TQ MB-SMARC-3, Руководство пользователя

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User's Manual l MB-SMARC-3 UM 0100 l © 2022, TQ-Systems GmbH Page 17
3.6.10 M.2 Socket with E-Key
The MB-SMARC-3 provides the socket X46 to support an M.2 add-in card with 22 mm width and 30 mm length. USB and a PCIe
×1 interface signals are routed to this socket. M.2 2230 single and double sided add-in cards with E or A+E-Keying can be
inserted. The maximum transfer rate of this interface mainly depends on the SMARC module used and the connected device.
3.6.11 M.2 Socket with B-Key
The MB-SMARC-3 provides the socket X45 to support SATA based M.2 SSDs or USB based WWAN add-in cards. SATA and USB 2.0
interface signals are routed to this socket. A Micro SIM card socket (X11) for native support of UMTS or LTE add-in cards is also
available. M.2 2280, 2242 or 3042 single and double sided add-in cards with B or B+M-Keying can be inserted. Add-in cards with
42 mm length have to be mounted with an additional distance spacer.
The component height of add-in cards with 80 mm length shall not exceed 1.35 mm. Prevent contact between the add-in card
and the steel spacer for mounting add-in cards with 42 mm length.
The transfer rate of this interface depends mainly on the SMARC module used and the connected device.
3.6.12 M.2 Socket with M-Key
The MB-SMARC-3 provides the socket X49 to support PCIe based M.2 SSDs. with 22 mm width and 80 mm or 42 mm length. PCIe
x2 interface signals are routed to this socket. M.2 2280 or 2242 single and double sided add-in cards with M or B+M-Keying can
be inserted. Add-in cards with 42 mm length have to be mounted with an additional distance spacer.
The component height of add-in cards with 80 mm length shall not exceed 1.35 mm. Prevent contact between the add-in card
and the steel spacer for mounting add-in cards with 42 mm length.
The transfer rate of this interface mainly depends on the SMARC module and the connected device.
3.6.13 PCI Express Socket
The MB-SMARC-3 provides the socket X32 to support PCI Express extension cards. PCIe x1 interface signals are routed to this
socket. The transfer rate of this interface mainly depends on the SMARC module and the connected device.
3.6.14 µSD Card
The MB-SMARC-3 is equipped with the socket X12 to support micro SD cards. The corresponding signals of the SMARC module
are routed to the SD card socket.
3.6.15 Audio
The MB-SMARC-3 provides two audio codecs (I2S and HDA) to support following audio features:
•
Headphone out, X14 green
• Microphone in, X15 pink
•
Line in, X13 blue
There is a multiplexer implemented to switch the Audio Signals from either I2S or HDA codec to the connectors.
When DIP switch S1 is “ON”, the I2S path is active. When DIP switch S1 is “OFF”, the HDA path is active.
3.6.16 CAN
The MB-SMARC-3 provides two isolated CAN interfaces.
Table 12: CAN Connector
Illustration 16: CAN Connector, X34 / X33
The CAN ports can be terminated with 120 Ω. Set switch S5 (between CAN connectors) to “ON” to activate the termination
(contact 1 refers to CAN0 and contact 2 to CAN1).
Pin Signal Remark
1 CAN_H CAN High
2 CAN_L CAN Low
3 GND_CAN Isolated CAN Ground
1