
EPM-31 Hardware Reference Manual
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Board Features
CPU
The EPM-31 uses one of three Intel 4th Generation Atom (formerly “Bay Trail”) System-on-
Chip (SoC) processors:
E3845 (quad core)
E3826 (dual core)
E3815 (single core)
Each core contains a 512 KB L2 cache. These processors support Intel 64-bit instructions, AES
Instructions, Execute Disable Bit, and Virtualization Technology.
See the
Intel Atom Processor E3800 Product Family Datasheet
the CPU.
Note:
If the above link to the datasheet becomes inactive, search the internet for “Intel Bay
Trail” or “E3800” and follow the results to the Intel site and datasheet.
System RAM
The EPM-31 accepts one 204-pin SO-DIMM memory module (J9 connector on the bottom side
of the board) with the following characteristics:
Size
Up to 8 GB, 1066 MHz or 1333 MHz, CPU dependent
Voltage
1.35 V
Type
DDR3L (VersaLogic VL-MM9 Series modules)
I/O Interfaces
The EPM-31 board’s I/O interfaces and their associated connectors are described in later
chapters as follows:
Mass Storage Interfaces (SATA and microSD), beginning on page 31
Multi-purpose I/O (USB, PCIe MiniCard / mSATA, User I/O), beginning on page 33
Serial Ports, beginning on page 43
Video Interfaces (VGA, Mini DisplayPort), beginning on page 46
Network Interfaces (Ethernet), beginning on page 50
Expansion Interfaces (SPX, PC/104), beginning on page 53
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