FENIX IMVICO
TK14 OPERATION MANUAL
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2.4- CENTRONICS PARALLEL INTERFACE
The TK14 comply the IEE1284 protocol (
NIBBLE MODE
).
Copyright © 1994 by the Institute of Electrical and Electronic Engineers, Inc.
2.4.1- Compatibility mode (Data transmission from host system to the printer: Centronics
compatible)
*Any system sending data to the printer (PC, PLC, custom board, et cetera) is considered to be a host
system.
The compatibility mode supports compatibility with the Centronics parallel interface.
a) Specifications
Data transmission: 8-bit parallel
Synchronization: nSTB signal externally provided
Protocol: nACK (acknowledge) and BUSY signals
Signal levels: TTL compatible
Connector (user side): JST
PHDR-18VS
(housing)
SPHD-001T-P0.5
(contact) or an equivalent model.
b) Switching between online and offline mode
The printer does not provide any switch for online/offline mode. The printer is in offline mode in the
following cases:
1) When powering on or until the printer becomes ready for data transmission after it is initialized by
the reset signal from the interface
2) During the self-test.
3) When the platen is opened.
4) During paper advance using the paper advance button (paper feed).
5) When the printer stops printing due to ‘out of paper’.
6) When a temporal voltage abnormality happens to the power supply.
7) When an error occurs.
c) Timing diagram of data reception
Data n Data n+1
Data
tHold
nStrobe
tSetup tSTB
Busy
Peripheral Busy
TReady tBUSY
nAck
tnBUSY
tReply tACK
tNext
