Casio CTK-711EX

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Pin No. Terminal In/Out Function
80 P72 In AC adaptor detection terminal.
81 P73 In Modulation signal input.
82 P74 In Pedal signal input.
83 P75 — Not used.
84 P76 In Key input signal from buttons.
85 DA1 Out LCD contrast control voltage output.
86 AVSS In Ground terminal (0 V).
87 PB0 Out Reset signal for DSP, Key controller.
88 CS3 — Not used.
89 CS2 — Not used.
90 CS1 Out Chip select signal for Key controller.
91 CS0 Out Chip select signal for DSP.
92 VSS In Ground terminal (0 V).
93 TEND — Not used.
94 PA1 — Not used.
95 PA2 Out Key input signal for DEMO button.
96 PA3 Out Clock signal for shift register of KC signal.
97 PA4 Out Clear signal for shift register of LED.
98 PA5 Out Control signal for KC signal and LED.
99 PA6 Out Clock signal for shift register of LED.
100 PA7 Out APO (Auto Power Off) signal.