Adlink cExpress-BL Manual do Utilizador descarregar pdf (Página 21)

cExpress-BL Page 21

3.3.10 USB Root Segmentation

3.3.11 SPI (BIOS only)

Signal Pin # Description I/O PU/PD Comment

SPI_CS# B97 Chip select for Carrier Board SPI BIOS Flash. O 3.3VSB

SPI_MISO A92 Data in to module from carrier board SPI BIOS flash. I 3.3VSB

SPI_MOSI A95 Data out from module to carrier board SPI BIOS flash. O 3.3VSB

SPI_CLK A94 Clock from module to carrier board SPI BIOS flash. O 3.3VSB

SPI_POWER A91 Power supply for Carrier Board SPI – sourced from

Module – nominally 3.3V.

The Module shall provide a minimum of 100mA on

SPI_POWER.

Carriers shall use less than 100mA of SPI_POWER.

SPI_POWER shall only be used to power SPI devices

on the Carrier

O P 3.3VSB

BIOS_DIS0# A34 Selection strap to determine the BIOS boot device. I PU 10K 3.3V Carrier shall pull to

GND or leave no-

connect.

BIOS_DIS1# B88 Selection strap to determine the BIOS boot device. I PU 10K 3.3V Carrier shall pull to

GND or leave no-

connect

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Adlink cExpress-BL Manual do Utilizador Página 21