Phoenix MicroATX Express – Installation Guide
CMOS Reset
This option is provided as a convenience for those who need to reset the CMOS registers. It should always be set to
"Normal" for standard operation. If the CMOS needs to be reset, turn off the system, move JP2 to 2-3, turn the
system on, move jumper to 1-2 and press reset.
Table 1-1 CMOS Reset
Reset CMOS
Normal
Clear CMOS
JP2 1-2* 2-3
* Manufacturer's Settings.
ATA-Disk Connector Voltage Selection
The ATA-Disk Connector IDE2 can provide either 5Vcc or 3.3Vcc. The jumper JP1 selects the voltage.
Table 1-2 ATA-Disk Connector Voltage Select
ATA-Disk Voltage
5Vcc
3.3Vcc
JP1 1-2*
2-3
*Manufacturer's Settings.
RS422/RS485 Termination Resistors (optional)
The Jumper J6 allows the insertion/removal of the termination resistors (120
Ω
) in the Receiver and Transmitter lines
of the COM1 when operating in RS-422/485 mode.
Table 1-3 COM1 RS-422/485 Tx & Rx Termination Resistor Selection
Termination resistor
selection
Transmitter
Receiver
J6 1-3
2-4
* Manufacturer's Setting is off.
Step 2
SDRAM, CPU, and Cables Installation
Depending upon how your Phoenix MicroATX Express is configured you may need to install the following:
•
SDRAM (DIMMs)
•
CPU
Phoenix MicroATX Express Memory Configuration
The Phoenix MicroATX Express offers 4 DIMM memory sockets (Locations DIMM1,2,3 and 4 –
Figure 1-2
). They
can be configured with 1.8V SDRAM DDR2 DIMM modules. It is very important that the quality of the DIMMs is
good. Unreliable operation of the system may result if poor quality DIMMs are used. Always purchase your memory
from a reliable source. Please, refer to chapter 3 for memory details.
4
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Summary of Contents for MicroATX Express
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