1 2 3 4 5 6 7 8

+24V +24V VBUS

VCC
U4
Power
1 VIN VIN
D8 D2 VCC
A 2 A
SS24 SS24 R1 R2
10k 10k
U5 R17 R18 R27
C6 C7 MP9942GJ 10k 10k 10k U7
C10
GND R12 SW2

2
R31 C C R13 10nF RotaryEncoder_Switch

IN
523k VCC SW2 CH ROT_PUSH
47k 20
6 5 L1 SW1 R20 10k
EN/SYNC BST
VIN_MON 2.2uH A S1
GND D7 SW1 SET ROT_A
1 3 C
R36 C26 Z PG SW
B S2
4.7k C R8 100k C9 ROT_B
C1 C2

GND
7 8 R19
VCC FB C C C
R9 R10 10k
C5 R7

4
C 51k 20k 51k

GND C15 C16 C19

C C C
GND
GND GND

B B
+24V
VCC
VCC

VCC
R11 R6
R30
1k 10k

1
2
3
10k
Q1 C1 R14 Q3
LCD_LED 1 4
NTC PNP C AO4413

3
330
Q4

5
6
7
8
5
C11 C12 C13 C14 C25 RT1 HEATER +
1 Q_NPN_BEC 4
C C C C C NTC -
GND

2
R15 3

1
3
R21 GND ID
330 2

VCC
LEDA
10 T
R16 1
4 S (T12 shake sensor)
0 LCD_RST ~{RST}
GND GX12-5
C17 C18 GND LCD_DB DB0 9 5
VCC DB0 ~{CS} LCD_CS P4
C C DB1 10 6 VCC GND
DB1 RS LCD_RS
32
48
64
19
13
1

DB2 11 7
DB2 WE LCD_WE
VDD_1
VDD_2
VDD_3
VDD_4
VDDA
VBAT

DB3 12 8
10k DB3 RD LCD_RD
C DB4 13 R23 C
R25 GND DB4
DB5 14 4.7k D4
DB5
7 14 DB6 15
NRST PA0/WKUP TEMP DB6 D
60 15 DB7 16
C20 BOOT0 PA1 NTC DB7
16 DB8 ID
R28 PA2 VIN_MON 17
C DB8
17 DB9 18
GND 10k PA3 ID DB9 VCC
20 DB10 19
PA4 ROT_A DB10
C21 21 VCC
PA5 LCD_RD DB11 20
C GND DB11
22 DB12 21
PA6 LCD_WE DB12
Crystal

GND/LEDK
5 23 DB13 22
OSCIN/PD0 PA7 LCD_RS DB13 C24
6 41 DB14 23
OSCOUT/PD1 PA8 HEATER C
R24

DB14
1M

Y1 54 42 1 DB15 24 U8
SHAKE PD2 PA9 USBPU DB15
43 D1 BEEP1 Unknown OpAmp R33
PA10
44 D 2 Buzzer GND

5
PA11 USBDM 4.7k
U1
C 45 3

V+
PA12 USBDP R4 MY240H2416S-V2 +
C22 46 1
GND PA13 SWDIO 470 3 TEMP C27
49 4 D6
PA14 Q1 C23 - C

V-
SWCLK
50 BEEP 1 LED
PA15 Q_NPN_BEC C

2
GND
2

DB0 8 26
D LCD_DB PC0/ADC012_IN10 PB0 LCD_CS R29 R35 D
DB1 9 27
PC1/ADC012_IN11 PB1 LCD_RST VBUS 150k 1k
DB2 10 28
PC2/ADC012_IN12 PB2

USBPU
DB3 11 55 1 GND
PC3/ADC012_IN13 PB3 TP under display
DB4 24 56
PC4 PB4
DB5 25 57 A4 GND
PC5 PB5 VBUS
DB6 37 58 VCC
PC6 PB6 BEEP C8
DB7 38 59 A5
PC7 PB7 ~{PORT1} R5 C CC1
DB8 39 61 B5
PC8 PB8 1.5k CC2
DB9 40 62 R22
PC9 PB9 GND
DB10 51 29 A7 4.7k
PC10 PB10 ROT_B USBDM D- D3
DB11 52 30 B7
PC11 PB11 ROT_PUSH D- D
DB12 53 33 A6
PC12 PB12 LCD_LED USBDP D+ SHAKE
DB13 2 34 B6
PC13/TAMPER-RTC PB13 SW2_CH D+
DB14 3 35
PC14/OSC32IN PB14 SW1_SET VCC
DB15 4 36 B10
PC15/OSC32OUT PB15 RX1-
B11
RX1+ U3
VSS_1
VSS_2
VSS_3
VSS_4
VSSA

USB_C_Receptacle R26
A3
VCC TX1- 4.7k D5
A2
TX1+ D
31
47
63
18
12

E U2 PORT1 E
1
GD32F303RCT6 A10 ~{PORT1}
RX2- IN:PORT1 (stand detect)
A11
R34 RX2+
10k
4 B3
TX2-
3 B2
SWDIO P3 TX2+
GND 2
SWCLK Debug

SHIELD
1 A8
SBU1
GND

B8
R37 SBU2
10k
S1
A1

GND Sheet: /
GND File: aixun_t3a.kicad_sch
Title: AIXUN T3A
Size: A3 Date: Rev: 1.2
KiCad E.D.A. kicad 6.0.0 Id: 1/1
F F
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