Nuvoton NuMicro series User manual

M4521
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NUTINY-SDK-M4521 USER MANUAL
Arm®Cortex®-M
32-bit Microcontroller
NuMicro®Family
NuTiny-SDK-M4521
User Manual
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 .........................................................................................4
2NUTINY-SDK-M4521 INTRODUCTION........................................................5
NuTiny -SDK-M4521 Jumper Description ......................................................... 62.1
2.1.1 Power Setting ...................................................................................................6
2.1.2 Debug Connector ...............................................................................................6
2.1.3 USB Connector .................................................................................................6
2.1.4 Extended Connector ...........................................................................................6
2.1.5 Reset Button.....................................................................................................6
2.1.6 Power Connector ...............................................................................................6
2.1.7 Virtual COM Port Function Switch ...........................................................................6
Pin Assignment for Extended Connector .......................................................... 82.2
NuTiny-SDK-M4521 PCB Placement..............................................................162.3
3How to Start NuTiny-SDK-M4521 on the Keil μVision®IDE............................... 17
Keil uVision®IDE Software Download and Install ...............................................173.1
Nuvoton Nu-Link Driver Download and Install ...................................................173.2
Hardware Setup.......................................................................................173.3
Example Program.....................................................................................183.4
4How to Start NuTiny-SDK-M4521 on the IAR Embedded Workbench .................. 19
IAR Embedded Workbench Software Download and Install...................................194.1
Nuvoton Nu-Link Driver Download and Install ...................................................194.2
Hardware Setup.......................................................................................194.3
Example Program.....................................................................................204.4
5Starting to Use Nu-Link-Me 3.0 VCOM Function............................................ 21
Downloading and Installing VCOM Driver ........................................................21
5.1
VCOM Mode Setting on NuTiny-SDK-M4521....................................................225.2
Setup on the Development Tool....................................................................225.3
5.3.1 Check the Using UART on the Keil μVision®IDE........................................................ 22
5.3.2 Check the Target Device and Debug Setting ............................................................ 23
5.3.3 Build and Download Code to NuTiny-SDK-M4521...................................................... 25
5.3.4 Open the Serial Port Terminal .............................................................................. 25
5.3.5 Reset Chip ..................................................................................................... 25
6NuTiny-SDK-M4521 Schematic................................................................ 27
NuTiny-EVB-M4521 Schematic ....................................................................276.1

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Nu-Link-Me V3.0 Schematic ........................................................................286.2
7REVISION HISTORY............................................................................ 29

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NUTINY-SDK-M4521 USER MANUAL
1 OVERVIEW
NuTiny-SDK-M4521 is the specific development tool for NuMicro®M4521 series. Users can use
NuTiny-SDK-M4521 to develop and verify the application program easily.
NuTiny-SDK-M4521 includes two portions. One is NuTiny-EVB-M4521 and the other is Nu-Link-
Me. NuTiny-EVB-M4521 is the evaluation board and Nu-Link-Me is its Debug Adaptor. Thus,
users do not need other additional ICE or debug equipments.

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2 NUTINY-SDK-M4521 INTRODUCTION
NuTiny-SDK-M4521 uses the M4521SE6AE as the target microcontroller. Figure 2-1 is NuTiny-
SDK-M4521 for M4521 series, the left portion is called NuTiny-EVB-M4521 and the right portion is
Debug Adaptor called Nu-Link-Me.
NuTiny-EVB-M4521 is similar to other development boards. Users can use it to develop and verify
applications to emulate the real behavior. The on board chip covers M4521 series features. The
NuTiny-EVB-M4521 can be a real system controller to design users’ target systems.
Nu-Link-Me is a Debug Adaptor. The Nu-Link-Me Debug Adaptor connects your PC's USB port to
your target system (via Serial Wired Debug Port) and allows you to program and debug
embedded programs on the target hardware. The Nu-Link-Me V3.0 also supports VCOM function,
which gives users more flexibility when debug. To use Nu-Link-Me Debug adaptor with IAR or
Keil, please refer to “Nuvoton NuMicro®IAR ICE driver user manual “or Nuvoton NuMicro®Keil
ICE driver user manual” in detail. These two documents will be stored in the local hard disk when
the user installs each driver. To use Nu-Link-Me 3.0 VCOM function, please refer to Chapter 5.
VDD (JP1)
Reset Button
(SW1)
I/O LED
Power LED
Target Chip
Virtual COM Port
Function Switch
(SW2)
ICE Controller
USB Connector
(J2)
ICE Controller
VCC : 3.3V or 5V
(JPR1)
Extended Connector (JP5, JP7)
GND (JP4)
Extended Connector (JP6, JP8)
USB Connector
(J3)
Figure 2-1 NuTiny-SDK-M4521 (PCB Board)

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NuTiny -SDK-M4521 Jumper Description2.1
2.1.1 Power Setting
JP1: VDD Voltage connecter in NuTiny-EVB-M4521
J2: USB port in Nu-Link-Me
JPR1: Select 5.0V or 3.3V for system power
Model
JPR1
JP1 VDD
J2 ICE USB Port
MCU Voltage
Model 1
Select 3.3V
(Default)
DC 3.3V Output
Connect to PC
DC 3.3V
Model 2
Select 5.0V
DC 5.0V Output
Connect to PC
DC 5.0V
Model 3
Select 3.3V or 5.0V
DC 2.5V ~ 5.0V
Input
Connect to PC
Voltage by JP1
Input
Model 4*
X
DC 2.5V ~ 5.0V
Input
X
Voltage by JP1
Input
X: Unused.
Note*: Need to separate NuTiny-EVB-M4521 and Nu-Link-Me.
2.1.2 Debug Connector
JP2: Connector in target board (NuTiny-EVB-M4521) for connecting with Nuvoton ICE
adaptor (Nu-Link-Me)
JP11: Connector in ICE adaptor (Nu-Link-Me) for connecting with a target board (NuTiny-
EVB-M4521)
2.1.3 USB Connector
J2: Micro USB Connector in Nu-Link-Me connected to a PC USB port
J3: Micro USB Connector in NuTiny-EVB-M4521 for application use
2.1.4 Extended Connector
JP5, JP6, JP7, and JP8: Show all chip pins in NuTiny-EVB-M4521
2.1.5 Reset Button
SW1: Reset button in NuTiny-EVB-M4521
2.1.6 Power Connector
JP1: VDD connector in NuTiny-EVB-M4521
JP4: GND connector in NuTiny-EVB-M4521
2.1.7 Virtual COM Port Function Switch
SW2: Switch SW2 on/off before power on to enable/disable VCOM function.
SW2 connects pin 6(PD.0/RXD) and pin 10(PD.1/TXD) in NuTiny-EVB-M4521 with pin
22(PB.1/TXD) and pin 21(PB.0/RXD) in Nuvoton ICE adaptor (Nu-Link-Me V3.0). SW2

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connects pin 30(VCOM) in Nuvoton ICE adaptor (Nu-Link-Me V3.0) to GND to enable VCOM
function.
Switch Pin
Number
Disable VCOM Mode
Enable VCOM Mode
1
Off
On
2
Off
On
3
Off
On
4
X
X
X: Unused.

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NUTINY-SDK-M4521 USER MANUAL
Pin Assignment for Extended Connector2.2 NuTiny-EVB-M4521 provides M4521SE6AE on board and the extended connector for LQFP64-
pin. Table 2-1 is the pin assignment for M4521SE6AE.
Pin No.
Pin Name
Type
Description
1
PB.15
I/O
General purpose digital I/O pin.
EADC_CH12
A
EADC analog input channel 12.
EBI_nCS1
O
EBI chip select 1 enable output pin.
2
PB.5
I/O
General purpose digital I/O pin.
EADC_CH13
A
EADC analog input channel 13.
SPI0_MOSI0
I/O
SPI0 1st MOSI (Master Out, Slave In) pin.
SPI1_MOSI
I/O
SPI1 MOSI (Master Out, Slave In) pin.
EBI_AD6
I/O
EBI address/data bus bit 6.
UART2_RXD
I/O
Data receiver input pin for UART2.
3
PB.6
I/O
General purpose digital I/O pin.
EADC_CH14
A
EADC analog input channel 14.
SPI0_MISO0
I/O
SPI0 1st MISO (Master In, Slave Out) pin.
SPI1_MISO
I/O
SPI1 MISO (Master In, Slave Out) pin.
EBI_AD5
I/O
EBI address/data bus bit 5.
4
PB.7
I/O
General purpose digital I/O pin.
EADC_CH15
A
EADC analog input channel 15.
SPI0_CLK
I/O
SPI0 serial clock pin.
SPI1_CLK
I/O
SPI1 serial clock pin
EBI_AD4
I/O
EBI address/data bus bit 4.
STADC
I/O
ADC external trigger input.
5
nRESET
I
External reset input: active LOW, with an internal pull-up.
Set this pin low reset to initial state.
6
PD.0
I/O
General purpose digital I/O pin.
EADC_CH6
A
EADC analog input channel 6.
UART0_RXD
I
Data receiver input pin for UART0.
INT3
I
External interrupt3 input pin.
T3
I/O
Timer3 event counter input / toggle output.
7
AVSS
P
Ground pin for analog circuit.
8
PD.8
I/O
General purpose digital I/O pin.
EADC_CH7
A
EADC analog input channel 7.
EBI_nCS0
O
EBI chip select 0 enable output pin.
9
PD.9
I/O
General purpose digital I/O pin.

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Pin No.
Pin Name
Type
Description
EADC_CH10
A
EADC analog input channel 10.
EBI_ALE
O
EBI address latch enable output pin.
10
PD.1
I/O
General purpose digital I/O pin.
EADC_CH11
A
EADC analog input channel 11.
PWM0_SYNC_IN
I
PWM0 counter synchronous trigger input pin.
UART0_TXD
O
Data transmitter output pin for UART0.
T0
I/O
Timer0event counter input / toggle output
EBI_nRD
O
EBI read enable output pin.
11
PD.2
I/O
General purpose digital I/O pin.
STADC
I
ADC external trigger input.
T0_EXT
I
Timer0 external capture input.
PWM0_BRAKE0
I
PWM0 break input 0
EBI_nWR
O
EBI write enable output pin.
INT0
I
External interrupt0 input pin.
12
PD.3
I/O
General purpose digital I/O pin.
T2
I/O
Timer2 event counter input / toggle output
T1_EXT
I
Timer1 external capture input
PWM0_BRAKE1
I
PWM0 break input 1
EBI_MCLK
O
EBI external clock output pin
INT1
I
External interrupt1 input pin.
13
VBAT
Power supply by batteries for RTC and PF.0~PF.2.
14
PF.0
I/O
General purpose digital I/O pin.
X32_OUT
O
External 32.768 kHZ (low speed) crystal output pin.
INT5
I
External interrupt5 input pin.
15
PF.1
I/O
General purpose digital I/O pin.
X32_IN
I
External 32.768 kHZ (low speed) crystal input pin.
16
PF.2
I/O
General purpose digital I/O pin.
TAMPER
I/O
TAMPER detector loop pin
17
PD.12
I/O
General purpose digital I/O pin.
UART3_TXD
O
Data transmitter output pin for UART3.
PWM1_CH0
I/O
PWM1 output/capture input.
EBI_ADR16
O
EBI address bus bit 16.
18
PD.13
I/O
General purpose digital I/O pin.
UART3_RXD
I
Data receiver input pin for UART3.

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Pin No.
Pin Name
Type
Description
PWM1_CH1
I/O
PWM1 output/capture input.
EBI_ADR17
O
EBI address bus bit 17.
19
PD.14
I/O
General purpose digital I/O pin.
UART3_nCTS
I
Clear to Send input pin for UART3.
PWM1_CH2
I/O
PWM1 output/capture input.
EBI_ADR18
O
EBI address bus bit 18.
20
PD.15
I/O
General purpose digital I/O pin.
UART3_nRTS
O
Request to Send output pin for UART3.
PWM1_CH3
I/O
PWM1 output/capture input.
EBI_ADR19
O
EBI address bus bit 19.
21
PD.7
I/O
General purpose digital I/O pin.
PWM0_SYNC_IN
I
PWM0 counter synchronous trigger input pin.
T1
I/O
Timer1 event counter input / toggle output
PWM0_CH5
I/O
PWM0 output/capture input.
EBI_nRD
O
EBI read enable output pin.
22
PF.3
I/O
General purpose digital I/O pin.
XT1_OUT
O
External 4~20 MHz (high speed) crystal output pin.
I2C1_SCL
I/O
I2C1 clock pin.
23
PF.4
I/O
General purpose digital I/O pin.
XT1_IN
I
External 4~20 MHz (high speed) crystal input pin.
I2C1_SDA
I/O
I2C1 data input/output pin.
24
VSS
A
Ground pin for digital circuit.
25
VDD
A
Power supply for I/O ports and LDO source for internal
PLL and digital function.
26
LDO_CAP
A
LDO output pin.
Note: This pin needs to be connected with a 1uF
capacitor.
27
PC.0
I/O
General purpose digital I/O pin.
SPI1_CLK
I/O
SPI1 serial clock pin.
UART2_nCTS
I
Clear to Send input pin for UART2.
PWM0_CH0
I/O
PWM0 output/capture input.
EBI_AD8
I/O
EBI address/data bus bit 8.
INT2
I
External interrupt2 input pin.
UART3_TXD
O
Data transmitter output pin for UART3.
T3_EXT
I
Timer3 external capture input.
28
PC.1
I/O
General purpose digital I/O pin.

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Pin No.
Pin Name
Type
Description
CLKO
O
Clock Out
UART2_nRTS
O
Request to Send output pin for UART2.
PWM0_CH1
I/O
PWM0 output/capture input.
EBI_AD9
I/O
EBI address/data bus bit 9.
UART3_RXD
I/O
Data receiver input pin for UART3.
29
PC.2
I/O
General purpose digital I/O pin.
SPI1_SS
I
SPI1 slave select pin.
UART2_TXD
O
Data transmitter output pin for UART2.
PWM0_CH2
I/O
PWM0 output/capture input.
EBI_AD10
I/O
EBI address/data bus bit 10.
30
PC.3
I/O
General purpose digital I/O pin.
SPI1_MOSI
I/O
SPI1 MOSI (Master Out, Slave In) pin.
UART2_RXD
I
Data receiver input pin for UART2.
PWM0_CH3
I/O
PWM0 output/capture input.
EBI_AD11
I/O
EBI address/data bus bit 11.
31
PC.4
I/O
General purpose digital I/O pin.
SPI1_MISO
I/O
SPI1 MISO (Master In, Slave Out) pin.
I2C1_SCL
I/O
I2C1 clock pin.
PWM0_CH4
I/O
PWM0 output/capture input.
EBI_AD12
I/O
EBI address/data bus bit 12.
32
PC.5
I/O
General purpose digital I/O pin.
PWM0_CH5
I/O
PWM0 output/capture input.
EBI_AD13
I/O
EBI address/data bus bit 13.
33
PC.6
I/O
General purpose digital I/O pin.
I2C1_SMBAL
O
I2C1 SMBus SMBALTER# pin
PWM1_CH0
I/O
PWM1 output/capture input.
EBI_AD14
I/O
EBI address/data bus bit 14.
UART0_TXD
O
Data transmitter output pin for UART0.
34
PC.7
I/O
General purpose digital I/O pin.
I2C1_SMBSUS
O
I2C1 SMBus SMBSUS# pin (PMBus CONTROL pin)
PWM1_CH1
I/O
PWM1 output/capture input.
EBI_AD15
I/O
EBI address/data bus bit 15.
UART0_RXD
I
Data receiver input pin for UART0.
35
PF.5
I/O
General purpose digital I/O pin.

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Pin No.
Pin Name
Type
Description
ICE_CLK
I
Serial wired debugger clock pin
36
PF.6
I/O
General purpose digital I/O pin.
ICE_DAT
I/O
Serial wired debugger data pin
37
PE.8
I/O
General purpose digital I/O pin.
UART1_TXD
O
Data transmitter output pin for UART1.
SPI0_MISO1
I/O
SPI0 2nd MISO (Master In, Slave Out) pin.
I2C1_SCL
I/O
I2C1 clock pin.
SC0_PWR
O
SmartCard power pin.
CLKO
O
Clock Out
PWM0_BRAKE0
I
PWM0 break input 0
T1
I/O
Timer1 event counter input / toggle output
38
PE.9
I/O
General purpose digital I/O pin.
UART1_RXD
I
Data receiver input pin for UART1.
SPI0_MOSI1
I/O
SPI0 2nd MOSI (Master Out, Slave In) pin.
I2C1_SDA
I/O
I2C1 data input/output pin.
SC0_RST
O
SmartCard reset pin.
PWM1_BRAKE1
I
PWM1 break input 1
T2
I/O
Timer2 event counter input / toggle output
39
PE.10
I/O
General purpose digital I/O pin.
SPI1_MISO
I/O
SPI1 MISO (Master In, Slave Out) pin.
SPI0_MISO0
I/O
SPI0 1st MISO (Master In, Slave Out) pin.
UART1_nCTS
I
Clear to Send input pin for UART1.
I2C0_SMBAL
O
I2C0 SMBus SMBALTER# pin
SC0_DAT
I/O
SmartCard data pin.
UART3_TXD
O
Data transmitter output pin for UART3.
I2C1_SCL
I/O
I2C1 clock pin.
40
PE.11
I/O
General purpose digital I/O pin.
SPI1_MOSI
I/O
SPI1 MOSI (Master Out, Slave In) pin.
SPI0_MOSI0
I/O
SPI0 1st MOSI (Master Out, Slave In) pin.
UART1_nRTS
O
Request to Send output pin for UART1.
I2C0_SMBSUS
O
I2C0 SMBus SMBSUS# pin (PMBus CONTROL pin)
SC0_CLK
O
SmartCard clock pin.
UART3_RXD
I
Data receiver input pin for UART3.
I2C1_SDA
I/O
I2C1 data input/output pin.

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Pin No.
Pin Name
Type
Description
41
PE.12
I/O
General purpose digital I/O pin.
SPI1_SS
I/O
SPI1 slave select pin
SPI0_SS
I/O
SPI0 slave select pin.
UART1_TXD
O
Data transmitter output pin for UART1.
I2C0_SCL
I/O
I2C0 clock pin.
42
PE.13
I/O
General purpose digital I/O pin.
SPI1_CLK
I/O
SPI1 serial clock pin
SPI0_CLK
I/O
SPI0 serial clock pin.
UART1_RXD
I
Data receiver input pin for UART1.
I2C0_SDA
I/O
I2C0 data input/output pin.
43
VDDIO
A
Power supply for PE.8~PE.13.
44
USB_VBUS
A
Power supply from USB* host or HUB.
45
USB_D-
I
USB differential signal D-.
46
USB_D+
I
USB differential signal D+.
47
PF.7
I/O
General purpose digital I/O pin.
48
USB_VDD33_CAP
A
Internal power regulator output 3.3V decoupling pin.
Note: This pin needs to be connected with a 1uF
capacitor.
49
PA.3
I/O
General purpose digital I/O pin.
UART0_RXD
I
Data receiver input pin for UART0.
UART0_nRTS
O
Request to Send output pin for UART0.
I2C0_SCL
I/O
I2C0 clock pin.
SC0_PWR
O
SmartCard power pin.
PWM1_CH2
I/O
PWM1 output/capture input.
EBI_AD3
I/O
EBI address/data bus bit 3.
50
PA.2
I/O
General purpose digital I/O pin.
UART0_TXD
O
Data transmitter output pin for UART0.
UART0_nCTS
I
Clear to Send input pin for UART0.
I2C0_SDA
I/O
I2C0 data input/output pin.
SC0_RST
O
SmartCard reset pin.
PWM1_CH3
I/O
PWM1 output/capture input.
EBI_AD2
I/O
EBI address/data bus bit 2.
51
PA.1
I/O
General purpose digital I/O pin.
UART1_nRTS
O
Request to Send output pin for UART1.
UART1_RXD
I
Data receiver input pin for UART1.

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Pin No.
Pin Name
Type
Description
SC0_DAT
I/O
SmartCard data pin.
PWM1_CH4
I/O
PWM1 output/capture input.
EBI_AD1
I/O
EBI address/data bus bit 1.
STADC
I/O
ADC external trigger input.
52
PA.0
I/O
General purpose digital I/O pin.
UART1_nCTS
I
Clear to Send input pin for UART1.
UART1_TXD
O
Data transmitter output pin for UART1.
SC0_CLK
O
SmartCard clock pin.
PWM1_CH5
I/O
PWM1 output/capture input.
EBI_AD0
I/O
EBI address/data bus bit 0.
INT0
I
External interrupt0 input pin.
53
VSS
A
Ground pin for digital circuit.
54
VDD
A
Power supply for I/O ports and LDO source for internal
PLL and digital function.
55
AVDD
A
Power supply for internal analog circuit.
56
VREF
I
Voltage reference input for ADC.
Note: This pin needs to be connected with a 1uF
capacitor.
57
PB.0
I/O
General purpose digital I/O pin.
EADC_CH0
A
EADC analog input.
SPI0_MOSI1
I/O
SPI0 2nd MOSI (Master Out, Slave In) pin.
UART2_RXD
I
Data receiver input pin for UART2.
T2
I/O
Timer2 event counter input / toggle output
EBI_nWRL
O
EBI low byte write enable output pin.
INT1
I
External interrupt1 input pin.
58
PB.1
I/O
General purpose digital I/O pin.
EADC_CH1
A
EADC analog input channel 1.
SPI0_MISO1
I/O
SPI0 2nd MISO (Master In, Slave Out) pin.
UART2_TXD
O
Data transmitter output pin for UART2.
T3
I/O
Timer3 event counter input / toggle output
SC0_RST
O
SmartCard reset pin.
PWM0_SYNC_OUT
O
PWM0 counter synchronous trigger output pin.
EBI_nWRH
O
EBI high byte write enable output pin
59
PB.2
I/O
General purpose digital I/O pin.
EADC_CH2
A
EADC analog input channel 2.
SPI0_CLK
I/O
SPI0 serial clock pin.

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Pin No.
Pin Name
Type
Description
SPI1_CLK
I/O
SPI1 serial clock pin
UART1_RXD
I
Data receiver input pin for UART1.
SC0_CD
I
SmartCard card detect pin.
UART3_RXD
I
Data receiver input pin for UART3.
T2_EXT
I
Timer2 external capture input.
60
PB.3
I/O
General purpose digital I/O pin.
EADC_CH3
A
EADC analog input channel 3.
SPI0_MISO0
I/O
SPI0 1st MISO (Master In, Slave Out) pin.
SPI1_MISO
I/O
SPI1 MISO (Master In, Slave Out) pin.
UART1_TXD
O
Data transmitter output pin for UART1.
EBI_ALE
O
EBI address latch enable output pin.
UART3_TXD
O
Data transmitter output pin for UART3.
T0_EXT
I
Timer0 external capture input.
61
PB.4
I/O
General purpose digital I/O pin.
EADC_CH4
A
EADC analog input channel 4.
SPI0_SS
I/O
SPI0 slave select pin.
SPI1_SS
I/O
SPI1 slave select pin
UART1_nCTS
I
Clear to Send input pin for UART1.
EBI_AD7
I/O
EBI address/data bus bit 7.
UART2_TXD
O
Data transmitter output pin for UART2.
T1_EXT
I
Timer1 external capture input.
62
PB.8
I/O
General purpose digital I/O pin.
EADC_CH5
A
EADC analog input channel 5.
UART1_nRTS
O
Request to Send output pin for UART1.
PWM0_CH2
I/O
PWM0 output/capture input.
63
PB.11
I/O
General purpose digital I/O pin.
EADC_CH8
A
EADC analog input channel 8.
64
PB.12
I/O
General purpose digital I/O pin.
EADC_CH9
A
EADC analog input channel 9.
Table 2-1 Pin Assignment for M4521

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NuTiny-SDK-M4521 PCB Placement2.3 Users can refer to Figure 2-2 for the NuTiny-SDK-M4521 PCB placement.
Figure 2-2 NuTiny-SDK-M4521 PCB Placement

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3 HOW TO START NUTINY-SDK-M4521 ON THE KEIL ΜVISION®IDE
Keil uVision®IDE Software Download and Install3.1 Please visit the Keil company website (http://www.keil.com) to download the Keil μVision®IDE
and install the RVMDK.
Nuvoton Nu-Link Driver Download and Install3.2 Please visit the Nuvoton company NuMicro®website (http://www.nuvoton.com/NuMicro) to
download “NuMicro®Keil μVision®IDE driver” file. When the Nu-Link driver has been well
downloaded, please unzip the file and execute the “Nu-Link_Keil_Driver.exe” to install the driver.
Hardware Setup
3.3 The hardware setup is shown as Figure 3-1.
Figure 3-1 NuTiny-SDK-M4521 Hardware Setup

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Example Program3.4 This example demonstrates the ease of downloading and debugging an application on a NuTiny-
SDK-M4521 board. It can be found on Figure 3-2 list directory and downloaded from Nuvoton
NuMicro®website.
Directory
\\M4521_BSP_CMSIS_V3.00.000\SampleCode\StdDriver\GPIO_INT\KEIL
Project
File
Figure 3-2 Example Directory
To use this example:
This sample code runs some functions about system manager controller and clock controller, and
will show messages by Uart. Users can see the messages by following the steps of Chapter 5.
Start μVision®
Project-Open
Open the SYS.uvproj project file
Project - Build
Compile and link the SYS application
Flash –Download
Program the application code into on-
chip Flash ROM
Start debug mode
Using the debugger commands, you
may:
Review variables in the watch
window
Single step through code
Reset the device
Run the application

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NUTINY-SDK-M4521 USER MANUAL
4 HOW TO START NUTINY-SDK-M4521 ON THE IAR EMBEDDED
WORKBENCH
IAR Embedded Workbench Software Download and Install4.1 Please connect to IAR company website (http://www.iar.com) to download the IAR Embedded
Workbench and install the EWARM.
Nuvoton Nu-Link Driver Download and Install4.2 Please visit the Nuvoton company NuMicro®website (http://www.nuvoton.com/NuMicro ) to
download the “NuMicro®IAR EWARM Driver” file. When the Nu-Link driver has been well
downloaded, please unzip the file and execute the “Nu-Link_Keil_Driver.exe” to install the
driver.
Hardware Setup4.3 The hardware setup is shown as Figure 4-1.
Figure 4-1 NuTiny-SDK-M4521 Hardware Setup

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NUTINY-SDK-M4521 USER MANUAL
Example Program4.4 This example demonstrates the ease of downloading and debugging an application on a
NuTiny-SDK-M4521 board. It can be found on Figure 4-2 list directory and downloaded from
Nuvoton NuMicro®website.
Directory
\\M4521_BSP_CMSIS_V3.00.000\SampleCode\StdDriver\GPIO_INT\IAR
Project
File
Figure 4-2 Example Directory
To use this example:
This sample code runs some functions about system manager controller and clock controller, and
will show messages by Uart. Users can see the messages by following the steps of Chapter 5.
Start IAR Embedded Workbench
Project –Download and Debug
Program the application code into on-chip
Flash ROM
File-Open-Workspace
Open the SYS.eww workspace file
Single step through code
Project - Make
Compile and link the SYS application
Reset the device
Run the application