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REVISION NO.
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16 15
TM-T88III series
Specification
(STANDARD) B
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) Outline
Compatibility mode supports the compatibility with Centronics parallel interface.
2) Specifications
Data transmission: 8-bit Parallel
Synchronization: Externally supplied nStrobe signals
Handshaking: nAck and Busy signals
Signal levels: T TL compatible
Connector: ADS-B36BLFDR176 (Honda) or equivalent (IEEE 1284 Type B)
3) Switching between online and offline
The printer is not equipped with any online/offline switch. The printer is placed into offline status
in either of the followings:
1) W hen the power is turned on or until the printer becom es ready for data transm ission after it
is initialized by the reset signal (nInit) from the interface.
2) Dur ing the self-test.
3) W hen the cover is open.
4) Dur ing paper feeding using the paper feed button.
5) When the printer stops printing due to a paper-end (in cases when empty paper supply is
detected by either the paper roll end detector or the paper roll near-end detector with a
printing halt due to paper shortage enabled by ESC c 4).
6) Dur ing macro executing standby status.
7) W hen a temporary abnormality occurs in the power supply voltage.
8) W hen 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 is proceeded 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
(Nibble). In the Byte Mode, data transmissions are proceeded by making the eight-bits data
lines bidirectional.
The both modes fail to be proceeded concurrently with the Compatibility Mode, thereby causing
half duplex transmission.