Doc. No: Unex-QSG-21-003
13/23
A printed version of this document is an uncontrolled copy
© 2021 Unex Technology Corporation – Company Confidential
Please note that the pinout listed here is seen from the SOM-301(v2)/SOM-351 side.
For designing an I/O cable interface on the system board, the input and output direction
must be reversed.
Table 8: I/O cable pinout
Pin
Name
Type
Level (V)
Description
J1.1
5V
P
5
5V power
Internally tied with mPCIe 5V pins
J1.2
RXD
I
3.3
UART RXD (PU)
Internally tied with mPCIe P17
J1.3
TXD
O
3.3
UART TXD (PU)
Internally tied with mPCIe P19
J1.4
EX_RSTn
I
3.3
CRATON2 reset (PU)
Internally tied with mPCIe P22
J1.5
1PPS
I
3.3
1PPS (PU)
Internally tied with mPCIe P49
J1.6
TAMPER#
I
3.3
Active LOW
Internally tied with mPCIe P51
J1.7
GND
G
-
Ground
The 7-pin cable connector is Molex Pico-Lock system
504051-0701
and the contact is
504052-0098
.
Figure 5: I/O Cable mating component P/N
8.4.
DIP Switch
The onboard DIP switch can help user to direct power and I/O signals from either
