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ISD94100 データシート(PDF) 55 Page - Nuvoton Technology Corporation |
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ISD94100 データシート(HTML) 55 Page - Nuvoton Technology Corporation |
55 / 109 page ISD94100 Series Datasheet Sep 09, 2019 Page 55 of 109 Rev1.13 6.5 General Purpose I/O (GPIO) 6.5.1 Overview The ISD94100 series device has up to 58 General Purpose I/O (GPIO) pins, grouped in 4 ports PA, PB, PC and PD. Port PA, PC and PD each has 16 pins, and there are 13 pins in Port PB. All the GPIO pins are multi-functional pins, in that they can be I/O pins or they can work as alternate function pins. Each pin can be individually configured. Pin function are defined in MFP registers, for example PA0~7 pin functions are defined in SYS_GPA_MFPL register. When working as an I/O pin, each pin can be configured by software in several modes: Input Push-pull Output Open-Drain Output Quasi-bidirectional After a power-on or reset event, all GPIO pins ’ default working mode are determined by CIOINI bit (CONFIG0[10]) except PA.8. PA.8 pin default I/O mode is determined by GPA8_LOW bit (CONFIG0[11]). Every I/O pin has a weak pull-up resistor with value ~50 k when I/O pin configured as quasi-bidirectional output low. 6.5.2 Features Four I/O modes: Quasi-bidirectional mode Push-Pull Output mode Open-Drain Output mode Input only with high impendence mode TTL/Schmitt trigger input capability I/O pin can be configured as interrupt source with edge/level trigger option Supports High Drive and High Slew Rate I/O mode CIOINI bit (CONFIG0[10]) configures all GPIO pins’ default I/O mode except PA.8 after power-on or reset: CIOINI = 0: Quasi-bidirectional mode, CIOINI = 1: input mode. GPA8_LOW (CONFIG[11]) configures PA.8 pin ’s default I/O mode after power-on or reset: GPA8_LOW = 0: Push-Pull mode and output low, GPA8_LOW = 1: PA.8 follows CIOINI setting. I/O pin internal pull-up only available in Quasi-bidirectional I/O mode Enabling the pin interrupt function will also enable the wake-up function PB0 ~ PB4, PB7 ~ PB9, PB13 ~ PB15, PC2 ~ PC15 and PD0 ~ PD15 support 5V-tolerance functions |
同様の部品番号 - ISD94100 |
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同様の説明 - ISD94100 |
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