ST STM32303C-EVAL User manual

November 2012 Doc ID 023892 Rev 1 1/65
UM1590
User manual
STM32303C-EVAL demonstration firmware
Introduction
This user manual describes the demonstration firmware running on the STM32303C-EVAL
evaluation board, which can be used to evaluate the capabilities of the STM32F30x/31x
microcontroller and on-board peripherals.
This demo contains many applications that can be easily reused, such as dual interface (I2C
and RF) EEPROM application (ESL and DataLogger), infrared RC5 and SIRC receiver and
transmitter, RTC calendar, file system FAT implementation on SD Card, wave player using
STM32 I2S peripheral, temperature sensor interfacing and TFT LCD.
The STM32303C-EVAL demonstration firmware is provided with the demonstration
programmed in the internal Flash memory, and all the files needed by the demonstration are
programmed in the MicroSD card. The demonstration is executed at each reset (board
power-up, external reset, etc.).
In case the STM32303C-EVAL board was not factory-programmed, or the demonstration
application was erased, or the STM32303C-EVAL board configuration needs to be modified,
the Bootloader, IAP or STM32 STLink Utility can be used to program this file. For more
details, refer to Section 3: STM32303C-EVAL demonstration package and Section 4:
STM32303C-EVAL demonstration programming.
Note: Before you execute the demonstration, make sure that all EVAL board jumpers are well
configured. For more details, refer to Chapter 1.9.12: STM32303C-EVAL board jumper
configuration.
This demonstration firmware and other firmware packages are available for download from
the STMicroelectronics website: www.st.com.
Table 1. Applicable products and tools
Type Applicable products and tools
Evaluation tools STM32303C-EVAL
www.st.com

Contents UM1590
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Contents
1 Functional description of the evaluation board . . . . . . . . . . . . . . . . . . . 7
1.1 Power control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.2 Clocking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.3 Reset control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.4 Debug JTAG interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.5 Serial wire debugger interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.6 Embedded ST-LINK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.7 Display devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.7.1 LCD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.7.2 LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.7.3 LDR (Light Dependent Resistor) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.8 Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.8.1 RS232, RS485 and IrDA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.9 Miscellaneous peripherals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.9.1 Joystick . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.9.2 Push-buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.9.3 Potentiometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.9.4 Audio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.9.5 MicroSD card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.9.6 RF EEPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.9.7 IR LED and IR receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.9.8 Brightness LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1.9.9 Humidity sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1.9.10 Temperature sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1.9.11 Touchsensing buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1.9.12 STM32303C-EVAL board jumper configuration . . . . . . . . . . . . . . . . . . . 10
2 Running the demonstration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.1 Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.1.1 Demonstration startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.1.2 Navigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.2 Clock sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2.2.1 Clock control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

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2.2.2 Clock failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2.3 STM32F30x/31x resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2.3.1 Peripherals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2.3.2 Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
2.3.3 External interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
2.3.4 Internal memory size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
2.3.5 External memory organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
2.4 Demonstration applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
2.4.1 Organizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
2.4.2 Image Viewer submenu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
2.4.3 Audio features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
2.4.4 Connectivity submenu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
2.4.5 Thermometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
2.4.6 Low-power modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
2.4.7 RF EEPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
2.4.8 High brightness LED and LDR application . . . . . . . . . . . . . . . . . . . . . . 54
2.4.9 Humidity measurement application . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
2.4.10 Help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
2.4.11 About submenu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
3 STM32303C-EVAL demonstration package . . . . . . . . . . . . . . . . . . . . . 61
4 STM32303C-EVAL demonstration programming . . . . . . . . . . . . . . . . . 63
4.1 Programming the media files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
4.2 Programming the demo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
4.2.1 Using Bootloader . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
4.2.2 Using IAP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
4.2.3 Using preconfigured projects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
5 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

List of tables UM1590
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List of tables
Table 1. Applicable products and tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Table 2. STM32F30x/31x demonstration peripherals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Table 3. STM32F30x/31x demonstration interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Table 4. STM32F30x/31x demonstration external interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Table 5. M24LR64 memory organization (ESL application) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Table 6. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

UM1590 List of figures
Doc ID 023892 Rev 1 5/65
List of figures
Figure 1. Evaluation board overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 2. Structure of the demonstration menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 3. MicroSD card check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 4. Warning message. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 5. ST logo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 6. STM32F3 presentation slide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 7. Time and date configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 8. Main menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 9. Corresponding submenus. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 10. Navigating in the demonstration menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 11. Clock tree diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 12. No HSE clock detected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 13. Standby mode entered . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 14. Internal Flash memory organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 15. MicroSD card organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 16. MicroSD card removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 17. Organizer menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 18. Setting the time and date . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 19. Time Adjust submenu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 20. Time Show submenu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 21. Setting the year. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 22. Setting the month . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 23. Setting the day of the month. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 24. Exiting the Date Show submenu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 25. StopWatch submenu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 26. Lap timer submenu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Figure 27. Setting the alarm activation time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Figure 28. Alarm Show submenu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Figure 29. Message displayed if time and date need setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 30. Image Viewer submenu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 31. STM32 Image Viewer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Figure 32. Wave player submenu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Figure 33. Wave player interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Figure 34. Wave player playing submenu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Figure 35. Pause submenu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Figure 36. IR transmitter menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Figure 37. IR transmitter command menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Figure 38. IR receiver menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Figure 39. IR receiver application menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Figure 40. IR receiver command menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Figure 41. USB mass storage menu 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Figure 42. USB mass storage menu 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Figure 43. Thermometer submenu selected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Figure 44. Temperature display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Figure 45. Warning temperature display 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Figure 46. Warning temperature display 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Figure 47. Temperature sensor error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Figure 48. Exiting Stop mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

List of figures UM1590
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Figure 49. Stop mode entered exit EXTI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Figure 50. MCU in the Stop mode Exit EXTI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Figure 51. RTC Alarm causes the MCU to exit Stop mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Figure 52. Setting the wakeup time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Figure 53. RTC Alarm wakeup configured. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Figure 54. RTC Alarm wakeup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Figure 55. Time and date configuration prompt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Figure 56. Entering Standby mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Figure 57. MCU in Standby mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Figure 58. RTC Alarm causes the MCU to exit the Standby mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Figure 59. Setting the wakeup time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Figure 60. RTC Alarm wakeup configured. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Figure 61. Time and date configuration prompt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Figure 62. RF EEPROM daughter board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Figure 63. M24LR64-R block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Figure 64. RF EEPROM menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Figure 65. ESL application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Figure 66. ESL setting menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Figure 67. Communication block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Figure 68. DataLogger submenu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Figure 69. DataLogger dialog box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Figure 70. DataLogger curve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Figure 71. Brightness level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Figure 72. Humidity calibration 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Figure 73. Humidity calibration 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Figure 74. Humidity measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Figure 75. Help menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Figure 76. Navigation menu 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Figure 77. Navigation menu 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Figure 78. Jumper configuration menu 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Figure 79. Jumper configuration menu 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Figure 80. Jumper configuration menu 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Figure 81. Jumper configuration menu 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Figure 82. About submenu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Figure 83. STM303C-EVAL demonstration package directory tree. . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Figure 84. MicroSD Card directory organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

UM1590 Functional description of the evaluation board
Doc ID 023892 Rev 1 7/65
1 Functional description of the evaluation board
The STM32303C-EVAL evaluation board provides a development and demonstration
platform. It is designed to allow the user to try out the major functions of the
STM32F30x/31x microcontroller.
Figure 1 summarizes the main functional blocks of the evaluation board.
Figure 1. Evaluation board overview
1.1 Power control
The evaluation board can be powered from an external 5 V supply, from the USB connector
or from the ST-Link connector. All other required voltages are provided by on-board voltage
regulators.
MS31374V1
ComparatorPotentiometer
IR LED &
IR receiver
IRTIM
PWM
CAN
CAN driver
& connector
USB
connector USB FS
Humidity
Sensor
High current
LEDs
Touch Sensing
buttons
Key button
Photo-R
LEDs
Joystick
PWM
PWM
TIM
Comparator
TS controller
Comparator
GPIO
Motor Control
connector 1
Motor Control
connector 2
Voltage
translator
RS232
transceiver RS232/RS485
connector
RS485
transceiver
IrDA
transceiver
USART1
STM32F303VCT6
Embedded ST-
LINK/V2
USB TypeB
connector
JTAG & Trace
connector
Voltage
translator
MicroSD card
Dot Matrix LCD
EEPROM
Audio
Amplifier
EEPROM
Temperature
Sensor
RF EEPROM
connector
Extension connector
for GPIOs
3.3V regulator
2.0V to 3.6V
adjustable regulator
Microphone
I2C
DAC
I2S
SPI2
JTAG

Functional description of the evaluation board UM1590
8/65 Doc ID 023892 Rev 1
1.2 Clocking
Two clock sources are available on the STM32303C-EVAL evaluation board:
●32 KHz crystal for embedded RTC
●8 MHz crystal for the STM32F30x/31x main clock system
1.3 Reset control
The reset can be generated by hardware or software:
●Reset button: activates the RESET input when pressed
●JTAG reset
1.4 Debug JTAG interface
Software debug is done via the standard ARM®JTAG connection: 20-pin IDC (insulation
displacement connector) for connection to the standard ARM host interface.
1.5 Serial wire debugger interface
The Serial Wire Debug Port (SWD-DP) provides a 2-pin (clock + data) interface to the AHP-
AP port.
1.6 Embedded ST-LINK
An ST-LINK is integrated on the board as an embedded in-circuit debugger and programmer
for the STM32F30x/31x MCU.
1.7 Display devices
1.7.1 LCD
A TFT color LCD module is mounted on the STM32303C-EVAL board. It is interfaced
through the embedded SPI peripheral.
1.7.2 LEDs
Four general-purpose LEDs are available. They are used as a display.
1.7.3 LDR (Light Dependent Resistor)
The VDDA supply is divided by a resistor bridge of LDR VT9ON1 and 8.2 KΩresistor and
connected to PA0.

UM1590 Functional description of the evaluation board
Doc ID 023892 Rev 1 9/65
1.8 Interfaces
1.8.1 RS232, RS485 and IrDA
RS232, RS485 and IrDA communications are performed through the following connectors:
●RS232 and RS485: a D-type 9-pin coonector (CN8)
●IrDA transceiver U10 is connected to USART1 of the board STM32F30x/31x.
1.9 Miscellaneous peripherals
1.9.1 Joystick
The STM32303C-EVAL evaluation board features a four-direction joystick with a selection
button at the center named SEL.
1.9.2 Push-buttons
The following push-buttons are available:
●KEY
1.9.3 Potentiometer
A successive approximation ADC channel (ADC12) is connected to an on-board variable
resistor. The variable resistor provides a voltage in the range of 0 V to 3.3 V.
1.9.4 Audio
The STM32303C-EVAL evaluation board supports stereo audio play, using an audio
DAC CS42L52 connected to I2S2 port of STM32F30x/31x microcontroller.
1.9.5 MicroSD card
The STM32303C-EVAL evaluation board features a MicroSD card connector connected to
the SPI peripheral.
1.9.6 RF EEPROM
RF EEPROM daughter board implemented on the module is the M24LR64-R. The daughter
board can be connected on CN1 to the STM32F30x/31x via the I2C bus.
The I2C address of the RF EEPROM is 0b1010E2E1E0. The E0-E2 values are determined
by the RF EEPROM daughter board.
1.9.7 IR LED and IR receiver
The IR receiver TSOP34836 is connected to PA9 on the STM32F30x/31x. The IR LED is
driven by PB9 through transistors T4 and T5 on the board.

Functional description of the evaluation board UM1590
10/65 Doc ID 023892 Rev 1
1.9.8 Brightness LED
The board features an amber high brightnes LED and its power control circuits.
The brightness can be adjusted by a PWM signal issued by the STM32F30x/31x through
PE13.
The LED supply current can be monitored by the STM32F30x/31x through PD14.
1.9.9 Humidity sensor
The board embeds a humidity sensor HS1101LF. The charge control signal is connected to
timer in STM32F30x/31x through PC8 and measured result of HS1101LF is connected with
PB0.
1.9.10 Temperature sensor
The STM32303C-EVAL evaluation board includes a temperature sensor connected to the
I2C2 peripheral.
1.9.11 Touchsensing buttons
The STM32303C-EVAL evaluation board supports two touchsensing buttons based on
either RC charging or charge transfer technology. The charge transfer technology is enabled
by default.
1.9.12 STM32303C-EVAL board jumper configuration
For the demonstration to run correctly on the board, configure the following STM32303C-
EVAL board jumpers as follows:
●JP1: fitted
●JP5: fitted in position 1<->2
●JP6: fitted in position 1<->2
●JP11: fitted
●JP12: fitted
●JP15: fitted in position 2<->3
●JP16: fitted in position 2<->3
●JP17: fitted in position 1<->2
Note: Set JP16 in BAT position to save time even if the evaluation board is powered off.