Nuvoton 1T 8051 User manual

N76E885

Jan 26, 2018 Page 1of 18 Rev 1.00

NUTINY-SDK-N76E885 USER MANUAL

1T 8051

8-bit Microcontroller

Nuvoton 1T 8051-based Microcontroller

NuTiny-SDK-N76E885

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 .........................................................................................3

2NUTINY-SDK-N76E885 INTRODUCTION.....................................................4

Virtual COM Port Switch Description ............................................................... 42.1

NuTiny-SDK-N76E885 Power Setting and Connector........................................... 42.2

2.2.1 Power Setting ...................................................................................................4

2.2.2Debug Connector ...............................................................................................5

2.2.3 ICE USB Connector ............................................................................................5

2.2.4 Extended Connector ...........................................................................................5

2.2.5 Reset Button.....................................................................................................5

2.2.6 Power Connector ...............................................................................................5

2.2.7 Virtual COM Port Function Switch ...........................................................................5

Pin Assignment for Extended Connector .......................................................... 62.3

3How to Start NuTiny-SDK-N76E885 on the Keil C-®IDE.......................8

Downloading and Installing Keil C-®IDE Software.................................. 83.1

Downloading and Installing Nuvoton Nu-Link Driver............................................. 83.2

Hardware Setup........................................................................................ 83.3

Example Program...................................................................................... 83.4

4NuTiny-EVB-N76E885 Schematic............................................................. 13

Nu-Link-Me Schematic...............................................................................134.1

NuTiny-SDK-N76E885 Schematic.................................................................144.2

5Downloading NuVOTON 8bit 8051 MCUs Related Files from Nuvoton Website...... 15

Downloading Nuvoton Keil C-®IDE Driver...........................................155.1

Downloading Nuvoton 8bit 8051 MCUs N76E885 Series Sample Code ....................165.2

6REVISION HISTORY............................................................................ 17

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1 OVERVIEW

NuTiny-SDK-N76E885 is the specific development tool for 8-bit high performance 1T 8051-based

microcontroller N76E885 series. User can use NuTiny-SDK-N76E885 to develop and verify the

application program easily.

NuTiny-SDK-N76E885 includes two portions. One is NuTiny-EVB-N76E885 and the other is Nu-

Link-Me. NuTiny-EVB-N76E885 is the evaluation board and Nu-Link-Me is its Debug Adaptor.

Thus, user does not need other additional ICE or debug equipment.

The Nuvoton 1T 8051-based microcontroller N76E885 series is function compatible with the

N76E616 and N76E885 series, the 8-bit high performance 1T 8051-based microcontroller. The

instruction set is fully compatible with the standard 80C51 and performance enhanced. The

N76E885 series can bridge the gap and replace the cost equivalent to traditional 4T, 6T and 12T

8-bit microcontroller by 1T 8-bit high performance and rich functions. With high performance CPU

core and rich well-designed peripherals, the N76E885 benefits to meet a general purpose, home

appliances, or motor control system accomplishment.

The N76E885 series can run up to 16 MHz, and operate at a wide voltage range of 2.4V ~ 5.5V

and temperature range of -40℃~ +105℃. For the N76E885 series, the embedded program flash

size is up to 18 Kbytes, SRAM is 256 bytes, and 256 Bytes of auxiliary RAM (XRAM). The

N76E885 series also offers size configurable 4K/3K/2K/1K/0K bytes flash of LDROM for the ISP,

which provides flexibility to user developed Boot Code.

The N76E885 series has many high-performance peripheral functions, such as 22.1184 MHz

high-speed internal RC oscillator (trimmed to ±1% when VDD 5.0V, ±2% in all conditions), Up to

25 general purpose I/O pins and one input-only pin, four 16-bit timers, two full-duplex UARTs

ports with frame error detection and automatic address recognition, one SPI interface, one I2C

interface, up to five enhanced 16-bit PWM output channels, 8 channels 12-bit ADC, Watchdog

Timer, Self Wake-up Timer, and a Brown-out Detector. The peripherals are equipped with 18

sources with 4-level-priority interrupts capability. All these peripherals have been incorporated into

the N76E885 series to reduce component count, board space and system cost.

Additionally, the N76E885 series is equipped with ISP (In-System Programming) and ICP (In-

Circuit Programming) functions, which allow the user to update the program memory without

removing the chip from the actual end product. The N76E885 series also supports In-Application-

Programming (IAP) function, user switches the code executing without the chip reset after the

embedded flash updated.

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2 NUTINY-SDK-N76E885 INTRODUCTION

NuTiny-SDK-N76E885 uses the N76E885AT28 as the target microcontroller. Figure 2-1 is

NuTiny-SDK-N76E885 for the N76E885 series, the left portion is called NuTiny-EVB-N76E885

and the right portion is Debug Adaptor called Nu-Link-Me.

NuTiny-EVB-N76E885 is similar to other development boards. User can use it to develop and

verify applications to emulate the real behavior. The on-board chip covers N76E885 series

features. The NuTiny-EVB-N76E885 can be a real system controller to design users target

systems.

Nu-Link-Me is a Debug Adaptor. The Nu-Link-Me Debug Adaptor connects your PC's USB port to

the users target system (via Serial Wired Debug Port) and allows user to program and debug

embedded programs on the target hardware. To use Nu-Link-Me Debug adaptor with Keil, please

refer to Nuvoton Nu-Link debug adapter is document will be stored in

the local hard disk when user installs each driver. Nu-Link-Me also supports virtual COM port

function. User can use Nu-Link-Me as a USB to UART virtual COM port, which connects to on-

board N76E885AT28 UART0.

ICE Controller

Extended Connector

Reset Key

(SW1)

Power LED

ICE Controller

USB Connector

（ICEJ1)

GND

VCC

GPIO LED

Figure 2-1 NuTiny-SDK-N76E885 (PCB Board)

Virtual COM Port Switch Description2.1 The switch in Nu-Link-Me, SW3, determines that the virtual COM port function is enabled or

disabled. When user turns on all of the positions of switch, the virtual COM port function will be

enabled. By using virtual COM port function, user can access the USB device in the same way as

it would access a standard COM port to N76E885AT28 UART0. To use this function, user needs

to install VCOM Driverat first. User can get VCOM Driverfrom NuMicroDVD

www.nuvoton.com\NuMicroDVD in folder Software Utilities.

NuTiny-SDK-N76E885 Power Setting and Connector2.2

2.2.1 Power Setting

J1: USB port in Nu-Link-Me

JPR1: VCC33 or VCC5 Voltage connector in NuTiny-EVB-N76E885

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Model

JPR1

J1USB port

JP7 & JP9 VCC33

MCU Voltage

Model 1

Select VCC33

(default) orVCC5

Connect to PC

DC 3.3V output

DC 3.3V

Model 2

DC 2.4 V ~ 5.5 V

Input

Voltage by JP7 &

JP9 input

2.2.2 Debug Connector

JP4: Connector in target board (NuTiny-EVB-N76E885) for connecting with Nuvoton ICE

adaptor (Nu-Link-Me)

JP7: Connector in ICE adaptor (Nu-Link-Me) for connecting with a target board (for

example NuTiny-EVB-N76E885)

2.2.3 ICE USB Connector

J1: Mini USB Connector in Nu-Link-Me connected to a PC USB port

2.2.4 Extended Connector

JP7 and JP8: Show all chip pins in NuTiny-EVB-N76E885

2.2.5 Reset Button

SW1: Reset button in NuTiny-EVB-N76E885

2.2.6 Power Connector

J2: VCC connector in NuTiny-EVB-N76E885

J4: GND connector in NuTiny-EVB-N76E885

2.2.7 Virtual COM Port Function Switch

SW3: Switch ON/OFF to enable or disable Nu-Link-Me virtual COM port function.

Function

Switch

Descriptions

Enable

Enable Nu-Link-Me virtual

COM port function

Disable

OFF

Disable Nu-Link-Me virtual

COM port function

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Pin Assignment for Extended Connector2.3 NuTiny-EVB-N76E885 provides N76E885AT28 on board and the extended connector for TSSOP-

20 pin. Table 2-1 is the pin assignment for N76E885AT28.

Pin No

Pin Function

Pin No

Pin Function

GND

P3.4

P1.0/XIN/PWM0

P3.5

P1.1/XOUT/PWM1

P3.6

P1.2/



P3.7

P2.0/AIN9/IC0/T0/RXD

P2.6/AIN8/PWM7/CLO

P2.1/IC1/T1/MOSI

P0.7/AIN7/PWM6

P2.2/IC2/MISO

P0.6/AIN6/PWM5/SCL

P2.3/SDA/FB/STADC

P0.5/AIN5/PWM4/SPCLK

P2.4/RXD_1

P0.4/AIN4/



P2.5/TXD_1

P0.3/AIN3/PWM3/TXD

P3.0

P0.2/AIN2/PWM2

P3.1

P0.1/AIN1/



/ICPCK/OCDCK

P3.2

P0.0/AIN0/VREF/



/ICPDA/OCDDA

P3.3

VDD

Table 2-1 Pin Assignment for N76E885AT28

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N76E885

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3 HOW TO START NUTINY-SDK-N76E885 ON THE KEIL C-51 μVISION®IDE

Downloading and Installing Keil C-51 μVision®IDE Software3.1 Please connect to the Keil company website (http://www.keil.com) to download the Keil C-51

®IDE and install the RVMDK.

Downloading and Installing Nuvoton Nu-Link Driver3.2 Please connect to Nuvoton 8bit 8051 MCUs website (http://www.nuvoton.com/8bit-8051-mcus) to

Nu-Link_Keil_Driversection 5.1 for the detailed download flow.

After the Nu-Link driver is downloaded, please unzip the file for example   Nu-

Link_Keil_Driver 2.03.6674

Hardware Setup3.3 The hardware setup is shown as Figure 3-1

Figure 3-1 NuTiny-SDK-N76E885 Hardware Setup

Example Program3.4 This example demonstrates the ease of downloading and debugging an application on a NuTiny-

SDK-N76E885 board. It can be found on Figure 3-2 list directory and downloaded from Nuvoton

8bit 8051 MCUs website.

The example file can be found in the directory list shown in Figure 3-2.

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