5
EB164 Requirements, Power, and
Parameters
This chapter describes the EB164 environmental requirements, power, and
physical board parameters.
5.1 Power Requirements
The EB164 derives its main dc power from a user-supplied power supply. The
board has a total power dissipation of 116 W, excluding any plug-in PCI and
ISA devices. Table 5–1 lists the power requirement for each dc supply voltage.
The power supply must supply a dcok signal to the system reset logic.
Table 5–1 Power Supply dc Current Requirements
Voltage
Current
1
+3.3 V dc
16.0 A
+5 V dc
10.0 A
–5 V dc
0 A
+12 V dc
1.0 A
–12 V dc
100.0 mA
1
Values indicated are for a fully populated EB164 system module excluding plug-in PCI and ISA
devices, with a CPU clock speed of 266 MHz.
Caution: Fan Sensor Required
The 21164 cooling fan must have a built-in sensor that will drive a
signal if the airflow stops. The sensor is connected to EB164 board
connector J30. When the signal is generated, it resets the system.
EB164 Requirements, Power, and Parameters 5–1
