Nuvoton NuMicro M252 Series User manual

NuMaker-M252KG
July. 08, 2020 Page 1of 49 Rev 1.00
NuMaker-M252KG USER MANUAL
Maker Nu-mbed NUC472 User Manual
ARM®Cortex®-M
32-bit Microcontroller
NuMaker-M252KG
User Manual
NuMicro®M252 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

NuMaker-M252KG
July. 08, 2020 Page 2of 49 Rev 1.00
NuMaker-M252KG USER MANUAL
Maker Nu-mbed NUC472 User Manual
Table of Contents
1Overview.............................................................................................7
2Features .............................................................................................8
3Hardware Configuration...........................................................................9
Front View............................................................................................... 9
Rear View..............................................................................................10
Extension Connectors................................................................................11
3.3.1 Pin Assignment for Extension Connectors................................................................ 11
3.3.2 Arduino UNO Compatible Extension Connectors ....................................................... 17
Power Supply Configuration ........................................................................19
3.4.1 VIN Power Source............................................................................................ 19
3.4.2 5 V Power Sources ........................................................................................... 20
3.4.3 3.3 V Power Sources......................................................................................... 20
3.4.4 1.8V Power Sources ......................................................................................... 20
3.4.5 Power Connectors............................................................................................ 21
3.4.6 USB Connectors .............................................................................................. 21
3.4.7 Power Switches............................................................................................... 21
3.4.8 Power Supply Models........................................................................................ 22
External Reference Voltage Connector ...........................................................25
Voltage Adjustable Interface(VAI) Connector ....................................................25
Battery Voltage (VBAT) Connector ..................................................................25
Ammeter Connector..................................................................................25
Push-Buttons ..........................................................................................26
LEDs....................................................................................................26
Nu-Link2-Me...........................................................................................26
3.11.1 VCOM Switches............................................................................................... 26
3.11.2 Status LEDs ................................................................................................... 27
4Quick Start ........................................................................................ 28
Toolchains Supporting ...............................................................................28
Nuvoton Nu-Link Driver Installation................................................................28
BSP Firmware Download............................................................................30
Hardware Setup.......................................................................................30
Find the Example Project............................................................................32
Execute the Project under Toolchains.............................................................32

NuMaker-M252KG
July. 08, 2020 Page 3of 49 Rev 1.00
NuMaker-M252KG USER MANUAL
Maker Nu-mbed NUC472 User Manual
4.6.1 Keil MDK ....................................................................................................... 32
4.6.2 IAR EWARM................................................................................................... 36
4.6.3 NuEclipse ...................................................................................................... 37
5NuMaker-M252KG Schematics................................................................ 44
Nu-Link2-Me...........................................................................................44
M252 platform.........................................................................................45
Extension Connector.................................................................................46
PCB Placement .......................................................................................47
6REVISION HISTORY............................................................................ 48

NuMaker-M252KG
July. 08, 2020 Page 4of 49 Rev 1.00
NuMaker-M252KG USER MANUAL
Maker Nu-mbed NUC472 User Manual
List of Figures
Figure 1-1 NuMaker-M252KG Board............................................................................................... 7
Figure 3-1 Front View of NuMaker-M252KG ................................................................................... 9
Figure 3-2 Rear View of NuMaker-M252KG.................................................................................. 10
Figure 3-3 M252KG6AE Extension Connectors ............................................................................ 11
Figure 3-4 Arduino UNO Compatible Extension Connectors......................................................... 17
Figure 3-5 External Power Supply Sources on Nu-Link2-Me ........................................................ 22
Figure 3-6 External Power Supply Sources on M252 platform...................................................... 23
Figure 3-7 Separate the Nu-Link2-Me from NuMaker-M252KG.................................................... 24
Figure 3-8 Wiring between Ammeter Connector and Ammeter..................................................... 25
Figure 4-1 Nu-Link USB Driver Installation Setup.......................................................................... 28
Figure 4-2 Nu-Link USB Driver Installation.................................................................................... 29
Figure 4-3 Open VCOM Function .................................................................................................. 30
Figure 4-4 ICE USB Connector...................................................................................................... 30
Figure 4-5 Device Manger.............................................................................................................. 31
Figure 4-6 PuTTY Session Setting................................................................................................. 31
Figure 4-7 Template Project Folder Path....................................................................................... 32
Figure 4-8 Warning Message of “Device not found” ...................................................................... 32
Figure 4-9 Project File Migrate to Version 5 Format...................................................................... 33
Figure 4-10 Debugger Setting in Options Window......................................................................... 33
Figure 4-11 Programming Setting in Options Window................................................................... 34
Figure 4-12 Compile and Download the Project............................................................................ 34
Figure 4-13 Keil MDK Debug Mode............................................................................................... 35
Figure 4-14 Debug Message on Serial Port Terminal Windows.................................................... 35
Figure 4-15 IAR EWARM Window................................................................................................. 36
Figure 4-16 Compile and Download the Project............................................................................ 36
Figure 4-17 IAR EWARM Debug Mode ......................................................................................... 37
Figure 4-18 Debug Message on Serial Port Terminal Windows.................................................... 37
Figure 4-19 Import the Project in NuEclipse .................................................................................. 38
Figure 4-20 Import Projects Windows............................................................................................ 38
Figure 4-21 Open Project Properties Window ............................................................................... 39
Figure 4-22 Project Properties Settings......................................................................................... 39
Figure 4-23 Build Project................................................................................................................ 40
Figure 4-24 Open Debug Configuration......................................................................................... 40
Figure 4-25 Main Tab Configuration .............................................................................................. 41
Figure 4-26 Debugger Tab Configuration ...................................................................................... 41
Figure 4-27 Startup Tab Configuration .......................................................................................... 42

NuMaker-M252KG
July. 08, 2020 Page 5of 49 Rev 1.00
NuMaker-M252KG USER MANUAL
Maker Nu-mbed NUC472 User Manual
Figure 4-28 NuEclipse Debug Mode.............................................................................................. 43
Figure 4-29 Debug Message on Serial Port Terminal Windows.................................................... 43
Figure 5-1 Nu-Link2-Me Circuit...................................................................................................... 44
Figure 5-2 M252 platform Circuit.................................................................................................... 45
Figure 5-3 Extension Connectors Circuit ....................................................................................... 46
Figure 5-4 Front Placement ........................................................................................................... 47
Figure 5-5 Rear Placement............................................................................................................ 47

NuMaker-M252KG
July. 08, 2020 Page 6of 49 Rev 1.00
NuMaker-M252KG USER MANUAL
Maker Nu-mbed NUC472 User Manual
List of Tables
Table 3-1 Extension Connectors.................................................................................................... 11
Table 3-2 M252KG6AE Full-pin Extension Connectors and GPIO Function List.......................... 16
Table 3-3 Arduino UNO Extension Connectors and M252KG6AE Mapping GPIO List ................ 18
Table 3-4 Vin Power Source.......................................................................................................... 19
Table 3-5 5V Power Sources......................................................................................................... 20
Table 3-6 3.3 V Power Sources..................................................................................................... 20
Table 3-7 1.8V Power Sources...................................................................................................... 20
Table 3-8 Power Connectors ......................................................................................................... 21
Table 3-9 USB Connectors ............................................................................................................ 21
Table 3-10 Power Switches ........................................................................................................... 21
Table 3-11 Supply External Power through Nu-Link2-Me ............................................................. 22
Table 3-12 Supply External Power for M252 platform................................................................... 24
Table 3-13 External Reference Voltage Connector....................................................................... 25
Table 3-14 Voltage Adjustable Interface Connector...................................................................... 25
Table 3-15 Battery Voltage Interface Connector............................................................................ 25
Table 3-16 Ammeter Connector..................................................................................................... 25
Table 3-17 Push-Buttons ............................................................................................................... 26
Table 3-18 LEDs ............................................................................................................................ 26
Table 3-19 VCOM Function of Nu-Link2-Me.................................................................................. 26
Table 3-20 Operation Status LED Patterns ................................................................................... 27

NuMaker-M252KG
July. 08, 2020 Page 7of 49 Rev 1.00
NuMaker-M252KG USER MANUAL
Maker Nu-mbed NUC472 User Manual
1 OVERVIEW
The NuMaker-M252KG is a development board for Nuvoton NuMicro®M252 microcontrollers. The
NuMaker-M252KG consists of two parts: a M252 platform and an on-board Nu-Link2-Me debugger
and programmer. The NuMaker-M252KG is designed for project evaluation, prototype development
and validation with power consumption monitoring function.
The M252 platform is based on NuMicro®M252KG6AE. For the development flexibility, the M252
platform provides the extension connectors of M252KG6AE, the Arduino UNO compatible headers
and able to adopt multiple power supply. Furthermore, the Nuvoton-designed ammeter connector can
measure the power consumption instantly, which is essential for the prototype evaluation.
In addition to the M252 platform, there is an attached on-board debugger and programmer “Nu-Link2-
Me”. The Nu-Link2-Me supports on-chip debugging, online and offline ICP programming via SWD
interface. The Nu-Link2-Me supports virtual COM (VCOM) port for printing debug messages on PC.
Besides, the programming status could be shown on the built-in LEDs. Lastly, the Nu-Link2-Me could
be detached from the development board and becoming a stand-alone mass production programmer.
Figure 1-1 NuMaker-M252KG Board

NuMaker-M252KG
July. 08, 2020 Page 8of 49 Rev 1.00
NuMaker-M252KG USER MANUAL
Maker Nu-mbed NUC472 User Manual
2 FEATURES
NuMicro®M252KG6AE microcontroller with function compatible with:
M252SG6AE
M252LG6AE
M252KG6AE extension connectors
Arduino UNO compatible extension connectors
Ammeter connector for measuring the microcontroller’s power consumption
Fixable board power supply:
External VDD power connector
Arduino UNO compatible extension connector Vin
USB FS connector on M252 platform
ICE USB connector on Nu-Link2-Me
On-board Nu-Link2-Me debugger and programmer:
Debug through SWD interface
On-line/off-line programming
Virtual COM port function

NuMaker-M252KG
July. 08, 2020 Page 9of 49 Rev 1.00
NuMaker-M252KG USER MANUAL
Maker Nu-mbed NUC472 User Manual
3 HARDWARE CONFIGURATION
Front View
ICE USB Connector
VCOM Switch
Reset Button
ICE Status LED
Off-line Program Button
USB FS Connector
Power LED
PB14 LED
VDD Switch
Target Chip: M252KG6AE Target Chip Extension Connector
Arduino UNO Compatible Extension
Connector
External VDD Connector
Nu-Link2-Me
Ammeter
ICE Chip: M48SSIDAE
External VSS Connector
M252 Platform
External VREF Connector
Figure 3-1 Front View of NuMaker-M252KG
Figure 3-1 shows the main components and connectors from the front side of NuMaker-M252KG. The
following lists components and connectors from the front view:
Target Chip: M252KG6AE(U1)
USB FS Connector(J2)
Arduino UNO Compatible Extension Connectors (NU1, NU2, NU3, NU4)
M252 Extension Connectors (JP3, JP4, JP5 and JP6)
External VDD Power Connector(JP1)
External VSS Power Connector(JP2)
External VREF Connector(VREF1)
VDD Switch(SW2)
Ammeter Connector(AMMETER)
Reset Button(SW1)
Power LED and PB14 LED(LEDG1 and LEDR1)
Nu-Link2-Me
VCOM Switch
ICE Chip: M48SSIDAE(ICEU2)
ICE USB Connector(ICEJ3)
ICE Status LED(ICES0,ICES1, ICES2, ICES3)
Off-line Program Button(ICESW1)

NuMaker-M252KG
July. 08, 2020 Page 10 of 49 Rev 1.00
NuMaker-M252KG USER MANUAL
Maker Nu-mbed NUC472 User Manual
Rear View
Figure 3-2 shows the main components and connectors from the rear side of NuMaker-M252KG.
The following lists components and connectors from the rear view:
Nu-Link2-Me
MCUVCC Power Switch (ICEJPR1)
ICEVCC Power Switch (ICEJPR2)
ICEVCC Power Switch
MCUVCC Power
Switch
Figure 3-2 Rear View of NuMaker-M252KG

NuMaker-M252KG
July. 08, 2020 Page 11 of 49 Rev 1.00
NuMaker-M252KG USER MANUAL
Maker Nu-mbed NUC472 User Manual
Extension Connectors
Table 3-1 presents the extension connectors.
Connector
Description
JP3, JP4, JP5 and JP6
Full pins extension connectors on the NuMaker-M252KG.
NU1, NU2, NU3 and NU4
Arduino UNO compatible pins on the NuMaker-M252KG.
Table 3-1 Extension Connectors
3.3.1 Pin Assignment for Extension Connectors
The NuMaker-M252KG provides the M252KG6AE target chip onboard and full pins extension
connectors (JP3, JP4, JP5 and JP6). The Figure 3-3 shows the M252KG6AE extension connectors.
JP3
Pin1 ~ Pin16
JP6
Pin49 ~ Pin64
JP5 Pin17 ~ Pin32
JP4 Pin33 ~ Pin48
NuMaker-RoLaD-M252 V1.1
Figure 3-3 M252KG6AE Extension Connectors

NuMaker-M252KG
July. 08, 2020 Page 12 of 49 Rev 1.00
NuMaker-M252KG USER MANUAL
Maker Nu-mbed NUC472 User Manual
Header
M252KG6AE
Pin No.
Function
JP3
JP3.1
1
PB.5/EADC0_CH5/ACMP1_N/EBI_ADR0/I2C0_SCL/USCI1_CTL0/SC0_CLK/PWM0_CH0/PSIO0_C
H4/UART2_TXD/TM0/INT0
JP3.2
2
PB.4/EADC0_CH4/ACMP1_P1/EBI_ADR1/I2C0_SDA/USCI1_CTL1/SC0_DAT/PWM0_CH1/PSIO0_
CH5/UART2_RXD/TM1/INT1
JP3.3
3
PB.3/EADC0_CH3/ACMP0_N/EBI_ADR2/I2C1_SCL/UART1_TXD/USCI1_DAT1/SC0_RST/PWM0_
CH2/PSIO0_CH6/PWM0_BRAKE0/TM2/INT2
JP3.4
4
PB.2/EADC0_CH2/ACMP0_P1/OPA0_O/EBI_ADR3/I2C1_SDA/UART1_RXD/USCI1_DAT0/SC0_P
WR/PWM0_CH3/PSIO0_CH7/TM3/INT3
JP3.5
5
PC.12/EBI_ADR4/UART0_TXD/I2C0_SCL/SC0_nCD/PWM1_CH0/ACMP0_O
JP3.6
6
PC.11/EBI_ADR5/UART0_RXD/I2C0_SDA/PWM1_CH1/ACMP1_O
JP3.7
7
PC.10/EBI_ADR6/PWM1_CH2
JP3.8
8
PC.9/EBI_ADR7/PWM1_CH3
JP3.9
9
PB.1/EADC0_CH1/OPA0_N/EBI_ADR8/UART2_TXD/USCI1_CLK/I2C1_SCL/QSPI0_MISO1/PWM0
_CH4/PWM1_CH4/PWM0_BRAKE0
JP3.10
10
PB.0/EADC0_CH0/OPA0_P/EBI_ADR9/UART2_RXD/SPI0_I2SMCLK/I2C1_SDA/QSPI0_MOSI1/P
WM0_CH5/PWM1_CH5/PWM0_BRAKE1
JP3.11
11
VSS
JP3.12
12
VDD
JP3.13
13
PA.11/ACMP0_P0/EBI_nRD/USCI0_CLK/BPWM0_CH0/TM0_EXT
JP3.14
14
PA.10/ACMP1_P0/EBI_nWR/USCI0_DAT0/BPWM0_CH1/TM1_EXT/DAC0_ST
JP3.15
15
PA.9/EBI_MCLK/USCI0_DAT1/UART1_TXD/BPWM0_CH2/TM2_EXT
JP3.16
16
PA.8/EBI_ALE/USCI0_CTL1/UART1_RXD/BPWM0_CH3/TM3_EXT/INT4
JP3.17
17
NC
JP3.18
18
PD.12/EBI_nCS0/UART2_RXD/BPWM0_CH5/CLKO/EADC0_ST/INT5
JP3.19
19
PD.11/EBI_nCS1/UART1_TXD
JP3.20
20
PD.10/EBI_nCS2/UART1_RXD
JP3.21
21
NC
JP3.22
22
NC
JP3.23
23
NC
JP3.24
24
NC
JP3.25
25
NC
JP3.26
26
NC
JP3.27
27
NC
JP3.28
28
PF.7/EBI_ADR18/SC0_DAT/SPI0_MISO
JP3.29
29
PF.6/EBI_ADR19/SC0_CLK/SPI0_MOSI/EBI_nCS0/TAMPER0

NuMaker-M252KG
July. 08, 2020 Page 13 of 49 Rev 1.00
NuMaker-M252KG USER MANUAL
Maker Nu-mbed NUC472 User Manual
Header
M252KG6AE
Pin No.
Function
JP3.30
30
VBAT
JP3.31
31
PF.5/UART2_RXD/UART2_nCTS/PWM0_CH0/BPWM0_CH4/X32_IN/EADC0_ST
JP3.32
32
PF.4/UART2_TXD/UART2_nRTS/PWM0_CH1/BPWM0_CH5/X32_OUT
JP5
JP5.1
33
NC
JP5.2
34
NC
JP5.3
35
NC
JP5.4
36
NC
JP5.5
37
PF.3/EBI_nCS0/UART0_TXD/I2C0_SCL/XT1_IN/BPWM1_CH0
JP5.6
38
PF.2/EBI_nCS1/UART0_RXD/I2C0_SDA/QSPI0_CLK/XT1_OUT/BPWM1_CH1
JP5.7
39
NC
JP5.8
40
NC
JP5.9
41
PE.8/EBI_ADR10/USCI1_CTL1/UART2_TXD/PWM0_CH0/PWM0_BRAKE0
JP5.10
42
PE.9/EBI_ADR11/USCI1_CTL0/UART2_RXD/PWM0_CH1/PWM0_BRAKE1
JP5.11
43
PE.10/EBI_ADR12/USCI1_DAT0/PWM0_CH2/PWM1_BRAKE0
JP5.12
44
PE.11/EBI_ADR13/USCI1_DAT1/UART1_nCTS/PWM0_CH3/PWM1_BRAKE1
JP5.13
45
PE.12/EBI_ADR14/USCI1_CLK/UART1_nRTS/PWM0_CH4
JP5.14
46
PE.13/EBI_ADR15/I2C0_SCL/UART1_TXD/PWM0_CH5/PWM1_CH0/BPWM1_CH5
JP5.15
47
PC.8/EBI_ADR16/I2C0_SDA/UART1_RXD/PWM1_CH1/BPWM1_CH4
JP5.16
48
PC.7/EBI_AD9/UART0_nCTS/I2C1_SMBAL/PWM1_CH2/BPWM1_CH0/TM0/INT3
JP5.17
49
PC.6/EBI_AD8/UART0_nRTS/I2C1_SMBSUS/PWM1_CH3/BPWM1_CH1/TM1/INT2
JP5.18
50
PA.7/EBI_AD7/UART0_TXD/I2C1_SCL/PWM1_CH4/BPWM1_CH2/ACMP0_WLAT/TM2/INT1
JP5.19
51
PA.6/EBI_AD6/UART0_RXD/I2C1_SDA/PWM1_CH5/BPWM1_CH3/ACMP1_WLAT/TM3/INT0
JP5.20
52
VSS
JP5.21
53
VDD
JP5.22
54
PD.15/PSIO0_CH7/PWM0_CH5/TM3/INT1
JP5.23
55
PA.5/QSPI0_MISO1/UART0_nCTS/UART0_TXD/I2C0_SCL/BPWM0_CH5/PWM0_CH0
JP5.24
56
PA.4/QSPI0_MOSI1/SPI0_I2SMCLK/SC0_nCD/UART0_nRTS/UART0_RXD/I2C0_SDA/USCI2_CTL
1/BPWM0_CH4/PWM0_CH1
JP5.25
57
PA.3/QSPI0_SS/SPI0_SS/SC0_PWR/I2C0_SMBAL/UART1_TXD/I2C1_SCL/PSIO0_CH4/USCI2_C
TL0/BPWM0_CH3/PWM0_CH2/CLKO/PWM1_BRAKE1
JP5.26
58
PA.2/QSPI0_CLK/SPI0_CLK/SC0_RST/I2C0_SMBSUS/UART1_RXD/I2C1_SDA/PSIO0_CH5/USCI
2_CLK/BPWM0_CH2/PWM0_CH3
JP5.27
59
PA.1/QSPI0_MISO0/SPI0_MISO/SC0_DAT/UART0_TXD/UART1_nCTS/PSIO0_CH6/USCI2_DAT0/
BPWM0_CH1/PWM0_CH4
JP5.28
60
PA.0/QSPI0_MOSI0/SPI0_MOSI/SC0_CLK/UART0_RXD/UART1_nRTS/PSIO0_CH7/USCI2_DAT1/

NuMaker-M252KG
July. 08, 2020 Page 14 of 49 Rev 1.00
NuMaker-M252KG USER MANUAL
Maker Nu-mbed NUC472 User Manual
Header
M252KG6AE
Pin No.
Function
BPWM0_CH0/PWM0_CH5/DAC0_ST
JP5.29
61
VDDIO
JP5.30
62
PE.14/EBI_AD8/UART2_TXD/PSIO0_CH0
JP5.31
63
PE.15/EBI_AD9/UART2_RXD/PSIO0_CH1
JP5.32
64
nRESET
Note: It is recommended to use 10 kΩ pull-up resistor and 10 uF capacitor on nRESET pin.
JP4
JP4.1
65
PF.0/UART1_TXD/I2C1_SCL/UART0_TXD/BPWM1_CH0/ICE_DAT
Note: It is recommended to use 100 kΩpull-up resistor on ICE_DAT pin.
JP4.2
66
PF.1/UART1_RXD/I2C1_SDA/UART0_RXD/BPWM1_CH1/ICE_CLK
Note: It is recommended to use 100 kΩpull-up resistor on ICE_CLK pin.
JP4.3
67
PD.9/EBI_AD7/UART2_nCTS/PSIO0_CH2
JP4.4
68
PD.8/EBI_AD6/UART2_nRTS/PSIO0_CH3
JP4.5
69
PC.5/EBI_AD5/QSPI0_MISO1/UART2_TXD/I2C1_SCL/PWM1_CH0/PSIO0_CH0
JP4.6
70
PC.4/EBI_AD4/QSPI0_MOSI1/UART2_RXD/I2C1_SDA/PWM1_CH1/USCI2_CTL1/PSIO0_CH1
JP4.7
71
PC.3/EBI_AD3/QSPI0_SS/UART2_nRTS/I2C0_SMBAL/PWM1_CH2/USCI2_CTL0/PSIO0_CH2
JP4.8
72
PC.2/EBI_AD2/QSPI0_CLK/UART2_nCTS/I2C0_SMBSUS/PWM1_CH3/USCI2_CLK/PSIO0_CH3
JP4.9
73
PC.1/EBI_AD1/QSPI0_MISO0/UART2_TXD/I2C0_SCL/PWM1_CH4/USCI2_DAT0/ACMP0_O
JP4.10
74
PC.0/EBI_AD0/QSPI0_MOSI0/UART2_RXD/I2C0_SDA/PWM1_CH5/USCI2_DAT1/ACMP1_O
JP4.11
75
VSS
JP4.12
76
VDD
JP4.13
77
NC
JP4.14
78
NC
JP4.15
79
NC
JP4.16
80
NC
JP4.17
81
NC
JP4.18
82
NC
JP4.19
83
NC
JP4.20
84
PD.7/UART1_TXD/I2C0_SCL/USCI1_CLK/PSIO0_CH4
JP4.21
85
PD.6/UART1_RXD/I2C0_SDA/USCI1_DAT1/PSIO0_CH5
JP4.22
86
PD.5/I2C1_SCL/USCI1_DAT0/PSIO0_CH6
JP4.23
87
PD.4/USCI0_CTL0/I2C1_SDA/USCI1_CTL1/PSIO0_CH7
JP4.24
88
PD.3/EBI_AD10/USCI0_CTL1/SPI0_SS/USCI1_CTL0/UART0_TXD
JP4.25
89
PD.2/EBI_AD11/USCI0_DAT1/SPI0_CLK/UART0_RXD

NuMaker-M252KG
July. 08, 2020 Page 15 of 49 Rev 1.00
NuMaker-M252KG USER MANUAL
Maker Nu-mbed NUC472 User Manual
Header
M252KG6AE
Pin No.
Function
JP4.26
90
PD.1/EBI_AD12/USCI0_DAT0/SPI0_MISO
JP4.27
91
PD.0/EBI_AD13/USCI0_CLK/SPI0_MOSI/TM2
JP4.28
92
PD.13/EBI_AD10/SPI0_I2SMCLK/USCI2_CTL0
JP4.29
93
USB_VBUS
JP4.30
94
USB_D-
JP4.31
95
USB_D+
JP4.32
96
USB_VDD33_CAP
JP6
JP6.1
97
PE.7/PSIO0_CH0/PWM0_CH0/BPWM0_CH5
JP6.2
98
PE.6/SC0_nCD/USCI0_CTL0/PSIO0_CH1/PWM0_CH1/BPWM0_CH4
JP6.3
99
PE.5/EBI_nRD/SC0_PWR/USCI0_CTL1/PSIO0_CH2/PWM0_CH2/BPWM0_CH3
JP6.4
100
PE.4/EBI_nWR/SC0_RST/USCI0_DAT1/PSIO0_CH3/PWM0_CH3/BPWM0_CH2
JP6.5
101
PE.3/EBI_MCLK/SC0_DAT/USCI0_DAT0/PWM0_CH4/BPWM0_CH1
JP6.6
102
PE.2/EBI_ALE/SC0_CLK/USCI0_CLK/USCI2_CTL0/PWM0_CH5/BPWM0_CH0
JP6.7
103
NC
JP6.8
104
NC
JP6.9
105
PE.1/EBI_AD10/QSPI0_MISO0/I2C1_SCL/USCI2_DAT1
JP6.10
106
PE.0/EBI_AD11/QSPI0_MOSI0/I2C1_SDA/USCI2_DAT0
JP6.11
107
NC
JP6.12
108
NC
JP6.13
109
NC
JP6.14
110
NC
JP6.15
111
NC
JP6.16
112
VSS
JP6.17
113
LDO_CAP
JP6.18
114
VDD
JP6.19
115
PC.14/EBI_AD11/SPI0_I2SMCLK/USCI0_CTL0/QSPI0_CLK/USCI2_CLK/TM1
JP6.20
116
PB.15/EADC0_CH15/EBI_AD12/SPI0_SS/USCI0_CTL1/UART0_nCTS/PSIO0_CH0/PWM1_CH0/T
M0_EXT/PWM0_BRAKE1
JP6.21
117
PB.14/EADC0_CH14/EBI_AD13/SPI0_CLK/USCI0_DAT1/UART0_nRTS/PSIO0_CH1/PWM1_CH1/
TM1_EXT/CLKO
JP6.22
118
PB.13/EADC0_CH13/ACMP0_P3/ACMP1_P3/EBI_AD14/SPI0_MISO/USCI0_DAT0/UART0_TXD/P
SIO0_CH2/PWM1_CH2/TM2_EXT
JP6.23
119
PB.12/EADC0_CH12/DAC0_OUT/ACMP0_P2/ACMP1_P2/EBI_AD15/SPI0_MOSI/USCI0_CLK/UAR
T0_RXD/PSIO0_CH3/PWM1_CH3/TM3_EXT
JP6.24
120
AVDD

NuMaker-M252KG
July. 08, 2020 Page 16 of 49 Rev 1.00
NuMaker-M252KG USER MANUAL
Maker Nu-mbed NUC472 User Manual
Header
M252KG6AE
Pin No.
Function
JP6.25
121
VREF
JP6.26
122
AVSS
JP6.27
123
PB.11/EADC0_CH11/EBI_ADR16/UART0_nCTS/I2C1_SCL/SPI0_I2SMCLK/BPWM1_CH0
JP6.28
124
PB.10/EADC0_CH10/EBI_ADR17/USCI1_CTL0/UART0_nRTS/I2C1_SDA/BPWM1_CH1
JP6.29
125
PB.9/EADC0_CH9/EBI_ADR18/USCI1_CTL1/UART0_TXD/UART1_nCTS/I2C1_SMBAL/BPWM1_C
H2
JP6.30
126
PB.8/EADC0_CH8/EBI_ADR19/USCI1_CLK/UART0_RXD/UART1_nRTS/I2C1_SMBSUS/BPWM1_
CH3
JP6.31
127
PB.7/EADC0_CH7/EBI_nWRL/USCI1_DAT0/UART1_TXD/EBI_nCS0/BPWM1_CH4/PWM1_BRAKE
0/PWM1_CH4/INT5/ACMP0_O
JP6.32
128
PB.6/EADC0_CH6/EBI_nWRH/USCI1_DAT1/UART1_RXD/EBI_nCS1/BPWM1_CH5/PWM1_BRAK
E1/PWM1_CH5/INT4/ACMP1_O
Table 3-2 M252KG6AE Full-pin Extension Connectors and GPIO Function List

NuMaker-M252KG
July. 08, 2020 Page 17 of 49 Rev 1.00
NuMaker-M252KG USER MANUAL
Maker Nu-mbed NUC472 User Manual
3.3.2 Arduino UNO Compatible Extension Connectors
Figure 3-4 shows the Arduino UNO compatible extension connectors.
MISO CLK RESET SS
PA.9 PA.11 nRESET PA.8
USCI0_DAT1 USCI0_CLK
5V MOSI GND -
VDD PA.10 VSS PB.15
USCI0_DAT0
PWM0_CH0 PA.5 D8
PWM0_CH1 PA.4 D9
SPI0_SS PWM0_CH2 PA.3 D10
SPI0_MOSI PWM0_CH5 PA.0 D11
SPI0_MISO PWM0_CH4 PA.1 D12
SPI0_CLK PWM0_CH3 PA.2 D13
VSS VSS
VREF VREF
UART2_RXD I2C0_SDA PC.0 SDA
UART2_TXD I2C0_SCL PC.1 SCL
UART1_RXD PWM0_CH3 PB.2 D0
UART1_TXD PWM0_CH2 PB.3 D1
I2C1_SDA PWM1_CH1 PC.4 D2
I2C1_SCL PWM1_CH0 PC.5 D3
PWM1_CH2 PC.3 D4
PWM1_CH3 PC.2 D5
PWM1_CH4 PA.7 D6
PWM1_CH5 PA.6 D7
VIN
VSS
VSS
5V
3V
RST
IOREF VDD
NC
A5 PB.1 EADC0_CH1 I2C1_SCL UART2_TXD
A4 PB.0 EADC0_CH0 I2C1_SDA UART2_RXD
A3 PB.4 EADC0_CH4
A2 PB.5 EADC0_CH5
A1 PB.6 EADC0_CH6
A0 PB.7 EADC0_CH7
NuMaker-RoLaD-M252 V1.1
Figure 3-4 Arduino UNO Compatible Extension Connectors

NuMaker-M252KG
July. 08, 2020 Page 18 of 49 Rev 1.00
NuMaker-M252KG USER MANUAL
Maker Nu-mbed NUC472 User Manual
Header
NuMaker-M252KG
Header
NuMaker-M252KG
Compatible to
Arduino UNO
GPIO Pin of M252
Compatible to
Arduino UNO
GPIO Pin of M252
N
U
4
NU3.1
D0
PB.2
N
U
2
NU2.6
A5
PB.1
NU3.2
D1
PB.3
NU2.5
A4
PB.0
NU3.3
D2
PC.4
NU2.4
A3
PB.4
NU3.4
D3
PC.5
NU2.3
A2
PB.5
NU3.5
D4
PC.3
NU2.2
A1
PB.6
NU3.6
D5
PC.2
NU2.1
A0
PB.7
NU3.7
D6
PA.7
N
U
1
NU1.8
VIN
-
NU3.8
D7
PA.6
NU1.7
VSS
N
U
3
NU4.1
D8
PA.5
NU1.6
VSS
NU4.2
D9
PA.4
NU1.5
5V
NU4.3
D10
PA.3
NU1.4
3V
NU4.4
D11
PA.0
NU1.3
RST
nRESET
NU4.5
D12
PA.1
NU1.2
IOREF
VDD
NU4.6
D13
PA.2
NU1.1
NC
-
NU4.7
VSS
VSS
NU4.8
VREF
VREF
NU4.9
SDA
PC.0
NU4.10
SCL
PC.1
Table 3-3 Arduino UNO Extension Connectors and M252KG6AE Mapping GPIO List

NuMaker-M252KG
July. 08, 2020 Page 19 of 49 Rev 1.00
NuMaker-M252KG USER MANUAL
Maker Nu-mbed NUC472 User Manual
Power Supply Configuration
The NuMaker-M252KG is able to adopt multiple power supply. External power source includes NU1
Vin (7 V to 12 V), VDD (depends on target chip operating voltage), and PC through USB connector.
By using switches and voltage regulator, multiple power domains can be created on the NuMaker-
M252KG.
3.4.1 VIN Power Source
Table 3-4 presents the Vin power source.
Connector
Net Name in
Schematic
Comment
NU1 pin8
NU1_VIN
Board external power source, with voltage range from 7
V to 12 V. The voltage regulator UP2 converts the NU1
pin8 input voltage to 5 V and supplies it to NuMaker-
M252KG.
Table 3-4 Vin Power Source

NuMaker-M252KG
July. 08, 2020 Page 20 of 49 Rev 1.00
NuMaker-M252KG USER MANUAL
Maker Nu-mbed NUC472 User Manual
3.4.2 5 V Power Sources
Table 3-5 presents the 5 V power sources.
Connector
Net Name in
Schematic
Comment
ICEJ3
USB_HS_VBUS
ICE USB connector supplies 5 V power from PC to
M252 platform and Nu-Link2-Me.
J2
USB_VBUS
USB connector on NuMaker-M252KG supplies 5 V
power from PC to M252 platform and Nu-Link2-Me.
NU1 pin5
NU1_5VCC
ICEJ3, J2 or NU1 pin8 supplies 5 V power to NU1 pin5.
NU1 pin5 supplies 5 V power to target chip or Arduino
adapter board.
Table 3-5 5V Power Sources
3.4.3 3.3 V Power Sources
Table 3-6 presents the 3.3 V power sources.
Voltage Regulator
5V Source
Comment
ICEUP1
USB_HS_VBUS
ICEUP1 converts USB_HS_VBUS to 3.3 V and supplies
3.3V to M252 platform or ICE chip.
UP1
USB_VBUS
UP1 converts USB_VBUS to 3.3 V and supplies 3.3 V
to M252 platform.
Note: SW2.2(NU1 3VCC) should be switched to ON.
UP1
NU1_5VCC
UP1 converts NU1_5VCC to 3.3 V and supplies 3.3 V to
M252 platform.
Note: SW2.2(NU1 3VCC) should be switched to ON.
Table 3-6 3.3 V Power Sources
3.4.4 1.8V Power Sources
Table 3-7 presents the 1.8 V power source.
Voltage Regular
5V Source
Comment
ICEUP2
USB_HS_VBUS
ICEUP2 converts USB_HS_VBUS to 1.8V and supplies
1.8V to M252 platform or ICE chip.
Table 3-7 1.8V Power Sources