P51 close to OBU-301(v2)/OBU-351 tamper
OFF: mPCIe P51 open from OBU-301(v2)/OBU-351
tamper
SW3.1
BOOT_SW
Boot strapping
ON: boot from NAND (Normal boot)
OFF: boot from USB0 (FW upgrade)
SW3.2
TRIGGER_SW
Trigger mode
ON: Trigger when tamper SW close to GND (1K PU)
OFF: Trigger when tamper SW open from 3V3 (30K PD)
8.2.
I/O Conversion Board (EVK-351 Series Only)
An I/O conversion board (EX-47) and an adapter cable (EX-46) is included in EVK-351
series package. The I/O conversion board (EX-47) is an accessory which converts the JST
20 pin headers into industrial standard connectors which are more familiar to users. The
adapter cable (EX-46) should be connected between EVK-351 and EX-47.
The EX-46 and EX-47 are not included in OBU-301(v2)/OBU-351 package and should
be ordered separately if needed.
SW3
SW2
