Tally T5023+ Programming Manual page 390

Description of the physical interface
Description of the signals
HostClk/nStrobe
Compatibility Mode:
ECP Mode:
Data 1 ... Data 8
Compatibility Mode:
ECP Mode:
PeriphClk/nAck
Compatibility Mode:
ECP Mode:
Epson ANSI:
380
(Host driven)
Set active 'low' to transfer data into
latch. Data is valid while nStrobe is low.
Used in a closed-loop handshake with
PeriphAck to transfer data or address
information from the host to the printer.
Forward channel data.
Host to the printer or printer to host address or
data.
(Printer driven)
Pulsed 'low' by the printer to acknowledge
transfer of a data byte from the host.
Used in a closed-loop handshake with HostAck
to transfer data from the printer to the host.
The signal nAck is used to acknowledge the
data byte from the host. Additional nAck is set to
zero for a short time if the the online status is
restored.
T5023/5023+ - Programming Guide
Appendix
printer
´s input