AY-5-2376 Swtpc, AY-5-2376 Datasheet

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AY-5-2376

Manufacturer Part Number
AY-5-2376
Description
Manufacturer
Swtpc
Datasheet
www.DataSheet4U.com
KEYBOARD
and
ENCODER
219 W. Rhapsody, San Antonio, Texas 78216
1

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AY-5-2376 Summary of contents

Page 1

KEYBOARD and ENCODER 219 W. Rhapsody, San Antonio, Texas 78216 1 ...

Page 2

... Install the resistors and capacitors on the circuit board using the component layout on the board and the parts list. Bend the leads over on the back side of the board and trim so that 1/16" to 1/8" of lead remains. Solder. ...

Page 3

... Install these two switches first. www.DataSheet4U.com Be careful not to force any switch into a hole in such a way as to damage the connecting wires. Excessive heating can distort, or even melt the plastic body and ruin the keyswitch. Check the switch again with an ohmmeter for proper operation after soldering it in place ...

Page 4

... U). This is the normal programming for other TV TYPEWRITERS but may need to be modified for your particular application. The parity bit is not used in the CT-1024 but the " ...

Page 5

... As soon as the scanning stops, a time delay is started and controlled by R1 and C1. This takes into account any switch closure bounce or noise and makes sure the key is firmly down and not just brushed on the way by. After the delay time, an output "keypressed" strobe is made available. This tells whatever you attach to your keyboard that the code is ready for use and valid ...

Page 6

... If you do have problems with your keyboard there are several tests you can perform which may help you locate the problem. You will need an ohmmeter, an oscilloscope, and a DC voltmeter for these tests. First go back and check once more for proper component installation and for solder bridges or cold solder www ...

Page 7

C1, C5 www.DataSheet4U.com C2 C3 ICI IC2 IC3 S1-S2 S3-S56 Parts List - KBD-5 Keyboard Resistors 680K ohm 1/4 watt resistor 100K ohm 1/4 watt ...

Page 8

... BS CAN SUB ESC AY-5-2376 Keyboard Encoder “ ...

Page 9

CONNECT TO OBTAIN NORMAL Y0 SHIFT 31 CONTROL NORMAL YI SHIFT 30 CONTROL NORMAL www.DataSheet4U.com Y2 SHIFT 29 CONTROL NORMAL Y3 SHIFT 28 CONTROL NORMAL Y4 SHIFT 27 CONTROL NORMAL Y5 SHIFT 26 CONTROL NORMAL Y6 SHIFT 25 CONTROL NORMAL ...

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These are the modifications that I did on my CT-1024 System The backspace key is not connected to anything. To generate a BS(08) connect a wire from one pin of the key switch to Y5 (IC1 pin 26). Connect a ...

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