TinyPS2

From Land Boards Wiki
Revision as of 16:13, 1 January 2020 by Blwikiadmin (talk | contribs) (→‎H2 - In-System Programming Header)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to navigation Jump to search

TinyPS2 P899 cropped-720px.jpg

Features[edit]

  • PS/2 keyboard or mouse to TTL Level Serial converter
  • ATTiny85
  • 115,200 baud
  • 49x49mm ODAS form factor
  • 4-40 mounting holes

Connectors[edit]

J1 - TTL Serial Connector[edit]

  1. 5V
  2. SERTX
  3. N/C
  4. GND

J2 - PS/2[edit]

  • Standard PS/2 Mini-DIN-6 connector

H2 - In-System Programming Header[edit]

  • SPI connector to download ATTiny85
  • 2x3 header
  • Program ATTiny85 without PS/2 keyboard attached
  • Pinout
  1. KBCLK
  2. GND
  3. SERTX
  4. KBDAT
  5. RST*
  6. GND

Firmware[edit]

Schematic[edit]

Issues[edit]

  • Missing pull-up resistors on PS/2
    • Rev 2 - add pull-up resistors
  • Missing C3 cap in sequence
    • Rev 2 - change C4 => C3

Assembly Sheet[edit]