75
change on the data line in the next clock cycle. If there’s no change on the data line for one clock
cycle, the device will pull low the data line again as an acknowledgement which means that the data
is correctly received.
After the power on cycle of the PS/2 mouse, it enters into stream mode automatically and disable
data transmit unless an enabling instruction is received.
Figure 5-11
shows the waveform while
communication happening on two lines.
Figure 5-11 Waveforms on two lines while communication taking place
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Project directory: DE1_SoC_PS2_DEMO
Bit stream used: DE1_SoC_PS2_DEMO.sof