ADLINK Technology ReadyBoard 620, Справочное руководство

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Chapter 3 Hardware
ReadyBoard 620 Reference Manual 19
Note: The shaded areas denote power or ground. The signals marked with * = Negative true logic.
11 BUSY
MTR1*
Parallel Busy – This is a status output signal from the printer. A High State
indicates the printer is not ready to accept data.
Floppy Motor Control 1 – Select motor on drive 1.
12 PE
WDATA*
Parallel Paper End – This is a status output signal from the printer. A High
State indicates it is out of paper.
Floppy Write Data – Encoded data to the drive for write operations.
13 PSLCT
WGATE*
Printer Select – This is a status output signal from the printer. A High State
indicates it is selected and powered on.
Floppy Write Enable – Drive signal to enable current flow in the write head.
14 AFD*
DRVEN0*
Parallel Auto Feed* – This is a request signal into the printer to automatically
feed one line after each line is printed.
Floppy Drive Density Select Bit 0
15 ERR*
HDSEL*
Parallel Error – This is a error status output signal from the printer. A Low
State indicates an error condition on the printer.
Floppy Head Select – Selects the side for Read/Write operations (0 = side 1,
1 = side 0)
16 PINIT*
DIR*
Printer Initialize* – This signal is used to Initialize printer. Output in standard
mode, I/O in ECP/EPP mode.
Floppy Direction – Direction of head movement (0 = inward motion,
1 = outward motion).
17 SLIN
STEP*
Parallel Select In – This output signal to the printer is used to select the printer.
I/O pin in ECP/EPP mode.
Floppy Step – Low pulse for each track-to-track movement of the head.
18 GND Ground
19 GND Ground
20 GND Ground
21 GND Ground
22 GND Ground
23 GND Ground
24 GND Ground
25 GND Ground
26 NC Not Connected
Table 3-4. Floppy/Parallel Interface Pin/Signal Descriptions (J18) (Continued)