Nuvoton NuMicro NUC126 Series User manual

NuMaker-emWin-NUC126
Apr, 26, 2021 Page 1of 40 Rev 1.02
NuMaker-emWin-NUC126 USER MANUAL
Maker Nu-mbed NUC472 User Manual
NuMicro® Family
Arm®Cortex®-M0
NuMaker-emWin-NUC126
User Manual
Evaluation Board for NuMicro®NUC126 Series
The information described in this document is the exclusive intellectual property of
Nuvoton Technology Corporation and shall not be reproduced without permission from Nuvoton.
Nuvoton is providing this document only for reference purposes of NuMicro microcontroller based system
design. Nuvoton assumes no responsibility for errors or omissions.
All data and specifications are subject to change without notice.
For additional information or questions, please contact: Nuvoton Technology Corporation.
www.nuvoton.com

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Table of Contents
1Overview.................................................................................... 6
2Features .................................................................................... 8
NuMaker-PFM-NUC126 Main Board Features......................................... 8
NuTFT Extension Board Features ....................................................... 8
Supporting Resources..................................................................... 8
3NuMaker-PFM-NUC126 Main Board................................................... 9
NuMaker-PFM-NUC126 Main Board Overview......................................... 9
Pin Assignment for Extended Connectors .............................................10
Arduino UNO Compatible Interface .....................................................13
System Configuration.....................................................................15
3.4.1 System Power Configure .......................................................................... 15
3.4.2 5V Power Source ................................................................................... 15
3.4.3 3.3V Power Source................................................................................. 16
3.4.4 USB Connectors .................................................................................... 16
3.4.5 Arduino UNO Compatible Interface Connectors............................................... 16
3.4.6 Extended Connectors .............................................................................. 16
3.4.7 Push-Buttons ........................................................................................ 16
3.4.8 LEDs.................................................................................................. 16
3.4.9 Power Connectors.................................................................................. 16
Nu-Link-Me.................................................................................17
PCB Placement of NuMaker-PFM-NUC126 Main Board.............................18
4NuTFT Extension Board ............................................................... 19
NuTFT Extension Board Overview......................................................19
Pin Assignment for NuTFT Extension Board ..........................................21
System Configuration.....................................................................23
4.3.1 Arduino UNO Compatible Interface Connectors............................................... 23
4.3.2 Push-Buttons ........................................................................................ 23
4.3.3 Five-Direction Joystick............................................................................. 23
4.3.4 TFT LCD panel...................................................................................... 23
4.3.5 Four-Wire ADC Touch Panel ..................................................................... 23
PCB Placement of NuTFT Extension Board...........................................24
5NuMaker-PFM-NUC126 Main Board Schematics ................................. 25
Nu-Link-Me.................................................................................25

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NUC126VG4AE Pin Assignment........................................................26
Power Circuit...............................................................................27
Arduino UNO Compatible Interface .....................................................28
Reset Circuit ...............................................................................29
External Crystal Circuit ...................................................................30
LED Circuit .................................................................................31
MCU I/O Connector .......................................................................32
USB Port....................................................................................33
ICE Interface Circuit.......................................................................34
6NuTFT Extension Board Schematics ................................................ 35
Interface Connector .......................................................................35
SPI Flash Circuit...........................................................................36
TFT LCD Circuit ...........................................................................37
Button Circuit...............................................................................38
7REVISION HISTORY................................................................... 39

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List of Figures
Figure 1-1 NuMaker-emWin-NUC126 Evaluation Board................................................................. 6
Figure 1-2 NuMaker-PFM-NUC126 Main Board.............................................................................. 7
Figure 1-3 NuTFT Extension Board................................................................................................. 7
Figure 3-1 Front View of NuMaker-PFM-NUC126 Main Board ....................................................... 9
Figure 3-2 NuMaker-PFM- NUC126 Main Board Extended Connectors....................................... 10
Figure 3-3 Arduino UNO Compatible Interface.............................................................................. 13
Figure 3-4 NuMaker-PFM-NUC126 Main Board Placement - Front View..................................... 18
Figure 3-5 NuMaker-PFM-NUC126 Main Board Placement - Rear View...................................... 18
Figure 4-1 Front View of NuTFT Extension Board......................................................................... 19
Figure 4-2 Rear View of NuTFT Extension Board ......................................................................... 20
Figure 4-3 NuTFT Extension Board Connectors............................................................................ 21
Figure 4-4 NuTFT Extension Board Placement - Front View ........................................................ 24
Figure 4-5 NuTFT Extension Board Placement - Back View......................................................... 24
Figure 5-1 Nu-Link-Me Circuit........................................................................................................ 25
Figure 5-2 NUC126VG4AE Pin Assignment.................................................................................. 26
Figure 5-3 Power Circuit and Configurations................................................................................. 27
Figure 5-4 Arduino UNO Compatible Interface.............................................................................. 28
Figure 5-5 Reset Circuit ................................................................................................................. 29
Figure 5-6 External Crystal Circuit................................................................................................. 30
Figure 5-7 Power LED and IO LED Circuit .................................................................................... 31
Figure 5-8 MCU I/O connector Circuit............................................................................................ 32
Figure 5-9 USB Circuit ................................................................................................................... 33
Figure 5-10 ICE Interface Circuit.................................................................................................... 34
Figure 6-1 Interface Connector Circuit........................................................................................... 35
Figure 6-2 SPI Flash circuit............................................................................................................ 36
Figure 6-3 TFT LCD Circuit............................................................................................................ 37
Figure 6-4 Button Circuit ................................................................................................................ 38

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List of Tables
Table 3-1 Extended Connector JP7 and JP9 Interface with NUC126VG4AE GPIO..................... 11
Table 3-2 Extended Connector JP10 and JP8 Interface with NUC126VG4AE GPIO................... 12
Table 3-3 Arduino UNO Extension Connectors and NUC126VG4AE Mapping GPIO List ........... 14
Table 4-1 Arduino UNO Extension Connectors and NuTFT Mapping GPIO List .......................... 22

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1 OVERVIEW
The NuMaker-emWin-NUC126 is an evaluation board for GUI application development on emWin
library. The NuMaker-emWin- NUC126 consists of two parts: a NuMaker-PFM-NUC126 main board and
a NuTFT extension board. The NuMaker-emWin-NUC126 is designed for emWin project evaluation,
prototype development and validation.
The NuMaker-PFM-NUC126 consists of two parts: an NUC126 target board and an on-board Nu-Link2-
Me debugger and programmer. The NUC126 target board is based on NuMicro NUC126VG4AE. For
the development flexibility, the NUC126 target board provides the extension connectors of
NUC126VG4AE, the Arduino UNO compatible headers and the capability of adopting multiple power
supplies.
In addition, there is an attached on-board debugger and programmer “Nu-Link-Me”. The Nu-Link-Me
supports on-chip debugging and online ICP programming via SWD interface. It supports drag-and-drop
programming: programming the MCU by dragging the firmware image file into the Nu-Link-Me storage
on PC. Besides, the programming status could be shown on the built-in LEDs. Lastly, the Nu-Link-Me
could be detached from the evaluation board and become a stand-alone mass production programmer.
The NuTFT can be plugged into the main board via the Arduino UNO extension connector. The NuTFT
is equipped with one SPI Flash, one ILI9341 2.4” SPI TFT LCD touch panel, one five-direction joystick
and two push buttons.
Figure 1-1 NuMaker-emWin-NUC126 Evaluation Board

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Figure 1-2 NuMaker-PFM-NUC126 Main Board
Figure 1-3 NuTFT Extension Board

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2 FEATURES
NuMaker-PFM-NUC126 Main Board Features
⚫Use NUC126VG4AE as main microcontroller
⚫NUC126VG4AE full pins extension connectors
⚫Arduino UNO compatible extension connectors
⚫Fixable board power supply:
◆Power Jack
◆External VDD power connector
◆Arduino UNO compatible extension connector Vin
◆USB connector on NUC126 platform
◆ICE USB connector on Nu-Link-Me
⚫On-board Nu-Link-Me debugger and programmer:
◆Debug through SWD interface
◆On-line programming
◆Virtual COM port function
NuTFT Extension Board Features
⚫16 Mbits (2 MB) SPI Flash (W25Q16CV)
⚫ILI9341 2.4” (320x240) SPI TFT LCD Panel with 4-Wire ADC Touch Function
⚫Five-direction Joystick
⚫Two Push Buttons
⚫Arduino UNO Compatible Extension Connectors
Supporting Resources
For sample codes and introduction about emWin library, please refer to NUC126 BSP:
https://www.nuvoton.com/resource-download.jsp?tp_GUID=SW1820210201134056
Visit NuForum for further discussion about the NuMaker-emWin-NUC126:
http://forum.nuvoton.com/viewforum.php?f=31
Segger provides an emWin supporting forum. Questions regarding emWin usage are discussed at:
https://forum.segger.com/index.php/Board/12-emWin-related/

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3 NUMAKER-PFM-NUC126 MAIN BOARD
NuMaker-PFM-NUC126 Main Board Overview
Figure 3-1 shows the main components and connectors of NuMaker-PFM-NUC126 main board.
The following lists components and connectors:
➢Nu-Link-Me V1.2 (ICE debugger):
⚫ICE Controller NUC12SRE3DE (ICE_U2)
⚫USB connector (ICEJ1) to PC Host
⚫ICE power selector (JPR1) VCC 3.3V / 5V
➢NuMaker-PFM-NUC126:
⚫Target Chip: NUC126VG4AE (U1)
⚫Extended Interface Connectors (JP7, JP8, JP9 and JP10)
⚫USB Connector (J2)
⚫LEDs (P_LED1 and IO_LED1)
⚫Power Jack (CON1)
⚫Reset Key (SW1)
⚫Arduino UNO Compatible Interface Connectors (NU1, NU2, NU5, NU6 and NU7)
Reset Key
ICE Controller
VCC 3.3V/5V
ICE USB Connector
Power Jack
USB Connector
Target Chip
NUC126
Extended Connector
Extended Connector Arduino compatible
interface connectors Power LED and IO LED
Arduino compatible
interface connectors
Arduino compatible
interface connectors
Figure 3-1 Front View of NuMaker-PFM-NUC126 Main Board

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Pin Assignment for Extended Connectors
The NuMaker-PFM-NUC126 main board is equipped with the target chip, NUC126VG4AE and extended
connectors (JP7, JP8, JP9 and JP10) for LQFP100-pin. Figure 3-2 shows the NUC126VG4AE extended
connectors.
JP9 : Pin1 ~ Pin25 JP7 : Pin76 ~ Pin100
JP10 : Pin51 ~ Pin75JP8 : Pin26 ~ Pin50
Figure 3-2 NuMaker-PFM- NUC126 Main Board Extended Connectors

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Header
NUC126VG4AE
Header
NUC126VG4AE
Pin No.
Function
Pin No
Function
JP7
76
PF.7
JP7
89
AVDD
77
USB_VDD33_CAP
90
VREF
78
PB.12
91
PB.0
79
PA.3
92
PB.1
80
PA.2
93
PB.2
81
PA.1
94
PB.3
82
PA.0
95
PB.4
83
PA.12
96
PB.8
84
PA.13
97
PB.9
85
PA.14
98
PB.10
86
PA.15
99
PB.11
87
VSS
100
PE.2
88
VDD
-
-
JP9
1
PB.13
JP9
14
PD.9
2
PB.14
15
PD.1
3
PB.15
16
PD.2
4
PB.5
17
PD.3
5
PB.6
18
PD.4
6
PB.7
19
PD.5
7
nRESET
20
PE.3
8
PD.0
21
PD.6
9
AVSS
22
VBAT
10
VDD
23
PF.0
11
VSS
24
PF.1
12
PC.8
25
PF.2
13
PD.8
-
-
Table 3-1 Extended Connector JP7 and JP9 Interface with NUC126VG4AE GPIO

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Header
NUC126VG4AE
Header
NUC126VG4AE
Pin No.
Function
Pin No
Function
JP10
51
PC.6
JP10
64
VDD
52
PC.7
65
PE.1
53
PE.4
66
PE.8
54
PE.5
67
PE.9
55
ICE_CLK
68
PE.10
56
ICE_DAT
69
PE.11
57
PA.8
70
PE.12
58
PA.9
71
PE.13
59
PA.7
72
VDDIO
60
PA.6
73
USB_VBUS
61
PA.5
74
USB_D-
62
PA.4
75
USB_D+
63
VSS
-
-
JP8
26
PD.10
JP8
39
PC.10
27
PD.11
40
PC.11
28
PD.12
41
PC.12
29
PD.13
42
PC.13
30
PD.14
43
PC.14
31
PD.15
44
PC.0
32
PD.7
45
PC.1
33
PF.3
46
PC.2
34
PF.4
47
PC.3
35
VSS
48
PC.4
36
VDD
49
PE.0
37
LDO_CAP
50
PC.5
38
PC.9
-
-
Table 3-2 Extended Connector JP10 and JP8 Interface with NUC126VG4AE GPIO

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Arduino UNO Compatible Interface
Figure 3-3 shows the Arduino UNO compatible interface.
SPI1_SS RESET SPI1_CLK SPI1_MISO
NC
VCC
MCU_RESET
3VCC
5VCC
VSS
VSS
VIN
A0
A1
A2
A3
A4
A5
I2C1_SCL
I2C1_DAT
VREF
VSS
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
PD5
PD4
VREF
VSS
PE13
PE10
PE11
PE12
PA9
PA8
PC14
PC13
PC12
PC11
PC10
PC9
PD1
PD6
NC
VCC
MCU_RESET
3VCC
5VCC
VSS
VSS
VIN
PB9
PB10
PB11
PE2
PB13
PB14
GPIO GND SPI1_MOSI VCC
Figure 3-3 Arduino UNO Compatible Interface

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Header
NuMaker-PFM-NUC126
Header
NuMaker-PFM-NUC126
Compatible to
Arduino UNO
GPIO Pin of NUC126
Compatible to
Arduino UNO
GPIO Pin of NUC126
N
U
7
NU7.8
GPIO
PB.12
N
U
7
NU7.4
SPI0_SS
PD.12
NU7.7
GND
GND
NU7.3
RESET
RESET
NU7.6
SPI0_MOSI
PD.13
NU7.2
SPI0_CLK
PD.15
NU7.5
VCC
VCC
NU7.1
SPI0_MISO
PD.14
N
U
5
NU3.1
D0
PD.6
N
U
2
NU2.6
A5
PB.14
NU3.2
D1
PD.1
NU2.5
A4
PB.13
NU3.3
D2
PC.9
NU2.4
A3
PE.2
NU3.4
D3
PC.10
NU2.3
A2
PB.11
NU3.5
D4
PC.11
NU2.2
A1
PB.10
NU3.6
D5
PC.12
NU2.1
A0
PB.9
NU3.7
D6
PC.13
N
U
1
NU1.8
VIN
-
NU3.8
D7
PC.14
NU1.7
GND
N
U
6
NU4.1
D8
PA.8
NU1.6
GND
NU4.2
D9
PA.9
NU1.5
5VCC
NU4.3
D10
PE.12
NU1.4
3VCC
NU4.4
D11
PE.11
NU1.3
RESET
nRESET
NU4.5
D12
PE.10
NU1.2
IOREF
-
NU4.6
D13
PE.13
NU1.1
NC
NU4.7
VSS
VSS
NU4.8
VREF
VREF
NU4.9
SDA
PD.4
NU4.10
SCL
PD.5
Table 3-3 Arduino UNO Extension Connectors and NUC126VG4AE Mapping GPIO List

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System Configuration
3.4.1 System Power Configure
There are six pins in JP6 and two power modes can be selected.
Mode 1: Using jumper to short VCC and ICE_VCC.
VCC
USB5V
VCC
ICE_VCC
VCC
VIN
In mode 1, power source comes from J1 or CON2. User can plug the USB connector into J1 or CON2
to supply the power for NuMaker-PFM-NUC126 main board.
Mode 2: Using jumper to short VCC and VIN.
VCC
USB5V
VCC
ICE_VCC
VCC
VIN
In mode 2, power source comes from CON1. User can plug the adaptor connector into CON1 to supply
the power for NuMaker-PFM-NUC126 main board.
Note: There is no function when short VCC to USB5V, because the component, diode D2 is not place
on NuMaker-PFM-NUC126 main board.
3.4.2 5V Power Source
⚫J1 (ICE):
(1). Short the VCC to ICE_VCC on JP6
(2). Short the ICE_VCC to 5VCC on JPR1.
(3). Plug the USB connector into J1 to supply 5V power from PC host for NuMaker-PFM-
NUC126 main board.
⚫CON2:
(1). Short the VCC to ICE_VCC on JP6.
(2). Plug the USB connector into CON2 to supply 5V power from PC host for NuMaker-
PFM-NUC126 main board.
⚫CON1(Power Jack):
(1). Short the VCC to VIN on JP6.
(2). Plug the adaptor connector into CON1 to supply the power for NuMaker-PFM-NUC126
main board.
Note: Please do not short the ICE_VCC to 5VCC on JPR1 when you use NuTFT.
The power of NuTFT comes from 3VCC and LCD panel is sourced by 3VCC. If user shorts the ICE_VCC
to 5VCC on JPR1, the MCU will operate in 5V power domain. Hence, there is a short path between
3VCC and 5VCC from LCD panel to MCU. It will generate huge current in LCD panel and make its
temperature increased quickly. Finally, the LCD panel will be chromatic polarization because of high
temperature.

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3.4.3 3.3V Power Source
⚫J1 (ICE):
(1) Short the VCC to ICE_VCC on JP6
(2) Short the ICE_VCC to 5VCC on JPR1.
(3) Plug the USB connector into J1 to supply 5V power from PC host for NuMaker-PFM-
NUC126 main board.
⚫CON2:
(1) Short the VCC to ICE_VCC on JP6.
(2) Plug the USB connector into CON2 to supply 5V power from PC host for NuMaker-
PFM-NUC126 main board.
3.4.4 USB Connectors
⚫J1 (ICE): Connect the USB connector (J1) to USB port of PC to program code, debug and
supply power.
⚫CON2: USB connector on NuMaker-PFM-NUC126 main board for USB application.
3.4.5 Arduino UNO Compatible Interface Connectors
⚫NU1, NU2, NU5, NU6 and NU7: Arduino UNO compatible pins on the NuMaker-PFM-
NUC126 main board.
3.4.6 Extended Connectors
⚫JP7, JP8, JP9 and JP10:Extended connectors interface pins on the NuMaker-PFM-
NUC126 main board.
3.4.7 Push-Buttons
⚫SW1: Reset button to reset the target chip on NuMaker-PFM-NUC126 main board.
3.4.8 LEDs
⚫POWER: The power LED indicates that the NuMaker-PFM-NUC126 main board is
powered.
⚫IO_LED1: Only for application.
3.4.9 Power Connectors
⚫CON1: Power Jack connector on the NuMaker-PFM-NUC126 main board.
⚫VCC1: VCC connector on NuMaker-PFM-NUC126 main board
⚫GND1: GND connector on NuMaker-PFM-NUC126 main board

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Nu-Link-Me
The NuMaker-PFM-NUC126 features a Nu-Link-Me ICE debugger and programmer. The Nu-Link-Me
supports on-chip debugging and online ICP programming via SWD interface. It also supports drag-and-
drop programming: programming the MCU by dragging the firmware image file into the Nu-Link-Me
storage on PC. Besides, the programming status could be shown on the built-in LEDs. Lastly, the Nu-
Link-Me could be detached from the evaluation board and become a stand-alone mass production
programmer.

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PCB Placement of NuMaker-PFM-NUC126 Main Board
Figure 3-4 and Figure 3-5 show the front and rear view placement of NuMaker-PFM-NUC126 main
board.
Figure 3-4 NuMaker-PFM-NUC126 Main Board Placement - Front View
Figure 3-5 NuMaker-PFM-NUC126 Main Board Placement - Rear View

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4 NUTFT EXTENSION BOARD
NuTFT Extension Board Overview
Figure 4-1 and Figure 4-2 show the main components and connectors of NuTFT extension board.
The following lists components and connectors:
➢Front View of NuTFT Extension Board:
⚫Five-direction Joystick (J3)
⚫Switch Button (SW7 and SW8)
⚫ILI9341 2.4” 320x240 SPI TFT LCD Panel with 4-Wire ADC Touch Function (J7)
⚫Arduino Compatible Interface Connectors (NU1, NU2, NU5 and NU6)
Five
Direction
Joystick
Switch Button
TFT LCD and Touch screen
Arduino compatible
interface connectors
Arduino compatible
interface connectors
Figure 4-1 Front View of NuTFT Extension Board

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➢Rear View of NuTFT Extension Board:
⚫16 Mbits (2 MB) SPI Flash * 1 (W25Q16CV) (U1)
⚫Arduino Compatible Interface Connectors (NU1, NU2, NU5, NU6 and NU7)
SPI Flash
Arduino compatible
interface connectors
Arduino compatible
interface connectors
Arduino compatible
interface connectors
Figure 4-2 Rear View of NuTFT Extension Board