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Inter-integrated circuit (I2C) interface RM0453

1080/1461 RM0453 Rev 1

Figure 288. Master clock generation

Caution: In order to be I

C or SMBus compliant, the master clock must respect the timings given the

table below.

MS19858V1

SYNC1

SCL high level detected

SCLH counter starts

SCLH

SCL

SCL master clock generation

SCL released

SCL low level detected

SCLL counter starts

SCL driven low

SCLL

SYNC2

SCL master clock synchronization

SCLL

SCL driven low by

another device

SCL low level detected

SCLL counter starts

SCL released

SCLH

SCL high level detected

SCLH counter starts

SCL high level detected

SCLH counter starts

SCL low level detected

SCLL counter starts

SCLL

SCL driven low by

another device

SCLH

SCL high level detected

SCLH counter starts

Default Chapter1
- Sub-Ghz Radio Generic Synchronization Word Control Register1
- Table of Contents2
- Sub-Ghz Radio Generic Synchronization Word Control Register2
- SYSCFG External Interrupt Configuration Register3
Documentation Conventions58
- General Information58
- List of Abbreviations for Registers58
- Glossary59
- Availability of Peripherals59
Memory and Bus Architecture60
- System Architecture60
- Boot Configuration62
- Table 1. Device Boot Mode62
- CPU2 Boot64
- SRAM Erase65
- Memory Protection65
- Table 2. SRAM Erase Conditions65
- Figure 2. Memory Protection Example67
- Table 3. Memory Security and Privilege Access68
- Memory Organization70
Global Security Controller (GTZC)77
- GTZC Introduction77
- GTZC Main Features77
- GTZC Security System Architecture77
- GTZC Functional Description78
- GTZC TZSC Registers84
- GTZC TZIC Registers92
Embedded Flash Memory (FLASH)97
- FLASH Introduction97
- FLASH Main Features97
- FLASH Functional Description97
- FLASH Option Bytes112
- Secure System Memory116
  - Introduction116
  - RSSLIB Functions116
- Flash Memory Protection117
- FLASH Program Erase Suspension125
- FLASH Interrupts126
  - Illegal Access Interrupts126
  - Table 23. Flash Interrupt Requests126
- Register Access Protection127
- FLASH Registers128
Sub-Ghz Radio (SUBGHZ)154
- Sub-Ghz Radio Introduction154
- Sub-Ghz Radio Main Features154
- Sub-Ghz Radio Functional Description155
- Sub-Ghz Radio Clocks159
- Sub-Ghz Radio Modems160
- Sub-Ghz Radio Data Buffer168
- Sub-Ghz Radio Operating Modes169
- Sub-Ghz Radio SPI Interface174
- Sub-Ghz Radio Application Configuration205
- Sub-Ghz Radio Registers207
Power Control (PWR)219
- Power Supplies219
- Power Supply Supervisor225
- Radio Busy Management228
- Figure 22. EOL Thresholds228
- Figure 23. Radio Busy Management229
- CPU2 Boot230
- Figure 24. CPU2 Boot Options231
- Low-Power Modes232
- PWR Registers254
Reset and Clock Control (RCC)277
- Reset277
- Clocks279
- Low-Power Modes296
- Table 62. Low-Power Debug Configurations296
- RCC Registers298
Hardware Semaphore (HSEM)365
- Introduction365
- Main Features365
- Functional Description366
- HSEM Registers372
Inter-Processor Communication Controller (IPCC)379
- IPCC Introduction379
- IPCC Main Features379
- IPCC Functional Description379
- IPCC Registers386
General-Purpose I/Os (GPIO)393
- GPIO Introduction393
- GPIO Main Features393
- GPIO Functional Description393
- GPIO Registers402
System Configuration Controller (SYSCFG)428
- SYSCFG Main Features428
- SYSCFG Registers428
Peripherals Interconnect Matrix446
- Introduction446
- Connection Summary446
- Table 76. Stm32Wl5X Peripherals Interconnect Matrix446
- Interconnection Details447
Direct Memory Access Controller (DMA)454
- Introduction454
- DMA Main Features454
- DMA Implementation455
- DMA Functional Description456
- DMA Interrupts466
- DMA Registers466
DMA Request Multiplexer (DMAMUX)480
- Introduction480
- DMAMUX Main Features481
- DMAMUX Implementation481
- DMAMUX Functional Description484
- DMAMUX Interrupts490
- Table 87. DMAMUX Interrupts490
- DMAMUX Registers492
Nested Vectored Interrupt Controller (NVIC)499
- NVIC Main Features499
- Interrupt Block Diagram499
- Interrupt and Exception Vectors500
- Table 89. CPU1 Vector Table500
- Figure 53. Interrupt Block Diagram500
- Table 90. CPU2 Vector Table503
Extended Interrupts and Event Controller (EXTI)506
- EXTI Main Features506
- EXTI Block Diagram506
- Table 91. EXTI Pin Overview507
- Table 92. EVG Pin Overview507
- Figure 54. EXTI Block Diagram507
- EXTI Connections between Peripherals and CPU508
  - EXTI Wakeup Interrupt List508
  - Table 93. Wakeup Interrupts508
- EXTI Functional Description510
- EXTI Functional Behavior512
- Table 95. Masking Functionality512
- Figure 56. Direct Event Trigger Logic CPU Wakeup512
- EXTI Registers513
Cyclic Redundancy Check Calculation Unit (CRC)525
- Introduction525
- CRC Main Features525
- CRC Functional Description526
- CRC Registers528
Analog-To-Digital Converter (ADC)532
- Introduction532
- ADC Main Features533
- ADC Functional Description534
- Conversion on External Trigger and Trigger Polarity (EXTSEL, EXTEN)547
- Data Management552
- Low-Power Features555
- Analog Window Watchdog (AWD1EN, AWD1SGL, AWD1CH, Adc_Awdxcr, Adc_Awdxtr)558
- Oversampler562
- Temperature Sensor and Internal Reference Voltage565
- Figure 83. Triggered Oversampling Mode (TOVS Bit = 1)565
- Figure 84. Temperature Sensor and VREFINT Channel Block Diagram566
- Battery Voltage Monitoring567
- ADC Interrupts568
- Table 109. ADC Interrupts568
- Figure 85. VBAT Channel Block Diagram568
- ADC Registers570
- ADC Register Map591
- Table 110. ADC Register Map and Reset Values591
Digital-To-Analog Converter (DAC)593
- Introduction593
- DAC Main Features593
- DAC Implementation594
- Table 111. DAC Features594
- DAC Functional Description595
- DAC Low-Power Modes606
- Table 117. Effect of Low-Power Modes on DAC606
- DAC Interrupts607
- Table 118. DAC Interrupts607
- DAC Registers608
Voltage Reference Buffer (VREFBUF)619
- Introduction619
- VREFBUF Functional Description619
- Table 120. VREF Buffer Modes619
- VREFBUF Registers620
Comparator (COMP)622
- COMP Introduction622
- COMP Main Features622
- COMP Functional Description623
- COMP Low-Power Modes628
- COMP Interrupts628
- Table 126. Comparator Behavior in the Low-Power Modes628
- Table 127. Interrupt Control Bits628
- COMP Registers629
True Random Number Generator (RNG)634
- Introduction634
- RNG Main Features634
- RNG Functional Description635
- RNG Interrupts642
- RNG Processing Time643
- RNG Entropy Source Validation643
- RNG Registers645
AES Hardware Accelerator (AES)650
- Introduction650
- AES Main Features650
- AES Implementation651
- AES Functional Description651
- AES Interrupts685
- AES Processing Latency686
- Table 139. AES Interrupt Requests686
- Table 140. Processing Latency for ECB, CBC and CTR686
- Table 141. Processing Latency for GCM and CCM (in Clock Cycles)686
- AES Registers687
Public Key Accelerator (PKA)699
- Introduction699
- PKA Main Features699
- PKA Functional Description699
- PKA Operating Modes705
- Example of Configurations and Processing Times717
- PKA Interrupts724
- Table 171. ECDSA Verification Average Computation Times724
- Table 172. Point on Elliptic Curve Fp Check Average Computation Times724
- Table 173. Montgomery Parameters Average Computation Times724
- Table 174. PKA Interrupt Requests724
- PKA Registers725
Advanced-Control Timer (TIM1)729
- TIM1 Introduction729
- TIM1 Main Features730
- Figure 128. Advanced-Control Timer Block Diagram731
- TIM1 Functional Description732
- TIM1 Registers790
General-Purpose Timer (TIM2)830
- TIM2 Introduction830
- TIM2 Main Features830
- Figure 188. General-Purpose Timer Block Diagram831
- TIM2 Functional Description832
- TIM2 Registers874
General-Purpose Timers (TIM16/TIM17)902
- TIM16/TIM17 Introduction902
- TIM16/TIM17 Main Features902
- Figure 237. TIM16/TIM17 Block Diagram903
- TIM16/TIM17 Functional Description904
- TIM16/TIM17 Registers930
Low-Power Timer (LPTIM)953
- Introduction953
- LPTIM Main Features953
- LPTIM Implementation954
- LPTIM Functional Description954
- LPTIM Low-Power Modes968
- LPTIM Interrupts968
- Table 201. Effect of Low-Power Modes on the LPTIM968
- Table 202. Interrupt Events968
- LPTIM Registers969
Infrared Interface (IRTIM)982
- Figure 269. IRTIM Internal Hardware Connections with TIM16 and TIM17982
Independent Watchdog (IWDG)983
- Introduction983
- IWDG Main Features983
- IWDG Functional Description983
- IWDG Registers986
System Window Watchdog (WWDG)992
- Introduction992
- WWDG Main Features992
- WWDG Functional Description992
- WWDG Interrupts995
- WWDG Registers995
Real-Time Clock (RTC)998
- Introduction998
- RTC Main Features998
- RTC Functional Description999
- RTC Low-Power Modes1016
- Table 212. Effect of Low-Power Modes on RTC1016
- Table 213. RTC Pins Functionality over Modes1016
- RTC Interrupts1017
- Table 214. Interrupt Requests1017
- RTC Registers1018
Tamper and Backup Registers (TAMP)1041
- Introduction1041
- TAMP Main Features1041
- TAMP Functional Description1042
- TAMP Low-Power Modes1046
- TAMP Interrupts1046
- Table 219. Effect of Low-Power Modes on TAMP1046
- Table 220. Interrupt Requests1046
- TAMP Registers1047
Inter-Integrated Circuit (I2C) Interface1058
- Introduction1058
- I2C Main Features1058
- I2C Implementation1059
- I2C Functional Description1059
- I2C Low-Power Modes1108
- Table 236. Effect of Low-Power Modes on the I2C1108
- I2C Interrupts1109
- Table 237. I2C Interrupt Requests1109
- I2C Registers1110
Universal Synchronous/Asynchronous Receiver1127
Transmitter (USART/UART)1127
- USART Introduction1127
- USART Main Features1128
- USART Extended Features1129
- USART Implementation1129
- Table 239. USART / LPUART Features1129
- USART Functional Description1130
- USART in Low-Power Modes1176
- Table 244. Effect of Low-Power Modes on the USART1176
- USART Interrupts1177
- Table 245. USART Interrupt Requests1177
- USART Registers1178
Low-Power Universal Asynchronous Receiver1214
Transmitter (LPUART)1214
- LPUART Introduction1214
- LPUART Main Features1215
- LPUART Implementation1216
- Table 247. USART / LPUART Features1216
- LPUART Functional Description1217
- LPUART in Low-Power Modes1240
- Table 252. Effect of Low-Power Modes on the LPUART1240
- LPUART Interrupts1241
- Table 253. LPUART Interrupt Requests1241
- LPUART Registers1242
Serial Peripheral Interface / Integrated Interchip Sound (SPI/I2S)1267
- Introduction1267
- SPI Main Features1267
- I2S Main Features1268
- SPI/I2S Implementation1268
- Table 255. Stm32Wl5X SPI and SPI/I2S Implementation1268
- SPI Functional Description1269
- SPI Interrupts1293
- Table 256. SPI Interrupt Requests1293
- I2S Functional Description1294
- I2S Interrupts1312
- Table 258. I2S Interrupt Requests1312
- SPI and I2S Registers1313
Debug Support (DBG)1324
- DBG Introduction and Main Features1324
- DBG Use Cases1325
- DBG Functional Description1325
- Debug Port (DP) Registers1332
- Access Ports1342
- Data Watchpoint and Trace Unit (DWT)1350
- Cross Trigger Interface (CTI) and Cross Trigger Matrix (CTM)1364
- CPU1 ROM Table1384
- CPU1 Breakpoint Unit (FPB)1392
- CPU1 Instrumentation Trace Macrocell (ITM)1399
- CPU1 Trace Port Interface Unit (TPIU)1407
- Microcontroller Debug Unit (DBGMCU)1420
- CPU2 ROM Tables1427
- CPU2 Breakpoint Unit (BPU)1440
Device Electronic Signature1449
- Device Electronic Signature Registers1449
Revision History1453
- Table 288. Document Revision History1453

Brand	ST
Model	STM32WL5 Series
Category	Microcontrollers
Language	English

ST STM32WL5 Series User Manual

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