Microsd Card Slot - Seco CCOMe-C30 User Manual

3.3.4

microSD Card Slot

According to the release 2.0 of COM Express specifications, on the same pins are multiplexed the signals necessary for the implementation of 4-bit SD cards with
four General Purpose Inputs plus four general Purpose Outputs. Effective support of GPI+GPO signals or SDIO interface depends on the module used. Please refer
to the User Manual of the COM Express module used for a detail about the interface support.
Signals description
SD_CD#: Card Detect Input.
SD_CLK: SD Clock Line (output).
SD_CMD: Command/Response bidirectional line.
SD_WP: SD Write Protect Input line
SDIO_DAT[0÷3]: SD Card data bus. SDIO_DAT0 signal is used for all communication modes. SDIO_DAT[1÷3] signals are required for 4-bit communication mode.
JP5 position Interface enabled
Inserted SDIO enabled
Not inserted GPI/O enabled
3.3.5 GPIO Pin Header
GPIO pin header - CN17
Pin Signal
1 GPO0
3 GPO1
5 GPO2
7 GPO3
9 GND
CCOMe-C30
CCOMe-C30 - Rev. First Edition: 1.0 - Last Edition: 1.0 - Author: S.B. - Reviewed by F.B. Copyright © 2019 SECO S.p.A.
29), soldered on bottom side of the module, push-push type.
The selection between SD Card interface and GPI/O interface is made using jumper JP5,
according to the table on the left.
Pin Signal
2 +3.3V_A
4 GPI0
6 GPI1
8 GPI2
10 GPI3
If supported by the COM Express module installed on CCOMe-C30 module, the GPIO
interface, is available on CN17, which is a dual row, 10 pin, P2.54mm standard pin header,
with the pinout shown in the table on the left.
This interface is available only by removing the jumper JP5 (as described in the previous
paragraph)
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