Installation
2-9
USB Connectors
The VIA P4XB-RA and P4XB-SA mainboards provide 2 USB ports (plus 2 pin-
headersfor up to 4 additional USB connections; see 2-18). USB-compatible
devices can be plugged directly into these ports.
PIN
SIGNAL
DESCRIPTION
1
VCC
+5V
2
-Data 0
Negative Data Channel 0
3
+Data0
Positive Data Channel 0
4
GND
Ground
5
VCC
+5V
6
-Data 1
Negative Data Channel 1
7
+Data 1
Positive Data Channel 1
8
GND
Ground
Pin Definition
USB Ports
1 2 3 4
5 6 7 8
Parallel Port Connector: LPT1
The mainboard provides a 25-pin female connector for LPT (parallel port). A
parallel port is a standard printer port that supports Enhanced Parallel Port
(EPP) and Extended Capabilities Parallel Port (ECP) modes.
13
1
14
25
PIN
SIGNAL DESCRIPTION
1
STROBE
Strobe
2
DATA0
Data0
3
DATA1
Data1
4
DATA2
Data2
5
DATA3
Data3
6
DATA4
Data4
7
DATA5
Data5
8
DATA6
Data6
9
DATA7
Data7
10
ACK#
Acknowledge
11
BUSY
Busy
12
PE
Paper End
13
SELECT
Select
14
AUTO FEED#
Automatic Feed
15
ERR#
Error
16
INIT#
Initialize Printer
17
SLIN#
Select In
18
GND
Ground
19
GND
Ground
20
GND
Ground
21
GND
Ground
22
GND
Ground
23
GND
Ground
24
GND
Ground
25
GND
Ground
Pin Definition