GigaDevice Semiconductor GD32VF103 - Figure 15-9. Repetition Counter Timing Chart of Center-Aligned Counting Mode; Figure 15-10. Repetition Counter Timing Chart of up Counting Mode

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GD32VF103 User Manual

232

For odd values of CREP in center-aligned mode, the update event occurs either on the

overflow or on the underflow depending on when the CREP register was written and when

the counter was started. The update event is generated at overflow when the CREP was

written before starting the counter and generated at underflow when the CREP was written

after starting the counter.

Figure 15-9. Repetition counter timing chart of center-aligned counting mode

CEN

03 02 01 00 01 02

….

62 63 62 61

….

01 00

Underflow

Overflow

TIMERx_CREP = 0x0

TIMER_CK

….

62 63 62

UPIF

TIMERx_CREP = 0x1

….

01 00

….

62 63 62

UPIF

TIMERx_CREP = 0x2

CNT_CLK

Figure 15-10. Repetition counter timing chart of up counting mode

CEN

CNT_REG

60 61 62 63 00 01

…

62 63 00 01

…

62 63

Underflow

Overflow

TIMERx_CREP = 0x0

TIMER_CK

…

62 63 00

UPIF

TIMERx_CREP = 0x1

…

62 63

…

62 63 00

UPIF

TIMERx_CREP = 0x2

CNT_CLK

Main Page

Table of Contents2
List of Figures14
List of Tables20
1 System and Memory Architecture22
- Risc-V Cpu22
- System Architecture22
- Table 1-1. the Interconnection Relationship of the AHB Interconnect Matrix23
- Figure 1-1. GD32VF103 System Architecture24
- Memory Map24
- On-Chip Flash Memory Overview28
- On-Chip SRAM Memory28
- Boot Configuration29
- Device Electronic Signature29
2 Flash Memory Controller (FMC)32
- Characteristics32
- Function Overview32
  - Flash Memory Architecture32
- Overview32
  - Figure 2-1. Process of Page Erase Operation34
  - Main Flash Programming35
- Mass Erase34
3 Power Management Unit (PMU)47
- Characteristics47
- Figure 3-1. Power Supply Overview47
- Function Overview47
- Overview47
- Battery Backup Domain48
- VDD /V Dda48
- Power Domain51
- Power Saving Modes51
4 Backup Registers (BKP)57
- Overview57
- Characteristics57
- Function Overview57
  - RTC Clock Calibration57
  - Tamper Detection58
- Register Definition59
5 Reset and Clock Unit (RCU)62
- Reset Control Unit (RCTL)62
  - Overview62
  - Function Overview62
- Clock Control Unit (CCTL)63
- Characteristics65
6 Interrupt/Event Controller (EXTI)94
- Characteristics94
- Function Overview94
- Overview94
- Table 6-1. Interrupt Vector Table95
- External Interrupt and Event (EXTI) Block Diagram97
- External Interrupt and Event Function Overview97
- Register Definition99
7 General-Purpose and Alternate-Function I/Os (GPIO and AFIO)102
- Characteristics102
- Function Overview102
- Overview102
  - Figure 7.1. Basic Structure of a Standard I/O Port Bit103
  - Output Configuration105
- Alternate Functions (AF)104
- External Interrupt/Event Lines104
- Input Configuration104
- Figure 7.5. Alternate Function Configuration106
- Figure 7.4. Analog Configuration106
- GPIO Locking Function107
- IO Pin Function Selection107
- Remapping Function I/O and Debug Configuration108
- Table 7.5. TIMER1 Alternate Function Remapping109
- TIMER AF Remapping109
- I2C0 AF Remapping110
- Table 7.10. USART1 Alternate Function Remapping110
- Table 7.14. SPI2/I2S2 Alternate Function Remapping111
- CLK Pins AF Remapping112
8 CRC Calculation Unit (CRC)129
- Overview129
- Characteristics129
9 Direct Memory Access Controller (DMA)133
- Characteristics133
- Overview133
- Block Diagram134
- Figure 9-1. Block Diagram of DMA134
- Function Overview134
- Arbitration136
- Table 9-4. DMA1 Requests for each Channel139
- Table 9-3. DMA0 Requests for each Channel139
- Figure 9-4. DMA0 Request Mapping139
- Figure 9-5. DMA1 Request Mapping140
- Register Definition142
10 Debug (DBG)148
- Overview148
- JTAG Function Overview148
- Debug Hold Function Overview149
  - Debug Support for Power Saving Mode149
  - Debug Support for TIMER, I2C, WWDGT, FWDGT and CAN149
- Register Definition150
  - ID Code Register (DBG_ID)150
  - Control Register (DBG_CTL)150
11 Analog-To-Digital Converter (ADC)153
- Introduction153
- Main Features153
- Figure 11-1. ADC Module Block Diagram154
- Functional Description154
- Pins and Internal Signals154
- Table 11-1. ADC Internal Signals154
- Table 11-2. ADC Pins Definition154
- Calibration (CLB)155
- ADC Clock156
- ADCON Switch156
- Conversion Modes156
- Regular and Inserted Channel Groups156
- Inserted Channel Management160
12 Digital-To-Analog Converter (DAC)188
- Characteristics188
- Overview188
- DAC Conversion190
- DAC Data Configuration190
- DAC Output Buffer190
- DAC Trigger190
- Figure 12-3. DAC Triangle Noise Wave191
- Figure 12-2. DAC LFSR Algorithm191
- DAC Concurrent Conversion192
- DAC Output Voltage192
- DMA Request192
- Register Definition193
13 Watchdog Timer (WDGT)202
- Free Watchdog Timer (FWDGT)202
- Table 13.1. Min/Max FWDGT Timeout Period at 40 Khz (IRC40K)203
- Figure 13.1. Free Watchdog Block Diagram203
- Register Definition205
- Window Watchdog Timer (WWDGT)208
- Figure 13.2. Window Watchdog Timer Block Diagram209
- Table 13.2. Min/Max Timeout Value at 54 Mhz210
- Register Definition211
Figure 13.3. Window Watchdog Timing Diagram210
14 Real-Time Clock (RTC)213
- Characteristics213
- Function Overview213
  - RTC Reset214
  - RTC Reading214
- Overview213
  - Figure 14.1. Block Diagram of RTC214
  - Register Definition217
- RTC Configuration215
- RTC Flag Assertion215
15 Timer(Timerx)222
- Figure 15-1. Advanced Timer Block Diagram224
- Figure 15-4. Timing Chart of up Counting Mode, PSC=0/1226
- Figure 15-10. Repetition Counter Timing Chart of up Counting Mode232
- Figure 15-20. Example of Counter Operation in Encoder Interface Mode243
- Figure 15-23. Hall Sensor Timing between Two Timers245
- Figure 15-28. TIMER0 Master/Slave Mode Timer Example248
- Timerx Registers(X=0)254
- General Level0 Timer (Timerx, X=1, 2, 3, 4)279
16 Universal Synchronous/Asynchronous Receiver /Transmitter (USART)328
- Characteristics328
- Overview328
- Function Overview329
- USART Frame Format330
- USART Receiver333
- Figure 16-11. Example of USART in Synchronous Mode339
- Half-Duplex Communication Mode341
- Smartcard (ISO7816-3) Mode341
17 Inter-Integrated Circuit Interface (I2C)354
- Characteristics354
- Function Overview354
- Overview354
- SDA and SCL Lines355
- Arbitration357
- I2C Communication Flow357
- Figure 17-6. I2C Communication Flow with 7-Bit Address358
- SCL Line Stretching367
18 Serial Peripheral Interface/Inter-IC Sound (SPI/I2S)380
- Characteristics380
  - SPI Characteristics380
  - I2S Characteristics380
- Overview380
- Figure 18-1. Block Diagram of SPI381
- SPI Block Diagram381
- SPI Signal Description381
  - Normal Configuration381
  - Table 18-1. SPI Signal Description381
  - Figure 18-2. SPI Timing Diagram in Normal Mode382
  - SPI Operating Modes383
- SPI Function Overview382
  - NSS Function382
  - SPI Clock Timing and Data Format382
  - Table 18-2. SPI Operating Modes383
  - Figure 18-5. a Typical Simplex Connection (Master: Transmit Only, Slave: Receive)384
  - Figure 18-3. a Typical Full-Duplex Connection384
  - Figure 18-4. a Typical Simplex Connection (Master: Receive, Slave: Transmit)384
  - Figure 18-6. a Typical Bidirectional Connection385
  - Figure 18-7. Timing Diagram of TI Master Mode with Discontinuous Transfer386
  - Figure 18-9. Timing Diagram of TI Slave Mode387
  - Figure 18-8. Timing Diagram of TI Master Mode with Continuous Transfer387
  - Table 18-3. SPI Interrupt Requests390
  - Figure 18-11. Block Diagram of I2S391
  - I2S Block Diagram391
  - I2S Signal Description391
  - I2S Function Overview392
    - I2S Audio Standards392
- Figure 18-10. Timing Diagram of NSS Pulse with Continuous Transmission388
- CRC Function389
- DMA Function389
- SPI Interrupts389
  - Status Flags389
  - Error Flags390
  - Figure 18-14. I2S Phillips Standard Timing Diagram (DTLEN=10, CHLEN=1, CKPL=0)393
  - Figure 18-23. MSB Justified Standard Timing Diagram (DTLEN=10, CHLEN=1, CKPL=1)395
  - Figure 18-32. PCM Standard Short Frame Synchronization Mode Timing Diagram (DTLEN=00, CHLEN=0, CKPL=0)397
  - Figure 18-42. PCM Standard Long Frame Synchronization Mode Timing Diagram399
  - Operation401
- Figure 18-19. I2S Phillips Standard Timing Diagram (DTLEN=00, CHLEN=1, CKPL=1)394
- Figure 18-26. MSB Justified Standard Timing Diagram (DTLEN=00, CHLEN=1, CKPL=0)395
- Figure 18-25. MSB Justified Standard Timing Diagram (DTLEN=01, CHLEN=1, CKPL=1)395
- Figure 18-31. LSB Justified Standard Timing Diagram (DTLEN=00, CHLEN=1, CKPL=1)396
- Figure 18-28. LSB Justified Standard Timing Diagram (DTLEN=01, CHLEN=1, CKPL=0)396
- Figure 18-36. PCM Standard Short Frame Synchronization Mode Timing Diagram (DTLEN=01, CHLEN=1, CKPL=0)397
- Figure 18-37. PCM Standard Short Frame Synchronization Mode Timing Diagram397
- Figure 18-45. PCM Standard Long Frame Synchronization Mode Timing Diagram (DTLEN=01, CHLEN=1, CKPL=1)399
- Figure 18-44. PCM Standard Long Frame Synchronization Mode Timing Diagram (DTLEN=01, CHLEN=1, CKPL=0)399
- Figure 18-46. PCM Standard Long Frame Synchronization Mode Timing Diagram (DTLEN=00, CHLEN=1, CKPL=0)399
- Figure 18-48. Block Diagram of I2S Clock Generator400
- I2S Clock400
19 External Memory Controller (EXMC)416
- Characteristics416
- Function Overview416
  - Block Diagram416
  - Basic Regulation of EXMC Access417
- Overview416
- Figure 19-1. the EXMC Block Diagram417
- External Device Address Mapping418
- Figure 19-3. Region of Bank0 Address Mapping418
- Figure 19-2. EXMC Memory Banks418
- NOR/PSRAM Controller418
- Table 19-1. nor Flash Interface Signals Description419
- Table 19-3. EXMC Bank 0 Supports All Transactions419
- Table 19-2. PSRAM Muxed Signal Description419
- Table 19-4. nor / PSRAM Controller Timing Parameters420
- Figure 19-5. Multiplex Mode Write Access421
- Figure 19-4. Multiplex Mode Read Access421
- Table 19-5. Exmc_Timing Models421
- Table 19-6. Multiplex Mode Related Registers Configuration422
- Figure 19-7. Write Access Timing Diagram under Async-Wait Signal Assertion423
- Figure 19-6. Read Access Timing Diagram under Async-Wait Signal Assertion423
- Register Definition424
  - NOR/PSRAM Controller Registers424
20 Controller Area Network (CAN)427
- Characteristics427
- Overview427
- Figure 20-1. CAN Module Block Diagram428
- Function Overview428
  - Working Mode428
- Communication Modes429
- Data Transmission430
- Data Reception432
- Figure 20-5. 32-Bit Filter434
- Figure 20-10. 16-Bit List Mode Filter434
- Figure 20-9. 32-Bit List Mode Filter434
- Figure 20-8. 16-Bit Mask Mode Filter434
- Time-Triggered Communication436
- Communication Parameters437
- Error Flags438
21 Universal Serial Bus Full-Speed Interface (USBFS)461
- Characteristics461
- Overview461
- Block Diagram462
- Figure 21-1. USBFS Block Diagram462
- Function Overview462
  - USBFS Clocks and Working Modes462
- Signal Description462
- Figure 21-2. Connection with Host or Device Mode463
- Figure 21-3. Connection with OTG Mode464
- Figure 21-4. State Transition Diagram of Host Port464
- USB Host Function464
- USB Device Function466
- OTG Function Overview467
- Data FIFO468
22 Revision History535
Table 22-1. Revision History535

GigaDevice Semiconductor GD32VF103 - Figure 15-9. Repetition Counter Timing Chart of Center-Aligned Counting Mode; Figure 15-10. Repetition Counter Timing Chart of up Counting Mode

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