— 29 —
POWER
DATA
STB
T1
DATA
DATA
DATA
T2
BUSY
ACK
T3
T1: 2.0us MIN
T2: 500ms MIN
T3: 5us TYP
5.3 Description of Input/Output Signals
(1)
Input signal
• DATA 1 to DATA 8 . . . 8 bit parallel signal (positive logic)
• STB . . . Strobe signal for reading out data (negative logic)
• RESET . . . Signal for resetting the entire unit (negative logic 4 ms or more)
(2)
Output signal
• ACK . . . 8 bit data signal for requesting data. ACK is issued at the end of the
BUSY signal (negative logic)
• BUSY . . . Signal indicating the printer is busy. Input new data when the signal
is in “LOW” condition (positive logic)
• PE . . .Signal that shows form cutting (positive logic)
• FAULT. . . . Signal that shows that trouble like mechanism alarm etc. occurred
(3)
Other
• GND . . . Ground commonly used in the circuit
• FRAME GND . . . Frame ground (case ground)
(4)
Timing chart
Busy signal timing: Clear timing can be selected by the memory switch.
ACK signal timing: The following kinds of timing can be selected by the memory
switch setting.
BUSY
ACK
T4
BUSY
ACK
BUSY
Before
Center
After
ACK
T5
Busy signal timing: Clear timing can be selected by the memory switch.
ACK signal timing: The following kinds of timing can be selected by the memory
switch setting.
T4: 5us TYP
T5: 5us TYP
Summary of Contents for CBM-920II
Page 1: ...DOT MATRIX PRINTER MODEL CBM920II User s Manual PAPER FEED ...
Page 53: ... 50 4 CP437 USA Std Europe 5 Katakana 6 CP858 Multilingual 7 CP860 Portuguese ...
Page 54: ... 51 8 CP863 Canadian French 9 CP865 Nordic 10 CP852 Eastern Europe 11 CP866 Russian ...
Page 55: ... 52 12 CP857 Turkish 13 WPC1252 Windows Latin1 14 CP864 Arabic 15 CP869 Greek ...
Page 57: ... 54 10 EXTERNAL DIMENSIONS ...
Page 58: ...1 01E 0612 Printed in Japan ...
