Difference between revisions of "TinyPS2"
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* PS/2 keyboard or mouse to TTL Level Serial converter | * PS/2 keyboard or mouse to TTL Level Serial converter | ||
* ATTiny85 | * ATTiny85 | ||
+ | ** 8 KB of flash | ||
+ | ** 8-MHz internal RC oscillator that can be used as the default clock | ||
+ | ** 512 bytes of EEPROM | ||
+ | ** 512 bytes of SRAM | ||
* 115,200 baud | * 115,200 baud | ||
* 49x49mm ODAS form factor | * 49x49mm ODAS form factor |
Revision as of 10:05, 4 May 2022
Contents
Features
- PS/2 keyboard or mouse to TTL Level Serial converter
- ATTiny85
- 8 KB of flash
- 8-MHz internal RC oscillator that can be used as the default clock
- 512 bytes of EEPROM
- 512 bytes of SRAM
- 115,200 baud
- 49x49mm ODAS form factor
- 4-40 mounting holes
Connectors
J1 - TTL Serial Connector
- 5V
- SERTX
- N/C
- GND
J2 - PS/2
- Standard PS/2 Mini-DIN-6 connector
H2 - In-System Programming Header
- SPI connector to download ATTiny85
- 2x3 header
- Program ATTiny85 without PS/2 keyboard attached
- Pinout
- KBCLK
- GND
- SERTX
- KBDAT
- RST*
- GND
Firmware
TinyPS2V01
- PJRC library
- Read PS/2 print to screen
- Resources
Sketch uses 3334 bytes (10%) of program storage space. Maximum is 32256 bytes. Global variables use 377 bytes (18%) of dynamic memory, leaving 1671 bytes for local variables. Maximum is 2048 bytes.
Other People's Videos
Schematic
Issues
- Missing pull-up resistors on PS/2
- Rev 2 - add pull-up resistors
- Missing C3 cap in sequence
- Rev 2 - change C4 => C3