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What does slew rate function of I/O port mean in SPMC65 family MCU?

April 26, 2017family function mcu mean port rate slew spmc65

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What does slew rate function of I/O port mean in SPMC65 family MCU?

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If slew rate function on PB[7:6] needed to be enable, programming SLOWE bit in P_IO_Opt ($35.0) to “1” will enforce the output high to low transition time to 250ns 20% (determined by Fsys). This function is designed for long-distance communication between MCUs, which can prevent from EMI effectively. It is just like connect a capacitor in parallel to the communication pad.