Congatec conga-CEVAL, Руководство пользователя

Страница: 25 / 47

Copyright © 2012 congatec AG CEVA_c_m10 25/47
4.1.4.4
LPC Firmware Hubs
The conga-CEVAL offers the possibility to boot the COM Express™ CPU module with an external BIOS instead of the module’s onboard BIOS.
This can be very useful when a customized BIOS is evaluated.
Onboard the conga-CEVAL is a 32-lead PLCC socket for LPC firmware hub (FWH in socket S1). With the DIP switch M46, you can configure
which firmware hub the COM Express™ CPU module should boot from. When the yellow LED D28 is lit, this indicates the module boots with
the BIOS located on the FWH in socket S1.
The table below shows the different DIP switch settings for M46 necessary to either boot from the carrier board FWH on the conga‑CEVAL or
to boot from the onboard FWH on the COM Express™ CPU module.
DIP Switch M46 Configuration
Switch 1 Switch 2
BIOS Entry / SPI_CS0#
OFF OFF Module FWH or SPI
OFF ON Carrier FWH
ON OFF Carrier SPI CS0#
ON ON Carrier SPI CS1#
4.1.5 Universal Serial Bus (USB)
Pin Signal
1 +5V
2 DATA‑
3 DATA+
4 GND
Note
The USB ports 4 and 5 found on the connector X50 are supplied by suspend power and can be used to test the function "wake-up via USB"
PLCC Socket
S1
D28
2
1
ON
DIP SWITCH
(M46)
USB Port 3
USB Port 2
USB Port 1
USB Port 0
X51
(front view)
USB Port 4
USB Port 5
X50
(front view)
8 7 6 5 4 3 2 1