User Manual

Technical Reference
25
3.2 NVMe/SATA Interfaces
The PCH provides three Internal M.2 interface slots with a theoretical maximum transfer rate and
provides the following interfaces:
• M.2 #1 22x80 supports up to 3.5 Gb/s with one PCIe M.2 slot for SSD and AI
accelerator use. The M.2 SSD slot is required to support NVMe drives.
• M.2 #2 22x30 support up to 2.4 Gb/s with one M.2 slot for wireless card expandability.
L10 SKU is equipped with a wireless card pre-installed. However, board SKUs have
an empty slot.
• M.2 #3 30x42 up to 6 Gb/s is designed to have one 30x42 B-keyed M.2 slot which is used
for WWAN, SATA, NVMe (NVMe x2 running as NVMe x1 only) and AI accelerator
expansion module.
NOTE
Bravo Canyon is not equipped with a 2.5” SATA Drive Bay.
3.3 Real-Time Clock Subsystem
A coin-cell battery (CR2032) powers the real-time clock and CMOS memory. When the computer
is not plugged into a wall socket, the battery has an estimated life of three years. When the
computer is plugged in, the standby current from the power supply extends the life of the battery.
The clock is accurate to  13 minutes/year at 25 ºC with 3.3 VSB applied via the power supply 5 V
STBY rail.
NOTE
If the battery and AC power fail, date and time values are reset and the user is notified during the
POST.
When the voltage drops below a certain level, the BIOS Setup program settings stored in CMOS
RAM (for example, the date and time) might not be accurate. Replace the battery with an
equivalent one. Error! Reference source not found. on page Error! Bookmark not defined. shows
the location of the battery.
System can power on from G3/AC power loss state without the Real-Time Clock battery.