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STMPE821 датащи(PDF) 25 Page - STMicroelectronics |
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STMPE821 датащи(HTML) 25 Page - STMicroelectronics |
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25 / 55 page ![]() STMPE821 GPIO controller 25/55 The function of each bit is shown in the following table: Table 9. GPIO control bits function Register name Function GPIO monitor pin state Reading this bit yields the current state of the bit. Writing has no effect. GPIO set pin state Writing '1' to this bit causes the corresponding GPIO to go to '1' state Writing '0' to this bit causes the corresponding GPIO to go to '0' state GPIO set pin direction '0' sets the corresponding GPIO to input state, and '1' sets it to output state. All bits are '0' on reset. The GPIO must be set as output if the PWM on this pin is to be used. GPIO function '1' sets the corresponding GPIO to function as GPIO/PWM, and '0' sets it to touch key mode. For GPIO 0-3, if the GPIO function is set to GPIO/PWM mode and the AF bits in the PWM master enable register is enabled, the corresponding GPIO will function as PWM output. |
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