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Both sides previous revision Previous revision Next revision | Previous revision | ||
gecko-platforms:gecko3_staddle [2017/03/10 13:30] – ghj1-local | gecko-platforms:gecko3_staddle [2021/12/20 10:49] (current) – external edit 127.0.0.1 | ||
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===== PS/2 ===== | ===== PS/2 ===== | ||
- | {{: | + | {{: |
There are two PS/2 ports applied to the front panel for user input via keyboard and mouse. The signals are passed through the system bus to the GECKO3main modules. Since both, the input device and the FPGA can drive the line, a short circuit by different signal levels must be prevented. This can be realized using the tri-state outputs of the FPGA, but has to be taken care of by the PS/2 component within the FPGA design. A " | There are two PS/2 ports applied to the front panel for user input via keyboard and mouse. The signals are passed through the system bus to the GECKO3main modules. Since both, the input device and the FPGA can drive the line, a short circuit by different signal levels must be prevented. This can be realized using the tri-state outputs of the FPGA, but has to be taken care of by the PS/2 component within the FPGA design. A " | ||
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Due to the use of continuous areas for equal types of signals, the 18 digital lines to the VGA port are also located in the first section of the IO1 bus. The four signals of the PS2 interfaces are transmitted on lines on the higher connector section. | Due to the use of continuous areas for equal types of signals, the 18 digital lines to the VGA port are also located in the first section of the IO1 bus. The four signals of the PS2 interfaces are transmitted on lines on the higher connector section. | ||
- | ^ Signal Name ^ Pin | + | ^ Signal Name ^ Pin |
| **Soft JTAG Chain** ||| | | **Soft JTAG Chain** ||| | ||
| SOFT_JTAG_TCK | 7| EXTCLK0 | | | SOFT_JTAG_TCK | 7| EXTCLK0 | | ||
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===== Documents ===== | ===== Documents ===== | ||
Schematic: | Schematic: | ||
- | PCB design:{{:gecko: | + | PCB design: |