1.2 INTERFACE OVERVIEW
The printer provides an 8-bit Bi-directional parallel interface and serial interface as standard. Moreover, it is
possible to interface to various computers using the optional type-B interface board. This section describes
the specifications of the standard interfaces.
1.2.1 Parallel Interface Specifications
1.2.1.1 Forward Channel
Transmission mode: 8-bit parallel, IEEE-1284 compatible mode
Synchronization: By STROBE pulse
Handshaking: By BUSY and ACKNLG signal
Signal level: TTL-compatible level, IEEE-1284 level 1 device
Adaptable connector: 57-30360 (Amphenol) or equivalent
Data transmission timing: See Figure 1-1.
Note: Transition time (rise time and fall time) of every input signal must be less than 200 ns and
every output signal must be less than 120 ns.
The BUSY signal is at a HIGH level before either -ERROR signal is at a LOW level or the PE signal is at a
HIGH level until all these signals return to their inactive state. The BUSY signal is at a HIGH level in the
following cases:
- During data reception (see the figure above)
- When the input buffer is full
- When the INIT input signal is active
- During initialization
- When the ERROR signal is active
- In the self-test mode
- In the SelecType
- When the parallel interface is not selected.
The ERROR signal is at a LOW level when the printer is in one of the following conditions:
- Printer hardware error (fatal error)
- A paper-out error
- Release lever operation error
PE signal is at a HIGH level during paper out error.
DATA (n)
DATA
-STORBE
BUSY
-ACKNLG
500 ns (min.)
500 ns (min.) 500 ns (min.) 0 (min.)
0 (min.)
500 ns ~10 µs
0 (min.) 500 ns (max.)
DATA (n+1)
Figure 1-1. Data Transmission Timing
Product Description DLQ-3000 (MINERVA+)
1-2 Rev.A
