Difference between revisions of "PS2X49"

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== Features ==
 
== Features ==
  
I like retro-computers. Most of the retro-computer projects use PS/2 keyboards due to the ease of interfacing. I found panel mount connectors nice but hard to find and somewhat expensive. This card works well for the need.
+
I like retro-computers. Most of the retro-computer projects use PS/2 keyboards and mice due to the ease of interfacing. I found panel mount connectors nice but hard to find and somewhat expensive. This card works well for the need.
  
 
* PS/2 keyboard/mouse interface
 
* PS/2 keyboard/mouse interface
 
* Two PS/2 connectors
 
* Two PS/2 connectors
 +
** By convention purple for keyboard and green for mouse
 
* Power options for 3.3V or 5V
 
* Power options for 3.3V or 5V
 
** 3.3V/5V Host and 3.3V/5V Keyboard/Mouse
 
** 3.3V/5V Host and 3.3V/5V Keyboard/Mouse
** Option for bi-directional level translator [https://www.ti.com/lit/ds/symlink/txs0104e.pdf TXS0104]
+
** Option for bi-directional level translator [https://www.ti.com/lit/ds/symlink/txs0104e.pdf TXS0104EDR]
 +
*** 10K pull-ups on both sides
 
* Bypass resistors for direct connection
 
* Bypass resistors for direct connection
 +
 +
=== Level Shifter Details ===
 +
 +
* Optional bi-directional level translator [https://www.ti.com/lit/ds/symlink/txs0104e.pdf TXS0104EDR]
 +
** 10K pull-ups on both sides
 +
* 0.65V to 3.6 V on A port and 2.3 V to 5.5 V on Bport (VCCA≤VCCB)
 +
 +
[[File:TXS0108Arch.PNG]]
 +
 +
== PS/2 Interface Description ==
 +
 +
* [http://www.burtonsys.com/ps2_chapweske.htm PS/2 Keyboard/Mouse details]
 +
* [https://en.wikipedia.org/wiki/PS/2_port Wikipedia on PS/2]
  
 
== Connectors ==
 
== Connectors ==
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=== J1 - PS/2 #1 ===
 
=== J1 - PS/2 #1 ===
  
* Standard PS/2 MIN-DIN female connector
+
* Standard PS/2 Mini-DIN female connector
 
* Color codes Purple = Keyboard
 
* Color codes Purple = Keyboard
  
 
=== J2 - PS/2 #2 ===
 
=== J2 - PS/2 #2 ===
  
* Standard PS/2 MIN-DIN female connector
+
* Standard PS/2 Mini-DIN female connector
 
* Color codes Green = Mouse
 
* Color codes Green = Mouse
  
 
=== J3 - Host connection ===
 
=== J3 - Host connection ===
  
* PWR1 is the power to the PS/2 #1 connector
+
* PWR1 is the power to the PS/2 #1, #2 connectors
* PWR2 is the power to the PS/2 #2 connector
+
* +3.3V connections are needed when the TXS0104 translator is installed
* +3.3V connections are only needed when the translator is installed
+
* Routing
 +
** CLK1, DAT1 go to J1
 +
** CLK2, DAT2 go to J2
  
 
[[File:J3-schem.PNG]]
 
[[File:J3-schem.PNG]]
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* [[PS2X49 Assembly Sheet]]
 
* [[PS2X49 Assembly Sheet]]
 +
* [[PS2X49 Rev 3 Assembly Sheet]]

Latest revision as of 18:09, 16 May 2022

Tindie-mediums.png

PS2X49 P897 cropped 512pxV.jpg

Features

I like retro-computers. Most of the retro-computer projects use PS/2 keyboards and mice due to the ease of interfacing. I found panel mount connectors nice but hard to find and somewhat expensive. This card works well for the need.

  • PS/2 keyboard/mouse interface
  • Two PS/2 connectors
    • By convention purple for keyboard and green for mouse
  • Power options for 3.3V or 5V
    • 3.3V/5V Host and 3.3V/5V Keyboard/Mouse
    • Option for bi-directional level translator TXS0104EDR
      • 10K pull-ups on both sides
  • Bypass resistors for direct connection

Level Shifter Details

  • Optional bi-directional level translator TXS0104EDR
    • 10K pull-ups on both sides
  • 0.65V to 3.6 V on A port and 2.3 V to 5.5 V on Bport (VCCA≤VCCB)

TXS0108Arch.PNG

PS/2 Interface Description

Connectors

J1 - PS/2 #1

  • Standard PS/2 Mini-DIN female connector
  • Color codes Purple = Keyboard

J2 - PS/2 #2

  • Standard PS/2 Mini-DIN female connector
  • Color codes Green = Mouse

J3 - Host connection

  • PWR1 is the power to the PS/2 #1, #2 connectors
  • +3.3V connections are needed when the TXS0104 translator is installed
  • Routing
    • CLK1, DAT1 go to J1
    • CLK2, DAT2 go to J2

J3-schem.PNG

Assembly Sheet