Nuvoton 1T 8051 User manual

N76E885
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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
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
X
X
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
1
2
3
4
Enable
ON
ON
ON
ON
Enable Nu-Link-Me virtual
COM port function
Disable
OFF
OFF
OFF
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
01
GND
15
P3.4
02
P1.0/XIN/PWM0
16
P3.5
03
P1.1/XOUT/PWM1
17
P3.6
04
P1.2/






18
P3.7
05
P2.0/AIN9/IC0/T0/RXD
19
P2.6/AIN8/PWM7/CLO
06
P2.1/IC1/T1/MOSI
20
P0.7/AIN7/PWM6
07
P2.2/IC2/MISO
21
P0.6/AIN6/PWM5/SCL
08
P2.3/SDA/FB/STADC
22
P0.5/AIN5/PWM4/SPCLK
09
P2.4/RXD_1
23
P0.4/AIN4/




10
P2.5/TXD_1
24
P0.3/AIN3/PWM3/TXD
11
P3.0
25
P0.2/AIN2/PWM2
12
P3.1
26
P0.1/AIN1/







/ICPCK/OCDCK
13
P3.2
27
P0.0/AIN0/VREF/







/ICPDA/OCDDA
14
P3.3
28
VDD
Table 2-1 Pin Assignment for N76E885AT28

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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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Directory
Figure 3-2 Example Directory
To use this example:
1. Open a project from the N76E885 sample code installation folder (default as C:\Nuvoton)
using the following path：
\N76E885_SampleCode_Keil_C51_V1.0\Sample_Code\1.GPIO
2. GPIO.uvproj
Enter compile mode interface
3
4
5

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3. Compiler
4. Define Debug Tool as Nuvoton 8051 Keil C51 Driver
Press Settingbuttom to confirm the connect is correct as show following window for
example: