SBC-C61
SBC-C61 User Manual - Rev. First Edition: 1.0 - Last Edition: 1.1 - Author: S.B. - Reviewed by N.P. - Copyright © 2021 SECO S.p.A.
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The other two downstream ports are hosted on a 9-pin p2.54mm pin header, h= 6mm,
type NELTRON p/n 2213S-10G-E9 or equivalent, with the pinout shown in the tables on
the left (it is a common pinout for USB headers in PC motherboards).
All USB ports
’
voltages (+5V
USBx
and +5V_USB_OTG) are derived, through a power switch IC, from +5V_A
standby voltages.
USB3+/USB3-: USB Hub Downstream port #3 differential pair.
USB4+/USB4-: USB Hub Downstream port #4 differential pair.
Common mode chokes are placed on all USB differential pairs for EMI compliance.
For ESD protection, on all data and voltage lines are placed clamping diodes for voltage transient suppression.
3.3.10
Audio Connectors
SC61 integrates on board a Class-D amplifier MAX98357A from Maxim, which offers an amplified mono
speaker output on a connector Molex type 53398-0271 as shown in the figure.
Mating connector: MOLEX 51021-0200 receptacle with MOLEX 50079-8000 female crimp terminals.
AMP_SPEAKER_P: Amplified speaker Positive Output
AMP_SPEAKER_N: Amplified speaker Negative Output
The power output available on this connector is (maximum theoretical value):
-
Up to 1.8W on 8Ohm Load, up to 3.2W on 4Ohm load @ 10% Total Harmonic Dist Noise (THDN+N)
-
Up to 1.4W on 8Ohm Load, up to 2.5W on 4Ohm load @ 1% THDN+N.
The i.MX8M Mini processor offers totally up to 8 channels Pulse Density Modulation (PDM) inputs. For this reason, on SBC-C61 board there are two
connectors (CN42 and CN53) that can be used for the connection of two digital Microphones,
These connectors are type MOLEX 53398-0571 or equivalent, with the pinouts shown in the tables in the next page.
Mating connectors: MOLEX 51021-0500 receptacle with MOLEX 50079-8000 female crimp terminals.
Dual USB 2.0 pin Header CN54
Pin Signal
Pin
Signal
1
+5V
USB3
2
+5V
USB4
3
USB3-
4
USB4-
5
USB3+
6
USB4+
7
GND
8
GND
10
---
Mono Speaker Connector CN41
Pin Signal
1
AMP_SPEAKER_P
2
AMP_SPEAKER_N
