Specifications

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TM-H5000II
IIII
II series
Specification
(STANDARD)
2.1.2 IEEE 1284 Bidirectional Parallel Interface (Parallel Interface Specifications)
Copyright© 1994 by the Institute of Electrical and Electronic Engineers, Inc.
2.1.2.1 Compatibility Mode
(Data Transmission from Host to Printer: Centronics Compatible)
(1) Specifications
Data transmission: 8-bit Parallel
Synchronization: Externally supplied nStrobe signals
Handshaking: nAck and Busy signals
Signal levels: TTL compatible
Connector: ADS-B36BLFDR176 (HONDA) or equivalent (IEEE 1284 Type B)
NOTE: “n” before a signal name indicates an active LOW signal.
Reverse communication (Printer Host): Nibble or Byte Mode
(2) Switching between online and offline
The printer is not equipped with any online/offline switch. The printer is placed into offline status
in any of the following conditions:
1) When the power is turned on or until the printer becomes ready for data transmission after it
is initialized by the reset signal (nInit) from the interface.
2) During the self-test.
3) When the cover is open.
4) During paper feeding using the FORWARD/REVERSE button.
5) When the printer stops printing due to a paper-end (only when the paper roll is not present).
6) During macro executing standby status.
7) When a temporary abnormality occurs in the power supply voltage.
8) When an error has occurred.
2.1.2.2 Reverse Mode (Data Transmission from Printer to Host)
The STATUS data transmission from the printer to the host proceeds in the Nibble or Byte mode.
• Description
This mode allows data transmission from the asynchronous printer under the control of the
host.
Data transmissions in the Nibble Mode are made via the existing control lines in units of four
bits (a nibble). In the Byte Mode, data transmissions proceed by making the eight-bits data
lines bidirectional.
Both modes fail to proceed concurrently with the Compatibility Mode, thereby causing half
duplex transmission.