ADLINK Express-HL2 - Manual (Page 35)

Express-HL2 Page 35
4.6.2 SW1: PCI Express Configuration Switch
Switch SW1 allows you to configure the PCI Express x16 lanes from the CPU as 1 PCIe x16, 2 PCIe x8, or 1 PCIe x8 + 2 PCIe x4.
Mode Pin 1 Pin 2
1x PCIe x16 (default) Off Off
2x PCIe x8 On Off
1x PCIe x8 + 2x PCIe x4 On On
Reserved Off On
4.6.3 SW4: LVDS Panel Configuration Switch
Switch SW4 allows you to set the LVDS panel mode to 18-bit or 24-bit.
Mode Pin 2
18 bit LVDS panel mode (default) Off
24 bit LVDS panel mode On
4.6.4 SW3: BIOS Select and Mode Configuration Switch
Module has two BIOS chips and BIOS operation can be configured to "PICMG" and "Failsafe" modes using SW3, Pin 2.
Setting the module to PICMG mode will configure the BIOS chips on the module as SPI0 and SPI1. In PICMG mode, a BIOS chip CANNOT
be placed in SPI0 on the carrier.
In dual-BIOS Failsafe mode, both BIOS chips on the module are configured as SPI1. Only one of the two is connected to the SPI bus at any
given time. In case of BIOS failure of the primary SPI1 BIOS, the system will reboot and switch to the secondary SPI1 BIOS on the module.
In Failsafe mode, it is allowed to also have an SPI0 BIOS on the carrier.
In both modes, strapping can select whether to boot from SPI0 or SPI1 (SW3 Pin 1).
Mode Pin 1 Pin 2
Boot from SPI0 (Default) On —
Boot from SPI1 Off —
Set BIOS to PICMG mode — On
Set BIOS to Failsafe BIOS mode (Default) — Off