VersaLogic VL-EBX-18, Hardware Reference Manual, Page: 27 / 63

System Features
EBX-18 Hardware Reference Manual
20
CPU
The DMP Electronics Vortex86DX2 System-On-a-Chip (SoC) contains a 32-bit x86 (486DX
enhanced) microprocessor that also integrates the following:

DDR2 memory controller

Embedded 2MB BIOS flash memory

PCIe bus running at 2.5 GHz

ISA bus interface

I2C bus interface

SPI bus interface

Real Time Clock

PS/2 keyboard and mouse interface

Peripheral controllers with DMA and
interrupt timer/counter

10/100 Ethernet MAC Controller

GPU

COM ports (FIFO UART)

USB 2.0 host controller

IDE controller (SD and SATA)

Watchdog timers
System RAM
The EBX-18 is equipped with 512 MB, 1 GB, or 2 GB of 1.8 V DDR2 memory soldered to the
board.
Table 8: Memory Configurations of EBX-18 Board Models
Board Model Installed Memory Size Memory Clock
EBX-18SAK — Standard temperature 512 MB 366 MHz
EBX-18SBK — Standard temperature 1 GB 366 MHz
EBX-18SCK — Standard temperature 2 GB 366 MHz
EBX-18EAK — Extended temperature 512 MB 300 MHz
EBX-18EBK — Extended temperature 1 GB 300 MHz
EBX-18ECK — Extended temperature 2 GB 300 MHz
CMOS RAM
C
LEARING
CMOS RAM
To clear the contents of CMOS RAM and the Real-Time Clock:
1. Power off the EBX-18.
2. Remove the V9 jumper from its default position (connecting pins 1-2) and install it on pins
2-3.
3. Leave the jumper in place for at least four seconds.
4. Move the jumper to back to its default position, connecting pins 1-2.
5. Power on the EBX-18.