User Manual

Technical Reference
31
5 Overview of BIOS Features
5.1 Introduction
The system uses an Intel AMI BIOS core that is stored in the Serial Peripheral Interface Flash
Memory (SPI Flash) and can be updated through multiple methods (see Section 5.3). The SPI
Flash contains the BIOS Setup program, POST, the PCI auto-configuration utility, LAN EEPROM
information, and Plug and Play support. The SPI Flash includes a 32 MB flash memory device.
The BIOS Setup program can be used to view and change the identification information and the
BIOS settings for the system. The BIOS Setup program is accessed by pressing <F2> after the
POST memory test beings and before the operating system boots.
5.2 Legacy USB Support
Legacy USB support enables the USB devices to be used even when the operating system’s USB
drivers are not yet available. Legacy USB support is used to access the BIOS setup program and to
install an operating system that supports USB. By default, Legacy USB support is set to Enabled.
To install an operating system that supports USB, verify that Legacy USB support in the BIOS
Setup program is set to Enabled and follow the operating system’s installation instructions.
5.3 BIOS Updates
The BIOS can be updated using one of the following methods:
1. Express BIOS (Windows-based) Update
2. F7 Update
3. Power Button Menu Update
4. iFlash Update
5. UEFI Shell Update
More information and instructions on how to use each of these methods can be found at BIOS
Update and Recovery Instructions. All BIOS update files for Intel NUCs are available on Download
Center.
5.3.1 BIOS Recovery
It is unlikely that anything will interrupt a BIOS update; however, if an interruption occurs the
BIOS could be unstable. Table 16 lists the drives and media types that can be used for BIOS
recovery. The BIOS recovery media does not need to be made bootable. More information about
BIOS recovery methods and instructions can be found at BIOS Update and Recovery Instructions.
Table 16. Acceptable Drives/Media Type for BIOS Recovery
Media Type
(Note)
Can be used for BIOS recovery?
Hard disk drive (connected to USB)
Yes
USB flash drive
Yes
NVME SSD (M.2 interface)
Yes