Artesyn COMX-P40x0 ENP2, Manual

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Functional Description
COMX-P40x0 ENP2 Installation and Use (6806800R95B )
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4.10 SDHC
The COMX-P40x0 ENP2 provides an SD/MMC interface to the COM Express connector to
support expansion card options on the carrier.
This module not only supports SD card but also Micro SD card in which there is no write-protect
signal. COMe connector B57 is used to define whether an SD card or Micro SD card is populated
on the carrier board.
4.11 SPI Interface
The COMX-P40x0 ENP2 provides a SPI bus from the P40x0 CPU with 3 chip-select signals. All
SPI bus signals are routed to COM Express connectors.
Table 4-6 GPIO
PCA955NAME - GPIO NAME COMX PLUG.PIN
IO0 - GPI5 CD.A91
IO1 - GPI6 CD.A95
IO2 - GPI7 CD.A97
IO3 - GPI8 CD.B85
IO4 - GP05 CD.B91
IO5 - GPO6 CD.B95
IO6 - GPO7 CD.B101
IO7 - GPO8 CD.B102
Table 4-7 SD or Micro SD card on the Carrier
COMe pin B57 Card on the carrier
1 SD card
0 (Default) Micro SD card