User`s manual

FR550
3-16
Pin Signal Name
1 +3V
2 No connect
3 Reserve
4 Ground
3.5.14 PS/2 Keyboard (J2) and Mouse Connector (J3)
The FR550 mainboard offers 1 PS/2 Keyboard and 1 PS/2 Mouse port as below.
PS/2 Mouse
PS/2 Keyboard
Pin Signal Name
1 DATA
2 No connect
3 Ground
4 +5V (Fused)
5 Clock
6 No connect
3.5.15 Parallel Port Connector (26-pin Block) (J1)
The motherboard includes a bi-directional parallel port (EPP/ECP compatible). The parallel
port is capable of being disabled or remapped to either the secondary LPT address or the
primary LPT address through BIOS if other parallel ports are installed. The parallel port
contains 12mA source output drivers on the drive interface and incorporates Chip Protect
circuitry for protection against damage due to printer’s power being on.
Printer/Parallel Port
Pin Signal Name Pin Signal Name
1 STROBE# 14 AUTOFD#
2 DATA BIT 0 15 FAULT#
3 DATA BIT 1 16 PINIT#
4 DATA BIT 2 17 SLCT IN#
5 DATA BIT 3 18 Ground
6 DATA BIT 4 19 Ground
7 DATA BIT 5 20 Ground
8 DATA BIT 6 21 Ground
9 DATA BIT 7 22 Ground
10 ACK# 23 Ground
11 BUSY 24 Ground
12 PEERROR 25 Ground
13 SLCTt
3.5.16 Serial Port (J4/J5)
The FR550 has two serial ports. The electrical characteristics are compliant with the EIA-232-
D Serial Communications Specifications. The serial ports may be remapped above other
installable serial ports or disabled through the BIOS.