Asus P7H55-M - Page 40

1-27 Chapter 1: Product introduction
2. LPT connector (26-1 pin LPT)
The LPT (Line Printing Terminal) connector supports devices such as a printer. LPT is
standardized as IEEE 1284, which is the parallel port interface on IBM PC-compatible
computers.
P
7
H
5
5
-
M
/
US
B
3
P7H55-M/USB3 Parallel port connector
LPT
PIN 1
STB#
PD0 PD1 PD2 PD3 PD4 PD5 PD6 PD7
ACK#
BUSY
PE
SLCT
AFD ERR# INIT# SLIN# GND GND GND GND GND GND GND GND
• For a fully congured system, we recommend that you use a power supply unit (PSU)
that complies with ATX 12 V Specication 2.0 (or later version) and provides a minimum
power of 400 W.
• DO NOT forget to connect the 4-pin / 8-pin ATX +12V power plug. Otherwise, the system
will not boot up.
• We recommend that you use a PSU with higher power output when conguring a
system with more power-consuming devices. The system may become unstable or may
not boot up if the power is inadequate.
• If you are uncertain about the minimum power supply requirement for your system,
refer to the Recommended Power Supply Wattage Calculator at http://support.asus.
com/PowerSupplyCalculator/PSCalculator.aspx?SLanguage=en-us for details.
3. ATX power connectors (24-pin EATXPWR, 8-pin ATX12V)
These connectors are for ATX power supply plugs. The power supply plugs are
designed to t these connectors in only one orientation. Find the proper orientation and
push down rmly until the connectors completely t.
P
7
H
5
5
-
M
/
US
B
3
P7H55-M/USB3 ATX power connectors
EATXPWR
PIN 1
GND
+5 Volts
+5 Volts
+5 Volts
-5 Volts
GND
GND
GND
PSON#
GND
-12 Volts
+3 Volts
+3 Volts
+12 Volts
+12 Volts
+5V Standby
Power OK
GND
+5 Volts
GND
+5 Volts
GND
+3 Volts
+3 Volts
EATX12V
PIN 1
+12V DC +12V DC +12V DC +12V DC
GND GND GND GND