GigaDevice Semiconductor GD32350G-START User manual

GigaDevice Semiconductor Inc.
GD32350G-START
User Guide
V2.0

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Table of Contents
Table of Contents...........................................................................................................1
List of Figures ................................................................................................................2
List of Tables ..................................................................................................................3
1. Summary ..................................................................................................................4
2. Function Pin Assign ................................................................................................4
3. Getting started .........................................................................................................4
4. Hardware layout overview.......................................................................................5
4.1. Power supply............................................................................................................... 5
4.2. Boot option .................................................................................................................. 5
4.3. LED............................................................................................................................... 5
4.4. KEY............................................................................................................................... 6
4.5. USBFS.......................................................................................................................... 6
4.6. GD-Link ........................................................................................................................ 7
4.7. Extension..................................................................................................................... 7
4.8. MCU.............................................................................................................................. 8
5. Routine use guide....................................................................................................8
5.1. GPIO_Running_Led..................................................................................................... 8
5.1.1. DEMO purpose....................................................................................................................... 8
5.1.2. DEMO running Result............................................................................................................. 8
5.2. GPIO_Key_Polling_mode............................................................................................ 8
5.2.1. DEMO purpose....................................................................................................................... 8
5.2.2. DEMO running Result............................................................................................................. 9
5.3. EXTI_Key_Interrupt_mode.......................................................................................... 9
5.3.1. DEMO purpose....................................................................................................................... 9
5.3.2. DEMO running Result............................................................................................................. 9
5.4. USB_FS........................................................................................................................ 9
5.4.1. USBD_CDC_ACM.................................................................................................................. 9
5.4.2. USBH_MSC_Host ................................................................................................................ 10
6. Revision history.....................................................................................................12

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List of Figures
Figure 4-1 Schematic diagram of power supply................................................................................................5
Figure 4-2 Schematic diagram of boot option....................................................................................................5
Figure 4-3 Schematic diagram of LED function.................................................................................................5
Figure 4-4 Schematic diagram of Key function .................................................................................................6
Figure 4-5 Schematic diagram of USBFS function ...........................................................................................6
Figure 4-6 Schematic diagram of GD-Link function.........................................................................................7
Figure 4-7 Schematic diagram of Extension Pin...............................................................................................7
Figure 4-8 Schematic diagram of MCU Pin.........................................................................................................8

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List of Tables
Table 2-1 Pin assignment ........................................................................................................................................4
Table 4-1 Boot configuration..................................................................................................................................5
Table 6-1 Revision history.....................................................................................................................................12

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1. Summary
GD32350G-START board uses GD32F350G8 as the main controller. As a complete
development platform of GD32F3x0 powered by ARM® Cortex™-M4 core, the board
supports full range of peripherals. It uses mini-USB interface or AC/DC adapter to supply 5V
power. SWD, Reset, Boot, User button key, LED and Extension Pin are also included. This
document details its hardware schematic and the relevant applications.
2. Function Pin Assign
Table 2-1 Pin assignment
Function
Pin
Description
LED
PA1
LED1
KEY
PA0
K1-User Key
RESET
K2-Reset
USB
PA11
USBDM
PA12
USBDP
PA8
USBCTR
PA9
USBVBUS
3. Getting started
The START Board uses mini-USB connecter or AC/DC adapter to get power, the hardware
system power is +3.3V. A mini-USB cable are necessary to down programs. Select the
correct boot mode and then power on, the LED3 will turn on, which indicates the power
supply is ready.
There are Keil version and IAR version of all projects. Keil version of the projects are created
based on Keil MDK-ARM 4.74 uVision4. IAR version of the projects are created based on
IAR Embedded Workbench for ARM 7.40.2. During use, the following points should be
noted:
1. If you use Keil uVision4 to open the project, install the GD32F3x0_AddOn.2.0.0.exe to
load the associated files.
2. If you use Keil uVision5 to open the project, there are two ways to solve the "Device
Missing (s)" problem. One is to install GigaDevice.GD32F3x0_DFP.2.0.0.pack. In Project
menu, select the Manage sub menu, click on the “Version Migrate 5 Format...” menu, the Keil
uVision4 project will be converted to Keil uVision5 project. Then add “C:\Keil_v5\ARM\Pack
\ARM\CMSIS\4.2.0\CMSIS\Include” to C/C++ in Option for Target. The other is to install
Addon directly. Select the installation directory of Keil uVision5 software, such as C:\Keil_v5,
in Destination Folder of Folder Selection. Select the corresponding device in Device of
Option for Target and add “C:\Keil_v5\ARM\Pack\ARM\CMSIS\4.2.0\CMSIS\Include” to

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C/C++ in Option for Target.
3. If you use IAR to open the project, install IAR_GD32F3x0_ADDON.2.0.0.exe to load the
associated files.
4. Hardware layout overview
4.1. Power supply
Figure 4-1 Schematic diagram of power supply
G
1
Vout 2
Vin
34
U2 LM1117-3.3
E1
16V/10uF,AVX
E2
16V/10uF,AVX
GND
C11
50V/0.1uF
+3V3
LED3
LED0603
R9
470Ω
1
TP1
TP +3V3
P1
SMD1210P005TF
+U5V
5
S2
3
S
2
S1
1
4
SW1
SW-SPDT
1
3
2
CN4
DC-10B
GND
VCC
PWR
PWR
4.2. Boot option
Figure 4-2 Schematic diagram of boot option
R7
10KΩ
1
2
3
JP4
BOOT0
GND BOOT0
+3V3
Table 4-1 Boot configuration
BOOT1
BOOT0
Boot Mode
Default
2-3
User memory
1-2
System memory
Changed by ISP
1-2
SRAM memory
4.3. LED
Figure 4-3 Schematic diagram of LED function
PA1LED1
LED0603
LED
R2
470ΩGND

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4.4. KEY
Figure 4-4 Schematic diagram of Key function
PA0
R1
10KΩ
+3V3
GND
C1
50V/0.01uF
KEY
K1
K-1102B
4.5. USBFS
Figure 4-5 Schematic diagram of USBFS function
GND
R54
47KΩ
R55
470R
PB3
E10
16V/10uF,AVX
GND
PA11
PA12
1
2
3
Q3
S8550
R10
1MΩ
C12
50V/4700pF
PWR
USB_VBUS
USB_DM
USB_DP
VBUS
1
DM
2
DP
3
ID
4
GND
5
Shield
6
USB_MiniAB receptacle
CN1
Mini_USB
+U5V
PA9R11
22ΩR12
22Ω

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4.6. GD-Link
Figure 4-6 Schematic diagram of GD-Link function
L_USB_Ctr
C100
50V/20pF
C102
50V/20pF
Y101
HC-49S-8MHz
GND
L_NRST
+3V3
GND
R102
10KΩ
C103
50V/0.1uF
R104
10KΩ
GND
C105
50V/0.1uF
C106
50V/0.1uF
C107
50V/0.1uF
C108
50V/0.1uF
R101
1MΩ
L_OSC_IN
L_OSC_OUTL_OSC_IN
L_OSC_OUT L_NRST
GND
+3V3
GND
1
2
3
4
JP100
4×1P2.54
+3V3
GND
MCU SWD
HSE
Reset
L_TMS/IO
L_TDI
L_TDO/SWO
L_TCK/CLK
L_USB_DP
L_SWDIO
L_SWDCK
L_SWDIO
L_SWDCK
+3V3
L_USB_DM
BOOT0
44
NRST
7
OSC_IN/PD0
5
OSC_OUT/PD1
6
PA0-WKUP
10
PA1
11
PA2
12
PA3
13
PA4
14
PA5
15
PA6
16
PA7
17
PA8
29
PA9
30
PA10
31
PA11
32
PA12
33
PA13/JTMS/SWDIO
34
PA14/JTCK/SWCLK
37
PA15/JTDI
38
PB018
PB119
PB2/BOOT1 20
PB3/JTDO 39
PB4/JNTRST 40
PB541
PB642
PB743
PB845
PB946
PB10 21
PB11 22
PB12 25
PB13 26
PB14 27
PB15 28
PC13-TAMPER-RTC 2
PC14-OSC32_IN 3
PC15-OSC32_OUT 4
VBAT
1
VDD_1
24
VDD_2
36
VDD_3
48
VDDA
9
VSS_1 23
VSS_2 35
VSS_3 47
VSSA 8
U0
GD32F103C8T6
L_TReset
L_LED1
L_LED2
L_LED1 LED0603
L_LED2 LED0603
R109 1KΩ
R110 1KΩGND
GND
R105 22R
R106 22R
R108
1MΩC104
50V/4700pF
L_USB_DM
L_USB_DP
GND
R107 1.5KΩL_USB_Ctr
VCC 1
D- 2
D+ 3
ID 4
GND 5
SHELL 6
CN100
Mini_USB
4.7. Extension
Figure 4-7 Schematic diagram of Extension Pin
Extension Pin
PA4
PA5
PA6
PA7
PA1
PB1
PB0
PA3
PA2
PB5
PB6
PB7
PA9
PA10
PA15
PB3
PB4
PA01
2
3
4
5
6
7
8
9
10
11
JP1
HEADER 11
1
2
3
4
5
6
7
8
9
10
11
JP2
HEADER 11
+3V3
GND
GND
GND

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4.8. MCU
Figure 4-8 Schematic diagram of MCU Pin
PA4
PA5
PA6
PA7
PA0
PA1
PA3
PA2
PA11
PA12
PA9
PA10
PB5
PB6
PB7
PB1
PB0
BOOT0
GND
NRST
PA13
PA14
PA15
PB3
PB4
SWCLK
SWDAT
OSC_IN
OSC_OUT
+3V3
BOOT0
1
NRST
4
OSC_IN/PF0
2
OSC_OUT/PF1
3
PA06
PA17
PA10 18
PA11 19
PA12 20
PA13/SWDIO 21
PA14/SWCLK 22
PA15 23
PA28
PA39
PA410
PA511
PA612
PA713
PA917
PB0
14
PB1
15
PB3
24
PB4
25
PB5
26
PB6
27
PB7
28
VDD
16
VDDA
5
VSS/VSSA 29
U1
GD32F350G8U6
5. Routine use guide
5.1. GPIO_Running_Led
5.1.1. DEMO purpose
This Demo includes the following functions of GD32 MCU:
Learn to use GPIO for controlling the LED
Learn to use SysTick to generate 1ms delay
GD32350G-START board has one LED. The LED1 is controlled by GPIO. This demo will
show how to light the LED.
5.1.2. DEMO running Result
Download the program <01_GPIO_Running_Led> to the board, the state of LED1 is toggled
every 1s.
5.2. GPIO_Key_Polling_mode
5.2.1. DEMO purpose
This Demo includes the following functions of GD32 MCU:
Learn to use GPIO control the LED and the KEY

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Learn to use SysTick to generate 1ms delay
GD32350G-START board has two keys and one LED. The two keys are Reset key and User
key. The LED1 is controlled by GPIO.
This demo will show how to use the User key to control the LED1. When press down the
User Key, it will check the input value of the IO port. If the value is 1, wait for 50ms. Then
check the input value of the IO port again. If the value is still 1, indicates that the button is
pressed down successfully, and light the LED1.
5.2.2. DEMO running Result
Download the program <02_GPIO_Key_Polling_mode> to the board, first of all, all the LEDs
will be flashed once for test. Then press down the User Key, LED1 will be turned on. Press
down the User Key again, LED1 will be turned off.
5.3. EXTI_Key_Interrupt_mode
5.3.1. DEMO purpose
This Demo includes the following functions of GD32 MCU:
Learn to use GPIO to control the LED and the KEY
Learn to use EXTI to generate external interrupt
GD32350G-START board has two keys and one LED. The two keys are Reset key and User
key. The LED1 is controlled by GPIO.
This demo will show how to use EXTI interrupt line to control the LED1. When press down
the User Key, it will produce an interrupt. In the interrupt service function, the demo will
toggle LED1.
5.3.2. DEMO running Result
Download the program <03_EXTI_Key_Interrupt_mode> to the board, first of all, all the
LEDs will be flashed once for test. Then press down the User Key, LED1 will be turned on.
Press down the User Key again, LED1 will be turned off.
5.4. USB_FS
5.4.1. USBD_CDC_ACM
DEMO purpose
This demo includes the following functions of GD32 MCU:

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Learn how to use the USBFS peripheral
Learn how to implement USB CDC device
Start board has one USBFS interface. In this demo, the Start board is enumerated as an
USB virtual COM port, which would be shown in device manager of PC as below. This demo
makes the USB device looks like a serial port, and loops back the contents of a text file over
USB port. To run the demo, input a message using the PC's keyboard. Any data that shows
in HyperTerminal is received from the device.
DEMO running Result
Download the program <04_USBFS\Device\CDC_ACM> to the Start board and run. When
you input message through computer keyboard, the HyperTerminal will receive and shown
the message. For example, when you input “GigaDevice MCU”, the HyperTerminal will get
the message and show it as below.
5.4.2. USBH_MSC_Host
DEMO purpose
This demo includes the following functions of GD32 MCU:
Learn to use the USBFS as a MSC host
Learn the operation between the MSC host and the Udisk
Start board integrates the USBFS module, and the module can be used as USBFS device, a
USBFS host or OTG device. This demo mainly shows how to use the USBFS as a USB MSC
host to communicate with external Udisk.

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DEMO running Result
Insert the OTG cable to the USB port, download the program <04_USBFS\Host\MSC> to the
Start board and run.
If an Udisk has been attached, firstly, press the user key, then this demo will write file to the
Udisk. After a while, the file would has been written in Udisk, the MSC host demo is end and
the LED1 will be on.

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6. Revision history
Table 6-1 Revision history
Revision No.
Description
Date
1.0
Initial Release
Jun.28, 2017
2.0
Updated format across the whole document
Jun.1, 2019

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