COM Express Interfaces
The optional connector J32 offers the possibility to program the flash device with an external
programmer.
The flash device can be used with the Module when the jumper JP5 is set. JP6 will enable the
LPC firmware hub, which is already mentioned in chapter 9.2 'LPC Firmware Hub' on page 207
below.
2.17.3. Routing Considerations
The SPI signals SPI_MISO, SPI_MOSI, SPI_CS# and SPI_CLK should be routed with a
maximum length of 4.5” and should match to each other within 0.1”.
PICMG
®
COM Express
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Carrier Board Design Guide Rev. 2.0 / December 6, 2013
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