DWP 230  (260-2812)               Pinouts              Faxback Doc. # 4803

PARALLEL INTERFACE

INPUT SIGNAL SYSTEM DIAGRAM

DATA 1─┐
       │
DATA 2 │
       │
DATA 3 │
       ├──────These DATA lines provide 8 input signals for actuating
DATA 4 │      the Printer. The Printer will ignore any invalid code applied.
       │
DATA 5 │
       │
DATA 6 │
       │
DATA 7 │
       │
DATA 8─┘
______
STROBE        A sampling signal for the DATA lines which provide instruct-
              ion signals for actuating the Printer.
__________
INITIALIZE    This signal into this terminal initializes the Printer to the
              power ON state. The minimum pulse width

* Ground not shown

OUTPUT SIGNAL SYSTEM DIAGRAM

BUSY          Busy condition: 1) Data is on the buffer 5) Ribbon fault state
                              2) Initial state         6) Cover open state
                              3) Off-line mode         7) Buffer full
                              4) Error state           8) Paper out state

              Ready condition: Condition other than those listed in 1-8 
              above.

OUT OF PAPER  Indicates that the Printer is out of paper. This signal is
              effective when the Bidirectional Tractor (26-2813) is mounted on
              the Printer.
____
BUSY          The logical inverse of BUSY.
___
ACK           Indicates that the Printer has accepted data from the CPU.
_____
FAULT         Indicates that the Printer is in an error state, ribbon fault
              state, cover open state, paper out state, or off-line state.


INTERFACE SIGNAL PIN ASSIGNMENTS

        TYPE: 36-pin receptacle
       MODEL: C-173011-2 or equivalent
MANUFACTURER: AMP (Japan) Ltd. or equivalent

PIN           SIGNAL NAME         PIN           SIGNAL NAME
 1            STROBE*             19            GND
 2            DATA 1              20            GND
 3            DATA 2              21            GND
 4            DATA 3              22            GND
 5            DATA 4              23            GND
 6            DATA 5              24            GND
 7            DATA 6              25            GND
 8            DATA 7              26            GND
 9            DATA 8              27            GND
10            ACK*                28            GND
11            BUSY                29            GND
12            OUT OF PAPER        30            GND
13            BUSY*               31            NC
14            GND                 32            FAULT*
15            NC                  33            INIT*
16            GND                 34            NC
17            GND                 35            NC
18            +5VDC               36            NC

NOTE: NC pins are actually pulled up to 5 VDC through a 4.7K resistor.

Pin 18 provides 5 VDC to the Tandy computer (less than 80 mA of current).

(dtc-07/27/93)