SBC-C31
SBC-C31 User Manual - Rev. First Edition: 1.0 - Last Edition: 1.0 - Author: A.R. - Reviewed by D.T. - Copyright © 2021 SECO S.p.A.
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CSI_P2_DP0/CSI_P2_DN0: MIPI CSI2 Port differential data pair #0
CSI_P2_DP1/CSI_P2_DN1: MIPI CSI2 Port differential data pair #1
CSI_P2_DP2/CSI_P2_DN2: MIPI CSI2 Port differential data pair #2
CSI_P2_DP3/CSI_P2_DN3: MIPI CSI2 Port differential data pair #3
CSI_P2_CKP/ CSI_P2_CKN: MIPI CSI2 Port differential clock pair
When connecting CSI cameras to CN16 and CN17 connectors, it is strongly recommended to use shielded cable for EMC compatibility.
At the time being there are functionality limitations so that only MIPI-CSI #1 can be used as well.
3.3.9
microSD Card Slot
The RK3399 SoC allows the use of an SDIO interface the implementation of 4-bit SD card.
4), soldered on bottom side of the module,
push-push type. The microSD slot is a push-push type, H=1.68 mm, type JST P/N DM3AT-SF-PEJM5
or equivalent.
SD_CD_B: Card Detect Input, indicating when a SDIO/MMC card is present
SD_CLK: SD Clock Line (output).
SD_CMD: Command/Response bidirectional line, used for card initialization and for command transfers
SD_DATA[0÷3]: SD Card data bus. SD_DATA0 signal is used for all communication modes. SD_DATA[1÷3] signals are required
for 4-bit communication mode.
SD_PWR voltage is derived from +3.3V_ALW power rail
3.3.10
Audio interface
SBC-C31 board integrates a Texas Instrument TLV320 I2S Stereo Audio Codec,
for high quality audio implementation.
In order to reduce the space dedicated to connectors, there is a TRRS Combo
Audio Socket CN12, i.e. a single socket which offer both stereo Line Out and
Mic In functionalities.
Such TRRS Combo Audio socket can be used with any 4-poles 3.5mm diameter audio jack, with
pinout compatible with the most recent Headsets, shown in the table on the left.
microSD Card Slot CN4
Pin
Signal
1
SD_DATA2
2
SD_DATA3
3
SD_CMD
4
SD_PWR
5
SD_CLK
6
GND
7
SD_DATA0
8
SD_DATA1
CardDetect SD_CD_B
TRSS Audio Jack CN12
Pin
Signal
TIP
Headphone Out Left Channel
RING1
Headphone Out Right Channel
RING2
GND
SLEEVE
Mic In
