文件名称:InterefacingPS2Keyboard
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FPGA/keyboard interface is shown in figure 1. When the FPGA “reads” the Data or
Clock inputs both PS2Data_out and PS2Clk_out are kept low which puts the tri-state buffers
in high impedance mode. When the FPGA "writes" a logic 0 on an output, the corresponding
x_out (x = PS2Data or PS2Clk) signal is set high which pulls the line low. When “writing”
logic 1 the FPGA simply sets the x_out signal low.
Clock inputs both PS2Data_out and PS2Clk_out are kept low which puts the tri-state buffers
in high impedance mode. When the FPGA "writes" a logic 0 on an output, the corresponding
x_out (x = PS2Data or PS2Clk) signal is set high which pulls the line low. When “writing”
logic 1 the FPGA simply sets the x_out signal low.
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InterefacingPS2Keyboard.pdf