beautypg.com

10 sdhc, 11 spi interface, 10 sdhc 4.11 spi interface – Artesyn COMX-P40x0 ENP2 Installation and Use (August 2014) User Manual

Page 70: Table 4-6, Gpio, Table 4-7, Sd or micro sd card on the carrier, Functional description

background image

Functional Description

COMX-P40x0 ENP2 Installation and Use (6806800R95B)

70

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