Printronix S828 Programmer's Manual page 369

Programmer Manual
n.a. (nInit)
Compatibility Mode:
Negotiation Phase:
Reverse Data Transfer Set HIGH.
Phase:
nDataAvail (NFault)
Compatibility Mode:
Negotiation Phase:
Reverse Data Transfer Nibble Mode: Set low to indicate that printer is ready to send to host. Then used to
Phase:
Reverse Idle phase:
nDataAvail (NFault)
Compatibility Mode:
Negotiation Phase:
Reverse Data Transfer Nibble Mode: Set low to indicate that printer is ready to send to host. Then used to
Phase:
Reverse Idle phase:
1284 Active (NSelectIn)
Compatibility Mode:
Negotiation Phase:
Reverse Data Transfer Set high to indicate that bus direction is printer to host. Set low to terminate 1284
Phase:
Reverse Idle Phase:
Appendix B‐ Interfaces
Pulsed low in conjunction with 1284 Active low to reset the interface and force to
return to Compatibility Mode idle phase.
Set HIGH.
Set low to indicate that an internal printer error has occurred.
Set high to acknowledge 1284 compatibility. In Nibble or Byte Mode it is then set low
to indicate printer-to-host data is available following host setting HostBusy (nAutoFd)
high.
send data bits 0 then 4.
Byte Mode: Used to indicate that data is available.
Used to indicate that data is available.
Set low to indicate that an internal printer error has occurred.
Set high to acknowledge 1284 compatibility. In Nibble or Byte Mode it is then set low
to indicate printer-to-host data is available following host setting HostBusy (nAutoFd)
high.
send data bits 0 then 4.
Byte Mode: Used to indicate that data is available.
Used to indicate that data is available.
Set low by host to select printer.
Set high in conjunction with Host Busy being set low to request a 1284 mode.
mode and set bus direction host to printer.
Same as Reverse Data Transfer phase.
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PTX‐S828
260071‐001A