| ??? 06/08/06 13:16 Read: times |
#118014 - Hold the lines low until KB startup Responding to: ???'s previous message |
Hello Brian,
The PC sees the 'Clock' and 'Data' lines of PS/2 at the startup. When both of these lines go 'H', the PC recognizes the keyboard (or mouse) is up, and starts to send init and identify command to the keyboard. Then, hold these lines 'L' on the PC interface of your device, until the keyboard shows these lines 'H". This Microchip app note will help you, though the code is for PIC :-) "TB058: Demonstrating the Soft Detach Function - With a PS/2 to USB Translator Example" http://ww1.microchip.com/downloads...91058C.pdf http://ww1.microchip.com/downloads...s/0058.zip Tsuneo |
| Topic | Author | Date |
| what host does to PS/2 keyboard at boot? | 01/01/70 00:00 | |
| what host does to PS/2 keyboard at boot? | 01/01/70 00:00 | |
| different for different OS | 01/01/70 00:00 | |
| I think it's more a case of the BIOS | 01/01/70 00:00 | |
| further explanation | 01/01/70 00:00 | |
| Codes at startup | 01/01/70 00:00 | |
| startup codes | 01/01/70 00:00 | |
| Codes at startup | 01/01/70 00:00 | |
| Hold the lines low until KB startup | 01/01/70 00:00 | |
| use half of this | 01/01/70 00:00 | |
| Protocol and MORE | 01/01/70 00:00 | |
| Answer all PC queries | 01/01/70 00:00 | |
| yes | 01/01/70 00:00 | |
| Answer all PC queries | 01/01/70 00:00 | |
| Also check this link | 01/01/70 00:00 | |
| POR??? | 01/01/70 00:00 | |
| Re: POR??? | 01/01/70 00:00 | |
| Two methods | 01/01/70 00:00 | |
| ps2 | 01/01/70 00:00 | |
| eh? | 01/01/70 00:00 | |
problem pretty much resolved | 01/01/70 00:00 |