Nuvoton NuMicro 8051 Series User manual

NuMaker-ML56SD
Mar. 08, 2021 Page 1of 46 Rev 1.01
NUMAKER-ML56SD USER MANUAL
Maker Nu-mbed NUC472 User Manual
1T 8051
8-bit Microcontroller
NuMaker-ML56SD
User Manual
NuMicro®8051 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 .................................................................................... 7
3Hardware Configuration.................................................................. 8
Front View...................................................................................... 8
Rear View...................................................................................... 9
Extension Connectors.......................................................................10
3.3.1 Pin Assignment for Extension Connectors...................................................... 10
3.3.2 NuMaker-TNLCDSub_ML56SD Compatible Extension Connectors ....................... 14
3.3.3 Arduino UNO Compatible Extension Connectors ............................................. 16
Power Supply Configuration ...............................................................18
3.4.1 VIN Power Source.................................................................................. 18
3.4.2 5 V Power Sources ................................................................................. 18
3.4.3 3.3 V Power Sources............................................................................... 19
3.4.4 1.8 V Power Sources............................................................................... 19
3.4.5 Power Connectors.................................................................................. 19
3.4.6 USB Connectors .................................................................................... 20
3.4.7 Power Switches..................................................................................... 20
3.4.8 Power Supply Models.............................................................................. 20
External Reference Voltage Connector ..................................................23
Ammeter Connector.........................................................................23
Push Buttons .................................................................................24
LEDs...........................................................................................24
Touch Key.....................................................................................24
LCD ............................................................................................25
Nu-Link2-Me..................................................................................28
3.11.1 VCOM Switches..................................................................................... 28
3.11.2 Status LEDs ......................................................................................... 28
4Quick Start ............................................................................... 29
Toolchains Supporting ......................................................................29
Nuvoton Nu-Link Driver Installation.......................................................29
BSP Firmware Download...................................................................31
Hardware Setup..............................................................................31
Find the Example Project...................................................................33

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Execute the Project under Toolchains....................................................33
4.6.1 Keil C51 .............................................................................................. 33
4.6.2 IAR EW8051......................................................................................... 37
5NuMaker-ML56SD Schematics....................................................... 39
Nu-Link2-Me..................................................................................39
ML56 platform................................................................................40
Extension Connector........................................................................41
TK and LCD Cap.............................................................................42
PCB Placement ..............................................................................43
6NuMaker-TNLCDSub_ML56SD Schematics ....................................... 44
LCD Connector...............................................................................44
7REVISION HISTORY................................................................... 45

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List of Figures
Figure 1-1 NuMaker-ML56SD Development Board......................................................................... 6
Figure 3-1 Front View of NuMaker-ML56SD.................................................................................... 8
Figure 3-2 Rear View of NuMaker-ML56SD.................................................................................... 9
Figure 3-3 ML56SD1AE Extension Connectors............................................................................. 10
Figure 3-4 Arduino UNO Compatible Extension Connectors......................................................... 16
Figure 3-5 External Power Supply Sources on Nu-Link2-Me........................................................ 20
Figure 3-6 External Power Supply Sources on ML56 Platform ..................................................... 21
Figure 3-7 Detach the Nu-Link2-Me from NuMaker-ML56SD ....................................................... 22
Figure 3-8 Wiring between Ammeter Connector and Ammeter..................................................... 24
Figure 3-9 The LCD Digit Mapping Table ...................................................................................... 25
Figure 4-1 Nu-Link USB Driver Installation Setup.......................................................................... 29
Figure 4-2 Nu-Link USB Driver Installation.................................................................................... 30
Figure 4-3 Open VCOM Function .................................................................................................. 31
Figure 4-4 ICE USB Connector...................................................................................................... 31
Figure 4-5 Device Manger.............................................................................................................. 32
Figure 4-6 PuTTY Session Setting................................................................................................. 32
Figure 4-7 Template Project Folder Path....................................................................................... 33
Figure 4-8 Warning Message of “Device not found” ...................................................................... 33
Figure 4-9 Project File Migrate to Version 5 Format...................................................................... 34
Figure 4-10 Debugger Setting in Options Window......................................................................... 34
Figure 4-11 Programming Setting in Options Window................................................................... 35
Figure 4-12 Compile and Download the Project............................................................................ 35
Figure 4-13 Keil C51 Debug Mode ................................................................................................ 36
Figure 4-14 Debug Message on Serial Port Terminal Windows.................................................... 36
Figure 4-15 IAR EW8051 Window................................................................................................. 37
Figure 4-16 Compile and Download the Project............................................................................ 37
Figure 4-17 IAR EW8051 Debug Mode ......................................................................................... 38
Figure 4-18 Debug Message on Serial Port Terminal Windows.................................................... 38
Figure 5-1 Nu-Link2-Me Circuit...................................................................................................... 39
Figure 5-2 ML56 platform Circuit.................................................................................................... 40
Figure 5-3 Extension Connectors Circuit ....................................................................................... 41
Figure 5-4 Touch Key and LCD Cap Circuit .................................................................................. 42
Figure 5-5 Front Placement ........................................................................................................... 43
Figure 5-6 Rear Placement............................................................................................................ 43
Figure 6-1 LCD Connectors of NuMaker-TNLCDSUB_ML56........................................................ 44

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List of Tables
Table 3-1 Extension Connectors.................................................................................................... 10
Table 3-2 ML56SD1AE Full-pin Extension Connectors and GPIO Function List .......................... 13
Table 3-3 NuMaker-TNLCDSub_ML56SD Compatible Extension Connectors............................. 16
Table 3-4 Arduino UNO Extension Connectors and ML56SD1AE Mapping GPIO List................. 17
Table 3-5 Vin Power Source.......................................................................................................... 18
Table 3-6 5 V Power Sources........................................................................................................ 18
Table 3-7 3.3 V Power Sources..................................................................................................... 19
Table 3-8 1.8 V Power Sources..................................................................................................... 19
Table 3-9 Power Connectors ......................................................................................................... 19
Table 3-10 USB Connectors.......................................................................................................... 20
Table 3-11 Power Switches ........................................................................................................... 20
Table 3-12 Supply External Power through Nu-Link2-Me ............................................................. 21
Table 3-13 Supply External Power for ML56 Platform................................................................... 23
Table 3-14 External Reference Voltage Connector....................................................................... 23
Table 3-15 Ammeter Connector..................................................................................................... 23
Table 3-16 Push-Buttons ............................................................................................................... 24
Table 3-17 LEDs ............................................................................................................................ 24
Table 3-18 Touch Key.................................................................................................................... 24
Table 3-19 LCD Specifications....................................................................................................... 25
Table 3-20 LCD Pin Mapping Table............................................................................................... 27
Table 3-21 VCOM Function of Nu-Link2-Me.................................................................................. 28
Table 3-22 Operation Status LED Patterns ................................................................................... 28

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1 OVERVIEW
The NuMaker-ML56SD is a development board for Nuvoton NuMicro®ML56 series microcontrollers.
The ML56 series is the first of NuMicro®8051 series integrated with touch key and LCD controller
functions. The touch key controller passes the IEC 61000-4-6 10 Vrms test with high touch sensitivity
and high-noise immunity. The LCD controller can drive up to 10 cm x 10 cm panel. And an embedded
programmable internal charge pump circuit that can provides stable VLCD regardless of the voltage
change of VDD to maintain the excellent display quality of LCD panel. The NuMaker-ML56SD platform
consists of three parts: an ML56 evaluation board, an on-board Nu-Link2-Me debugger and
programmer, and a HTN-LCD panel module. The NuMaker-ML56SD is designed for project evaluation,
prototype development and validation with power consumption monitoring function.
The ML56 evaluation board is based on the NuMicro® ML56SD1AE MCU. For the development
flexibility, the ML56 platform provides the extension connectors of ML56SD1AE, 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. Additionally, the capacitive touch key sensing function on TK0 is an example for the touch
key hardware design rules, firmware library functions, and related the PC developing tool. In addition to
the capacitive touch key sensing function, the NuMaker-ML56SD provides 8 x 28 COM/SEG LCD
display function. With the HTN-LCD panel, user can implement LCD display function of ML56SD1AE
easily. In addition to the ML56 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 can be shown on the built-in LEDs. Lastly, the Nu-Link2-Me can be
detached from the development board and become a stand-alone mass production programmer.
Figure 1-1 NuMaker-ML56SD Development Board

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2 FEATURES
NuMicro®ML56SD1AE microcontroller with function compatible with:
ML56LD1AE
ML56MD1AE
ML56LC1AE
ML56TC1AE
ML56SD1AE full pin extension connectors
HTN-LCD panel module board can be plugged into extension connectors
Arduino UNO compatible extension connectors
Ammeter connector for measuring the microcontroller’s power consumption
Flexible board power source:
External VDD power connector
Arduino UNO compatible extension connector Vin
USB FS connector on ML56 evaluation board
ICE USB connector on Nu-Link2-Me
Supports one touch key on board
Equipped with 1 touch key + reference pad + shielding electrode
Touch development tool can set the hardware and software parameters automatically
Supports 8 x 25 COM/SEG HTN-LCD panel on NuMaker-TNLCDSub_ML56SD
1/4 bias, 1/8 duty, 8 x 25 COM/SEG
On-board Nu-Link2-Me debugger and programmer:
Debug through SWD interface
On-line/off-line programming
Virtual COM port function

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3 HARDWARE CONFIGURATION
Front View
ICE USB Connector
VCOM Switch
Reset Button
ICE Status LED
Off-line Program Button
USB PWR Connector
Power LED
P3.2 LED
VDD Switch
ML56SD1AE ML56SD1AE Extension Connectors
Arduino UNO Compatible Extension Connectors
External VDD Connector
Nu-Link2-Me
Ammeter
ICE Chip: M48SSIDAE
External VSS Connector
ML56 Platform
External VREF Connector
TK0 Touch key
TK6 Shileding
P0.0 LED
NuMaker-TNLCDSub_ML56SD Extension Connectors
Figure 3-1 Front View of NuMaker-ML56SD
Figure 3-1 shows the main components and connectors from the front side of NuMaker-ML56SD. The
following lists components and connectors from the front view:
Target chip: ML56SD1AE (U1)
USB PWR Connector (J2)
Arduino UNO Compatible Extension Connectors (NU1, NU2, NU3, NU4)
ML56 Extension Connectors (JP3, JP4, JP5, JP6 , JP7 , JP8 , JP9 and JP10)
NuMaker-TNLCDSub_ML56 Extension Connectors (JP3, JP4, JP5 and JP6)
External VDD Power Connector (JP1)
External VSS Power Connector (JP2)
External VREF Connector (VREF)
VDD Switch (SW2)
Ammeter Connector (AMMETER)
Reset Button (SW1)
Power LED, P3.2 LED and P0.0 LED (LEDG1, LEDR1 and LEDG2)
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)

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Rear View
Figure 3-2 shows the main components and connectors from the rear side of NuMaker-ML56SD.
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-ML56SD

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Extension Connectors
Table 3-1 presents the extension connectors.
Connector
Description
JP3, JP4, JP5 , JP6 ,
JP7 , JP8 , JP9 and
JP10
Full pins extension connectors on the NuMaker-ML56SD.
JP3, JP4, JP5 and JP6
NuMaker-TNLCDSub_ML56SD extension connectors on the NuMaker-
ML56SD.
NU1, NU2, NU3 and
NU4
Arduino UNO compatible pins on the NuMaker-ML56SD.
Table 3-1 Extension Connectors
3.3.1 Pin Assignment for Extension Connectors
The NuMaker-ML56SD provides the ML56SD1AE onboard and extension connectors (JP3, JP4, JP5
and JP6). The Figure 3-3 shows the ML56SD1AE extension connectors.
JP3
Pin1 ~ Pin16
JP6
Pin49 ~ Pin64
JP5 Pin17 ~ Pin32
JP4 Pin33 ~ Pin48
JP10 Pin17 ~ Pin32
JP7 Pin33 ~ Pin48 JP8
Pin49 ~ Pin64
JP9
Pin1 ~ Pin16
Figure 3-3 ML56SD1AE Extension Connectors

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Header
ML56SD1AE
Pin
No.
Function
JP3
JP9
JP3.1
JP9.1
1
P2.6 / LCD_SEG6 / UART1_RXD / PWM3_CH1 / ACMP1_O
JP3.2
JP9.2
2
P2.5 / ADC_CH0 / ACMP0_P0 / ACMP1_P0 / I2C0_SCL / PWM0_CH0 / UART2_TXD / T0 /
INT0
JP3.3
JP9.3
3
P2.4 / ADC_CH1 / ACMP0_N0 / LCD_COM1 / I2C0_SDA / PWM0_CH1 / UART2_RXD / T1 /
INT1
JP3.4
JP9.4
4
P2.3 / ADC_CH2 / ACMP0_P1 / ACMP1_P1 / I2C1_SCL / LCD_COM2 / UART1_TXD /
PWM0_CH2 / PWM0_BRAKE
JP3.5
JP9.5
5
P2.2 / ADC_CH3 / ACMP1_N0 / I2C1_SDA / LCD_COM3 / UART1_RXD / PWM0_CH3
JP3.6
JP9.6
6
2.1 / ADC_CH4 / ACMP0_P2 / ACMP1_P2 / LCD_SEG5 / UART2_TXD / I2C1_SCL /
PWM0_CH4 / PWM3_CH0 / PWM0_BRAKE
JP3.7
JP9.7
7
P2.0 / ADC_CH5 / ACMP0_N1 / LCD_SEG4 / UART2_RXD / I2C1_SDA / PWM0_CH5 /
PWM3_CH1 / PWM0_BRAKE
JP3.8
JP9.8
8
P1.3 / IC0
JP3.9
JP9.9
9
P1.2 / LCD_DH2 / UART3_TXD / IC1
JP3.10
JP9.10
10
P1.1 / LCD_DH1 / UART3_RXD / UART1_TXD / IC2
JP3.11
JP9.11
11
P1.0 / UART1_RXD / IC0
JP3.12
JP9.12
12
VLCD
JP3.13
JP9.13
13
P5.7 / PWM0_BRAKE / PWM0_CH4 / CLKO
JP3.14
JP9.14
14
P5.5 / UART2_RXD / PWM0_CH0 / X32_IN / STADC
JP3.15
JP9.15
15
P5.4 / UART2_TXD / PWM0_CH1 / X32_OUT
JP3.16
JP9.16
16
P5.3 / UART0_TXD / I2C0_SCL / XT1_IN
JP5
JP10
JP5.1
JP10.1
17
P5.2 / UART0_RXD / I2C0_SDA / XT1_OUT
JP5.2
JP10.2
18
P3.5 / LCD_SEG3 / PWM2_CH0 / T0
JP5.3
JP10.3
19
P3.4 / LCD_SEG2 / PWM2_CH1 / T1
JP5.4
JP10.4
20
P0.7 / LCD_SEG1 / UART0_TXD / I2C1_SCL / PWM3_CH0 / INT1
JP5.5
JP10.5
21
P0.6 / LCD_SEG0 / UART0_RXD / I2C1_SDA / PWM3_CH1 / INT0
JP5.6
JP10.6
22
VSS
JP5.7
JP10.7
23
VDD
JP5.8
JP10.8
24
P3.6 / TK7 / PWM0_CH5 / INT1
JP5.9
JP10.9
25
P0.5 / UART0_TXD / I2C0_SCL / TK6 / PWM0_CH0
JP5.10
JP10.10
26
P0.4 / UART0_RXD / I2C0_SDA / TK5 / PWM0_CH1
JP5.11
JP10.11
27
P0.3 / SPI0_SS / SPI1_SS / UART1_TXD / I2C1_SCL / TK4 / STADC / PWM0_CH2 / CLKO
JP5.12
JP10.12
28
P0.2 / SPI0_CLK / SPI1_CLK / UART1_RXD / I2C1_SDA / TK3 / PWM0_CH3
JP5.13
JP10.13
29
P0.1 / SPI0_MISO / SPI1_MISO / UART2_RXD / UART0_TXD / TK2 / PWM0_CH4
JP5.14
JP10.14
30
P0.0 / SPI0_MOSI / SPI1_MOSI / UART2_TXD / UART0_RXD / TK1 / PWM0_CH5

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JP5.15
JP10.15
31
P5.6 / PWM0_BRAKE / PWM0_CH1 / CLKO
JP5.16
JP10.16
32
nRESET
JP4
JP7
JP4.1
JP7.1
33
P5.0 / UART1_TXD / I2C1_SCL / UART0_TXD / ICE_DAT
JP4.2
JP7.2
34
P5.1 / UART1_RXD / I2C1_SDA / UART0_RXD / ICE_CLK
JP4.3
JP7.3
35
P4.5 / LCD_SEG31 / LCD_COM4 / UART2_TXD / I2C1_SCL / PWM1_CH0
JP4.4
JP7.4
36
P4.4 / LCD_SEG30 / LCD_COM5 / UART2_RXD / I2C1_SDA / TK12 / PWM1_CH1
JP4.5
JP7.5
37
P4.3 / LCD_SEG29 / LCD_COM6 / TK13 / PWM2_CH0
JP4.6
JP7.6
38
P4.2/ LCD_SEG28 / LCD_COM7 / TK14 / PWM2_CH1
JP4.7
JP7.7
39
P4.1 / LCD_SEG27 / LCD_COM2 / UART2_TXD / I2C0_SCL / PWM3_CH0 / ACMP0_O
JP4.8
JP7.8
40
P4.0 / LCD_SEG26 / LCD_COM3 / UART2_RXD / I2C0_SDA / PWM3_CH1 / ACMP1_O / INT1
JP4.9
JP7.9
41
P6.3 / LCD_SEG25 / SPI0_SS / UART0_TXD / TK8
JP4.10
JP7.10
42
P6.2 / LCD_SEG24 / UART3_TXD / SPI0_CLK / UART0_RXD / TK9
JP4.11
JP7.11
43
P6.1 / LCD_SEG23 / UART3_RXD / SPI0_MISO / TK10
JP4.12
JP7.12
44
P6.0 / LCD_SEG22 / SPI0_MOSI / TK11
JP4.13
JP7.13
45
P1.4 / LCD_SEG21 / I2C1_SCL / LCD_COM4
JP4.14
JP7.14
46
P1.5 / LCD_SEG20 / I2C1_SDA / LCD_COM5
JP4.15
JP7.15
47
P1.6 / LCD_SEG19 / UART0_TXD / LCD_COM6
JP4.16
JP7.16
48
P1.7 / LCD_SEG18 / UART0_RXD / LCD_COM7
JP6
JP8
JP6.1
JP8.1
49
VSS
JP6.2
JP8.2
50
P4.6 / LCD_SEG17 / PWM0_CH0 / T0 / CLKO / INT0
JP6.3
JP8.3
51
VDD
JP6.4
JP8.4
52
P4.7 / LCD_SEG16 / LCD_COM0 / T1
JP6.5
JP8.5
53
P3.3 / LCD_SEG15 / SPI1_SS / LCD_COM1 / PWM1_CH0 / IC0 / PWM0_BRAKE
JP6.6
JP8.6
54
P3.2 / ADC_CH7 / ACMP1_N1 / LCD_SEG14 / SPI1_CLK / UART3_RXD / PWM1_CH1 / IC1 /
CLKO
JP6.7
JP8.7
55
P3.1 / ADC_CH6 / ACMP0_P3 / ACMP1_P3 / LCD_SEG13 / SPI1_MISO / UART3_TXD /
UART0_TXD / PWM2_CH0 / IC2
JP6.8
JP8.8
56
P3.0 / ADC_CH10 / LCD_SEG12 / SPI1_MOSI / UART0_RXD / PWM2_CH1 / IC0
JP6.9
JP8.9
57
AVDD
JP6.10
JP8.10
58
VREF
JP6.11
JP8.11
59
AVSS
JP6.12
JP8.12
60
P6.7 / ADC_CH11 / LCD_SEG11 / I2C1_SCL
JP6.13
JP8.13
61
P6.6 / ADC_CH12 / LCD_SEG10 / LCD_V1 / I2C1_SDA
JP6.14
JP8.14
62
P6.5 / ADC_CH13 / LCD_SEG9 / LCD_V2 / UART0_TXD
JP6.15
JP8.15
63
P6.4 / ADC_CH14 / LCD_SEG8 / LCD_V3 / UART0_RXD

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JP6.16
JP8.16
64
P2.7 / ADC_CH15 / LCD_SEG7 / UART1_TXD / PWM3_CH0 / ACMP0_O
Table 3-2 ML56SD1AE Full-pin Extension Connectors and GPIO Function List

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3.3.2 NuMaker-TNLCDSub_ML56SD Compatible Extension Connectors
Table 3-3 shows the NuMaker-TNLCDSub_ML56SD compatible extension connectors.
Header
ML56SD1AE
Header
NuMaker-
TNLCDSub_ML56SD
Pin No.
Function
Function
JP3
JP3.1
1
LCD_SEG6
J3.11
SEG11
JP3.2
2
LCD_COM0
J3.20
COM4
JP3.3
3
LCD_COM1
J3.19
COM3
JP3.4
4
LCD_COM2
J3.18
COM2
JP3.5
5
LCD_COM3
J3.17
COM1
JP3.6
6
LCD_SEG5
J4.6
SEG30
JP3.7
7
LCD_SEG4
J4.5
SEG29
JP3.8
8
-
-
-
JP3.9
9
-
-
-
JP3.10
10
-
-
-
JP3.11
11
-
-
-
JP3.12
12
-
-
-
JP3.13
13
-
-
-
JP3.14
14
-
-
-
JP3.15
15
-
-
-
JP3.16
16
-
-
-
JP5
JP5.1
17
-
-
-
JP5.2
18
LCD_SEG3
J4.4
SEG28
JP5.3
19
LCD_SEG2
J4.3
SEG27
JP5.4
20
LCD_SEG1
J4.2
SEG26
JP5.5
21
LCD_SEG0
J4.1
SEG25
JP5.6
22
-
-
-
JP5.7
23
-
-
-
JP5.8
24
-
-
-
JP5.9
25
-
-
-
JP5.10
26
-
-
-
JP5.11
27
-
-
-

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JP5.12
28
-
-
-
JP5.13
29
-
-
-
JP5.14
30
-
-
-
JP5.15
31
-
-
-
JP5.16
32
-
-
-
JP4
JP4.1
33
-
-
-
JP4.2
34
-
-
-
JP4.3
35
LCD_COM4
J3.24
COM8
JP4.4
36
LCD_COM5
J3.23
COM7
JP4.5
37
LCD_COM6
J3.22
COM6
JP4.6
38
LCD_COM7
J3.21
COM5
JP4.7
39
-
-
-
JP4.8
40
LCD_SEG26
J4.24
SEG48
JP4.9
41
LCD_SEG25
J4.23
SEG47
JP4.10
42
LCD_SEG24
J4.22
SEG46
JP4.11
43
LCD_SEG23
J4.21
SEG45
JP4.12
44
LCD_SEG22
J4.20
SEG44
JP4.13
45
LCD_SEG21
J4.19
SEG43
JP4.14
46
LCD_SEG20
J4.18
SEG42
JP4.15
47
LCD_SEG19
J4.17
SEG41
JP4.16
48
LCD_SEG18
J4.16
SEG40
JP6
JP6.1
49
-
-
-
JP6.2
50
LCD_SEG17
J4.15
SEG39
JP6.3
51
-
-
-
JP6.4
52
LCD_SEG16
J4.14
SEG38
JP6.5
53
LCD_SEG15
J4.13
SEG37
JP6.6
54
LCD_SEG14
J4.12
SEG36
JP6.7
55
-
-
-
JP6.8
56
-
-
-
JP6.9
57
-
-
-
JP6.10
58
-
-
-
JP6.11
59
-
-
-

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NUMAKER-ML56SD USER MANUAL
Maker Nu-mbed NUC472 User Manual
JP6.12
60
LCD_SEG11
J4.11
SEG35
JP6.13
61
LCD_SEG10
J4.10
SEG34
JP6.14
62
LCD_SEG9
J4.9
SEG33
JP6.15
63
LCD_SEG8
J4.8
SEG32
JP6.16
64
LCD_SEG7
J4.7
SEG31
Table 3-3 NuMaker-TNLCDSub_ML56SD Compatible Extension Connectors
3.3.3 Arduino UNO Compatible Extension Connectors
Figure 3-4 shows the Arduino UNO compatible extension connectors.
UART0_TXD PWM0_CH0 P0.5 D8
UART0_RXD PWM0_CH1 P0.4 D9
I2C1_SDA PWM0_CH2 P0.3 D10
PWM1_CH5 P0.0 D11
PWM0_CH4 P0.1 D12
PWM0_CH3 P0.2 D13
VSS
VREF
PWM3_CH1 P4.0 SDA
PWM3_CH0 P4.1 SCL
UART1_RXD PWM0_CH3 P2.2 D0
UART1_TXD PWM0_CH2 P2.3 D1
I2C1_SDA PWM1_CH1 P4.4 D2
I2C1_SCL PWM1_CH0 P4.5 D3
PWM2_CH0 P4.3 D4
PWM2_CH1 P4.2 D5
PWM3_CH0 P0.7 D6
PWM3_CH1 P0.6 D7
VIN
VSS
VSS
5V
3V
RST
IOREF VDD
NC
A5 P2.1 ADC_CH4 I2C1_SCL UART2_TXD
A4 P2.0 ADC_CH5 I2C1_SDA UART2_RXD
A3 P2.4 ADC_CH1
A2 P2.5 ADC_CH0
A1 P2.6 UART1_RXD
A0 P2.7 ADC_CH15 UART1_TXD
Figure 3-4 Arduino UNO Compatible Extension Connectors

NuMaker-ML56SD
Mar. 08, 2021 Page 17 of 46 Rev 1.01
NUMAKER-ML56SD USER MANUAL
Maker Nu-mbed NUC472 User Manual
Header
NuMaker-ML56SD
Header
NuMaker-ML56SD
Compatible to
Arduino UNO
GPIO Pin of ML56
Compatible to
Arduino UNO
GPIO Pin of ML56
N
U
3
NU3.1
D0
P2.2
N
U
2
NU2.6
A5
P2.1
NU3.2
D1
P2.3
NU2.5
A4
P2.0
NU3.3
D2
P4.4
NU2.4
A3
P2.4
NU3.4
D3
P4.5
NU2.3
A2
P2.5
NU3.5
D4
P4.3
NU2.2
A1
P2.6
NU3.6
D5
P4.2
NU2.1
A0
P2.7
NU3.7
D6
P0.7
N
U
1
NU1.8
VIN
-
NU3.8
D7
P0.6
NU1.7
VSS
N
U
4
NU4.1
D8
P0.5
NU1.6
VSS
NU4.2
D9
P0.4
NU1.5
5V
NU4.3
D10
P0.3
NU1.4
3V
NU4.4
D11
P0.0
NU1.3
RST
nRESET
NU4.5
D12
P0.1
NU1.2
IOREF
VDD
NU4.6
D13
P0.2
NU1.1
NC
-
NU4.7
VSS
VSS
NU4.8
VREF
VREF
NU4.9
SDA
P4.0
NU4.10
SCL
P4.1
Table 3-4 Arduino UNO Extension Connectors and ML56SD1AE Mapping GPIO List

NuMaker-ML56SD
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NUMAKER-ML56SD USER MANUAL
Maker Nu-mbed NUC472 User Manual
Power Supply Configuration
The NuMaker-ML56SD is able to adopt multiple power supply. External power sources include NU1 Vin
(7 V to 12 V), VDD (depending 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-ML56SD.
3.4.1 VIN Power Source
Table 3-5 presents the Vin power source.
Connector
Net Name in
Schematic
Description
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 NU1_5VCC.
Table 3-5 Vin Power Source
3.4.2 5 V Power Sources
Table 3-6 presents the 5 V power sources.
Connector
Net Name in
Schematic
Description
ICEJ3
USB_HS_VBUS
ICE USB connector supplies 5 V power from PC to
ML56 platform and Nu-Link2-Me.
J2
USB_VBUS
USB connector on NuMaker-ML56SD supplies 5 V
power from PC to ML56 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.
Note: ML56 operating voltage range is from 1.8 V to
3.6 V. Do not switch SW2.1 (NU1 5VCC) to ON.
Table 3-6 5 V Power Sources

NuMaker-ML56SD
Mar. 08, 2021 Page 19 of 46 Rev 1.01
NUMAKER-ML56SD USER MANUAL
Maker Nu-mbed NUC472 User Manual
3.4.3 3.3 V Power Sources
Table 3-7 presents the 3.3 V power sources.
Voltage
Regulator
5 V Source
Description
ICEUP1
USB_HS_VBUS
ICEUP1 converts USB_HS_VBUS to 3.3 V and
supplies 3.3 V to ML56 platformor ICE chip.
UP1
USB_VBUS
UP1 converts USB_VBUS to 3.3 V and supplies 3.3 V
to ML56 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 ML56 platform.
Note: SW2.2 (NU1 3VCC) should be switched to ON.
Table 3-7 3.3 V Power Sources
3.4.4 1.8 V Power Sources
Table 3-8 presents the 1.8 V power source.
Voltage Regular
5V Source
Description
ICEUP2
USB_HS_VBUS
ICEUP2 converts USB_HS_VBUS to 1.8 V and
supplies 1.8 V to ML56 platformor ICE chip.
Table 3-8 1.8 V Power Sources
3.4.5 Power Connectors
Table 3-9 presents the power connectors.
Connector
Description
JP1
VDD connector on the NuMaker-ML56SD.
Note: ML56SD1AE operating voltage range is from 1.8 V to 3.6 V.
JP2
VSS connector on the NuMaker-ML56SD.
Table 3-9 Power Connectors

NuMaker-ML56SD
Mar. 08, 2021 Page 20 of 46 Rev 1.01
NUMAKER-ML56SD USER MANUAL
Maker Nu-mbed NUC472 User Manual
3.4.6 USB Connectors
Table 3-10 presents the USB connectors.
Connector
Description
ICEJ3
ICE USB connector on Nu-Link2-Me for power supply, debugging and
programming from PC.
J2
USB FS connector on NuMaker-ML56SD for power supply.
Table 3-10 USB Connectors
3.4.7 Power Switches
Table 3-11 presents the power switches.
Switch
Description
ICEJPR1
Configures the target chip operating voltage at 1.8 V / 3.3 V / 5 V.
Note: ML56SD1AE operating voltage range is from 1.8 V to 3.6 V. Do
not switch ICEJPR1 (MCUVCC) to 5 V.
ICEJPR2
Configures the ICE chip operating voltage at 1.8 V / 3.3 V.
SW2
Configures the target chip operating voltage at 3.3 V / 5 V.
Note: ML56SD1AE operating voltage range is from 1.8 V to 3.6 V. Do
not switch SW2.1 (NU1 5VCC) to ON.
Table 3-11 Power Switches
3.4.8 Power Supply Models
External Power Supply through Nu-Link2-Me to Target Chip
The external power supply source on Nu-Link2-Me is shown in Figure 3-5.
ICE USB Connector
(ICEJ3)
Nu-Link2-Me
Figure 3-5 External Power Supply Sources on Nu-Link2-Me
To use ICEJ3 as external power supply source with Nu-Link2-Me, please follow the steps below: