Ampro Corporation 420 User Manual
Page 38
Chapter 3
Hardware
32
Reference Manual
CoreModule 420
Pin #
Signal
Description
8
SLIN
STEP
Select In – This output signal is used to select the printer. I/O pin in ECP/EPP
mode.
Step – Low step pulse for each track-to-track movement of the head.
9
PD3
RDATA
Parallel Port Data 3 – Refer to pin-3, PDO for more information.
Read Data – Raw serial bit stream from the drive for read operations.
10
GND
Ground
11
PD4
DskChg
Parallel Port Data 4 – Refer to pin-3, PDO for more information.
Disk Change – Senses the drive door is open or the diskette has been changed
since the last drive selection.
12
GND
Ground
13
PD5
Parallel Port Data 5 – Refer to pin-3, PDO for more information.
14
GND
Ground
15
PD6
MTR0*
Parallel Port Data 6 – Refer to pin-3, PDO for more information..
Motor Control 0 – Selects or enables the motor on floppy drive 0.
16
GND
Ground
17
PD7
Parallel Port Data 7 – Refer to pin-3, PDO for more information.
18
GND
Ground
19
Ack*
DS1
Acknowledge* – This is a status output signal from the printer. A Low State
indicates it has received the data and is ready to accept new data.
Drive Select 1 – Selects floppy drive 1.
20
GND
Ground
21
Busy*
MTR1
Busy* – This is a Status output signal from the printer. A High State indicates
the printer is not ready to accept data.
Motor Control 1 – Selects or enables the motor on floppy drive 1.
22
GND
Ground
23
PE
WDATA
Paper End – This is a status output signal from the printer. A High State
indicates it is out of paper.
Write Data – Encoded data to the drive for write operations.
24
GND
Ground
25
Slct
WGATE
Select – This is a status output signal from the printer. A High State indicates
it is selected and powered on.
Write Gate – Signal to the drive to enable current flow in the write head.
26
Key/NC
Key Pin/Not Connected
Notes: The shaded area denotes power or ground. The signals marked with * indicate active low.