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ST STM32L4x6 User Manual

ST STM32L4x6
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DocID024597 Rev 3 7/1693
RM0351 Contents
43
6.4.20 APB1 peripheral clock enable register 2 (RCC_APB1ENR2) . . . . . . . 230
6.4.21 APB2 peripheral clock enable register (RCC_APB2ENR) . . . . . . . . . . 232
6.4.22 AHB1 peripheral clocks enable in Sleep and Stop modes register
(RCC_AHB1SMENR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233
6.4.23 AHB2 peripheral clocks enable in Sleep and Stop modes register
(RCC_AHB2SMENR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 234
6.4.24 AHB3 peripheral clocks enable in Sleep and Stop modes register
(RCC_AHB3SMENR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236
6.4.25 APB1 peripheral clocks enable in Sleep and Stop modes register 1
(RCC_APB1SMENR1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 237
6.4.26 APB1 peripheral clocks enable in Sleep and Stop modes register 2
(RCC_APB1SMENR2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 239
6.4.27 APB2 peripheral clocks enable in Sleep and Stop modes register
(RCC_APB2SMENR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 241
6.4.28 Peripherals independent clock configuration register (RCC_CCIPR) . 243
6.4.29 Backup domain control register (RCC_BDCR) . . . . . . . . . . . . . . . . . . 246
6.4.30 Control/status register (RCC_CSR) . . . . . . . . . . . . . . . . . . . . . . . . . . . 248
6.4.31 RCC register map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250
7 General-purpose I/Os (GPIO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254
7.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254
7.2 GPIO main features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254
7.3 GPIO functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254
7.3.1 General-purpose I/O (GPIO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 257
7.3.2 I/O pin alternate function multiplexer and mapping . . . . . . . . . . . . . . . 257
7.3.3 I/O port control registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 258
7.3.4 I/O port data registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 258
7.3.5 I/O data bitwise handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 258
7.3.6 GPIO locking mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 259
7.3.7 I/O alternate function input/output . . . . . . . . . . . . . . . . . . . . . . . . . . . . 259
7.3.8 External interrupt/wakeup lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 259
7.3.9 Input configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 259
7.3.10 Output configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260
7.3.11 Alternate function configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 261
7.3.12 Analog configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 262
7.3.13 Using the HSE or LSE oscillator pins as GPIOs . . . . . . . . . . . . . . . . . 263
7.3.14 Using the GPIO pins in the RTC supply domain . . . . . . . . . . . . . . . . . 263
7.4 GPIO registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 264

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ST STM32L4x6 Specifications

General IconGeneral
BrandST
ModelSTM32L4x6
CategoryMicrocontrollers
LanguageEnglish

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