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.
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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.
29), soldered on bottom side of the module, push-push type.
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.
The selection between SD Card interface and GPI/O interface is made using jumper JP5,
according to the table on the left.
3.3.5
GPIO Pin Header
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)
JP5 position
Interface enabled
Inserted
SDIO enabled
Not inserted
GPI/O enabled
GPIO pin header - CN17
Pin Signal
Pin Signal
1
GPO0
2
+3.3V_A
3
GPO1
4
GPI0
5
GPO2
6
GPI1
7
GPO3
8
GPI2
9
GND
10
GPI3
