Spi Flash Header; Table 39 X20 - Spi Flash Header; Table 40 Sw M13 - Bios Boot Device Selection - Congatec COM Express conga-MEVAL Manual

5.13

SPI Flash Header

The conga-MEVAL provides header X20 for connecting SPI flash by default. An optional 8-pin SOIC socket can be provided by request (BOM
option). Use DIP M13 to select the flash device to boot from.
Table 39 X20 - SPI Flash Header
Pin Signal
1 SPI_CS#
3 SPI_MISO
5 SPI_WP
7 GND
Table 40 SW M13 - BIOS Boot Device Selection
SW1 SW2
OFF OFF
OFF ON
ON OFF
ON ON
Note
Use SPI flash that supports the module's SPI power.
Connector Type
M13: DIP Switch
X20: 1.27 mm, 2 x 4-pin female header (board to board connection)
Copyright © 2022 congatec GmbH
Description Pin Signal
SPI Chip select 2
SPI data in from carrier board 4
flash to module
SPI write protect 6
Ground 8
Configuration
Boot from on-module firmware (default)
Boot from carrier board SPI Flash (X20)
Not supported
Not supported
Description
SPI_PWR SPI power source from COM Express module
SPI_HOLD# Stops serial communication temporary without
device reset
SPI_CLK SPI clock from module
SPI_MOSI SPI data out from module to carrier board flash
CET0m10
X20
1 8
4 5
M13
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