GigaDevice Semiconductor GD32F3x0

To Next Page
To Previous Page
                                                                                                                 GD32F3x0 User Manual 

   
6.6.  Pending register (EXTI_PD) ............................................................................................... 123 
 General-purpose and alternate-function I/Os (GPIO) ........................................ 125 
1.  Overview ....................................................................................................................... 125 
2.  Characteristics ............................................................................................................. 125 
3.  Function overview........................................................................................................ 125 
3.1.  GPIO pin configuration ....................................................................................................... 126 
3.2.  Alternate functions (AF) ...................................................................................................... 127 
3.3.  Additional functions ............................................................................................................. 127 
3.4.  Input configuration .............................................................................................................. 127 
3.5.  Output configuration ........................................................................................................... 128 
3.6.  Analog configuration ........................................................................................................... 128 
3.7.  Alternate function (AF) configuration .................................................................................. 129 
3.8.  GPIO locking function ......................................................................................................... 130 
3.9.  GPIO single cycle toggle function ....................................................................................... 130 
3.10.  GPIO very high speed drive capability ............................................................................... 130 
4.  Register definition........................................................................................................ 131 
4.1.  Port control register (GPIOx_CTL, x=A..D,F) ..................................................................... 131 
4.2.  Port output mode register (GPIOx_OMODE, x=A..D,F) ..................................................... 132 
4.3.  Port output speed register 0 (GPIOx_OSPD0, x=A..D,F) ................................................... 134 
4.4.  Port pull-up/down register (GPIOx_PUD, x=A..D,F) ........................................................... 136 
4.5.  Port input status register (GPIOx_ISTAT, x=A..D,F) ........................................................... 137 
4.6.  Port output control register (GPIOx_OCTL, x=A..D,F) ....................................................... 138 
4.7.  Port bit operate register (GPIOx_BOP, x=A..D,F)............................................................... 138 
4.8.  Port configuration lock register (GPIOx_LOCK, x=A,B) ..................................................... 139 
4.9.  Alternate function selected register 0 (GPIOx_AFSEL0, x=A,B,C) .................................... 140 
4.10.  Alternate function selected register 1 (GPIOx_AFSEL1, x=A,B,C) .................................... 141 
4.11.  Bit clear register (GPIOx_BC, x=A..D,F) ............................................................................ 142 
4.12.  Port bit toggle register (GPIOx_TG, x=A..D,F) ................................................................... 142 
4.13.  Port output speed register 1 (GPIOx_OSPD1, x=A..D,F) ................................................... 143 
 Cyclic redundancy checks management unit (CRC) ........................................ 144 
1.  Overview ....................................................................................................................... 144 
2.  Characteristics ............................................................................................................. 144 
3.  Function overview........................................................................................................ 145 
4.  Register definition........................................................................................................ 146 
4.1.  Data register (CRC_DATA) ................................................................................................. 146 
4.2.  Free data register (CRC_FDATA) ....................................................................................... 146 
4.3.  Control register (CRC_CTL) ............................................................................................... 147 
4.4.  Initialization data register (CRC_IDATA) ............................................................................. 147 
4.5.  Polynomial register (CRC_POLY) ....................................................................................... 148 
GigaDevice Semiconductor GD32F3x0 - Page 5

Table of Contents

Related product manuals
