Specifications

Chapter 4 Hardware Reference
42 Users Guide ReadyBox
Power Interface
The ReadyBox provides an ATX power supply to power the ReadyBoard installed in the enclosure. The
power supply provides the standard ATX power supply voltages, but not all of these voltages are used on
the ReadyBoard products. The ReadyBoard products only require one externally supplied +5 volts DC
+/- 5%. The ReadyBox provides two connectors Power In and Power On for connection to the
ReadyBoard product. The Power In connector uses a 4-pin header with 0.200” (5.08mm) spacing.
ATX Power Supply
Table 4-8 gives the pinouts and signals for Power Supply connector.
Table 4-8. ATX Power Supply Interface Pin/Signal Descriptions
Pin # Signal Description Pin # Signal Description
1 +3.3V +3.3 volts DC +/- 5% 11 +3.3V +3.3 volts DC +/- 5%
2 +3.3V +3.3 volts DC +/- 5% 12 -12V This -12V is are for BUS power
only (optional)
3 GND Ground 13 GND Ground
4 +5.0V +5.0 volts DC +/- 5% 14 PS-ON* Enable signal to ATX power supply
5 GND Ground 15 GND Ground
6 +5.0V +5.0 volts DC +/- 5% 16 GND Ground
7 GND Ground 17 GND Ground
8 PW-OK Power Ok or Good signal
from ATX Power supply
18 -5.0V -5.0 volts DC +/- 5%
9 5VSB +5.0 suspend voltage
(+5V, 100mA Standby)
19 +5.0V +5.0 volts DC +/- 5%
10 +12V
+12V used for Bus power
(optional)
20
+5.0V +5.0 volts DC +/- 5%
Notes: The shaded area denotes power or ground. The +12 and +3.3 voltages on a typical ATX power
supply output connector are used for the PCI and ISA bus.
Table 4-9. ATX Power Interface to Power Adapter Pin Configuration
Pin # Signal To Adapters & Cable Pin
#
Signal To Adapters & Cable
1 +3.3V Not connected 11 +3.3V Not connected
2 +3.3V Not connected 12 -12V Not connected
3 GND Not connected 13 GND Not connected
4 +5.0V To Power-In, pin-1 +5V 14 PS-ON* To Power On, pin-3 PS_ON
5 GND To Power-In, pin-3 GND 15 GND Not connected
6 +5.0V Not connected 16 GND To Power On, pin-2 GND
7 GND To Power-In, pin-2 GND
Fan Ground
17 GND Not connected
8 PW-OK Not connected 18 -5.0V Not connected
9 5VSB To Power-On, pin-1 5VSB 19 +5.0V Not connected
10 +12V To Power-In, pin-4 (not used on all
ReadyBoards) and Fan power
20 +5.0V Not connected
Notes: The shaded area denotes power or ground.