Q7-AL
Connector Pinouts on Module
35
4.6. BIOS Switch Settings
Figure 10: Q7-AL BIOS Switch Location
BIOS Select and Mode Configuration Switch
The module has two BIOS chips, and BIOS operation can be configured to "Normal" and dual-BIOS "Failsafe"
modes using the BIOS Select and Mode Configuration switch (BSW1), Pin 2.
Setting the module to Normal mode will configure the BIOS chips on the module as SPI0 and SPI1. In Normal
mode, a BIOS chip cannot be placed in the SPI0 slot 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 failure of the primary SPI1 BIOS, the system will reboot and
switch to the secondary SPI1 BIOS on the module. In Failsafe mode, the SPI0 BIOS socket on the carrier can be
populated.
In either mode, the BIOS Select and Mode Configuration switch (BSW1), Pin 1 is used to select whether to boot
from SPI0 or SPI1.
Table 5: BIOS Select and Mode Configuration Switch Settings
Mode
Pin 1
Pin 2
Boot from SPI0 (default)
On
—
Boot from SPI1
Off
—
Set BIOS to Normal mode
—
On
Set BIOS to Failsafe BIOS mode (default)
—
Off
Содержание Q7-AL
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