FIC a440 Manual Do Serviço
Pin Assignments
B-2
FIC A440 Series Service Manual
B.
B.
B.
B.2
22
2 Serial Port Connector
Serial Port Connector
Serial Port Connector
Serial Port Connector
The pin assignment of the serial (COM1) port connector is as follows:
No
PIN ASSIGMENT (by: sort)
DESCRIPTION
1
DCDA#_T:I
Active low Data Carrier Detect inputs
For the serial port.
For the serial port.
2
SINA_T:I
Receiver serial data input for port 1.
3
SOUTA_12:O
Transmit serial data output for port 1.
4
DTRA#_6:O
Active low Data Terminal Ready
Outputs for the serial port.
Outputs for the serial port.
5 GND
Ground
6
DSRA#_T:I
Active low Data Set Ready inputs
For the serial port.
For the serial port.
7
RTSA#_6:O
Active low Request to Send Outputs
For the serial port.
For the serial port.
8
CTSA#_T:I
Active low Clear to Send inputs
For the serial port.
For the serial port.
9
RI#_T:I
Active low Ring Indicator inputs
For the serial port.
For the serial port.
B.
B.
B.
B.3
33
3 Parallel Port Connector
Parallel Port Connector
Parallel Port Connector
Parallel Port Connector
The pin assignment of the parallel/printer (LPT1) port connector is as follows:
No
PIN ASSIGMENT(by: sort)
DESCRIPTION
1
STB#/DS0#_D14/_P14/_D12:O
An active low pulse on this output is used to strobe the
printer data into the printer. The STROBE output is the
complement of bit 0 of the printer control register. Refer
to parallel port description for use
of this pin in ECP and EPP mode. Active low outputs
select driver 0.
printer data into the printer. The STROBE output is the
complement of bit 0 of the printer control register. Refer
to parallel port description for use
of this pin in ECP and EPP mode. Active low outputs
select driver 0.
2
PD0/INDEX3#_P14/_S:IO/I
Port data 0.
This active low Schmidt trigger input senses from the
disk drive that the head is positioned over the beginning
of a track as marked by an index hole.
This active low Schmidt trigger input senses from the
disk drive that the head is positioned over the beginning
of a track as marked by an index hole.
3
PD1/TRK0#_P14/_S:IO/I
Port data 1
This active low Schmidt trigger input senses from the
disk drive that the head is positioned over the outermost
track.
This active low Schmidt trigger input senses from the
disk drive that the head is positioned over the outermost
track.
4
PD2/WRTPRT#_P14/_S:IO/I
Port data 2
This active low Schmidt trigger input senses from the
disk drive that a disk is write protected. Any write
command is ignored.
This active low Schmidt trigger input senses from the
disk drive that a disk is write protected. Any write
command is ignored.
5
PD3/RDATA#_P14/_S:IO/I
Port data 3
Raw serial bit stream from the disk drive, low active.
Each falling edge represents a flux transition of the
encoded data.
Raw serial bit stream from the disk drive, low active.
Each falling edge represents a flux transition of the
encoded data.
6
PD4/DSKCHG_P14/_S:IO/I
Port data 4
This input senses that the driver door is open or that the
diskette has possibly been changed since the last drive
selection.
This input senses that the driver door is open or that the
diskette has possibly been changed since the last drive
selection.
7
PD5_P14:IO
Port data 5