Specifications

6.1.2 Description of Input/Output Signals

1) Input/Output Signals

Explanation of input/output signals

[1] Input/Output Signals (Compatibility Mode)

(1) Input signals to the printer

・DATA0 ~ 7: 8 bit parallel signal (positive logic)

・nSTROBE: Strobe signal for reading out 8-bit data (negative logic)

・nRESET: Applies reset by the nRESET signal in Compatibility Mode.

(Can be disabled by the setting:Msw3-3)

Reset signal is invalid for nSelectIn/1284-Active “HIGH”.

nSELECT

nRESET

150 msec min

・nSELECTIN : Signal to set “HIGH” when transferring to the IEEE 1284 mode

(negative logic)

(2) Output signals from the printer

・nACK: 8-bit data request signal (negative logic)

・BUSY: Signal to indicate the printer is in the Busy state.

State to become BUSY

1. Period from Reset (including reset by NV memory write

command, I/F signal, and test print command) or just after

printer power on to printer operation ready state.

2. Under test printing

3. Input buffer full state (Refer to “(4) Buffer full state”.)

4. During Head Up (or Platen Open)

5. Under line feeding with FEED switch

6. Waiting for pressing FEED switch at the execution of macro

7. No paper state

8. Error state

BUSY regardless of memory SW setting under the above 1 to 3

conditions.

Does not become BUSY in other case as specified by setting.