Silicon Laboratories C8051F500 User manual

C8051F500DK

C8051F500 DEVELOPMENT KIT USER’SGUIDE

1. Relevant Devices

The C8051F500 Development Kit is intended as a development platform for the microcontrollers in the C8051F50x

MCU family. The members of this MCU family are: C8051F500, C8051F501, C8051F502, C8051F503,

C8051F504, C8051F505, C8051F506, and C8051F507.

The target board included in this kit is provided with a pre-soldered C8051F500 MCU (QFP48 package) and a

C8051F502 (QFN32 package).

Code developed on the C8051F500 can be easily ported to the other members of this MCU family.

Refer to the C8051F50x data sheet for the differences between the members of this MCU family.

2. Kit Contents

The C8051F500 Development Kit contains the following items:

C8051F500 Target Board

C8051Fxxx Development Kit Quick-Start Guide

Silicon Laboratories IDE and Product Information CD-ROM. CD content includes:

Silicon Laboratories Integrated Development Environment (IDE)

 Keil 8051 Development Tools (macro assembler, linker, evaluation ‘C’ compiler)

 Source code examples and register definition files

 Documentation

 C8051F500 Development Kit User’s Guide (this document)

AC to DC Power Adapter

USB Debug Adapter (USB to Debug Interface)

Two USB Cables

3. Getting Started

The necessary software to download, debug, and communicate with the target microcontroller is included in the

CD-ROM. The following software is necessary to build a project, download code to, and communicate with the

target microcontroller:

Silicon Laboratories Integrated Development Environment (IDE)

Keil 8051 Development Tools (macro assembler, linker, evaluation ‘C’ compiler)

Other useful software that is provided in the CD-ROM includes:

Configuration Wizard 2

Keil uVision Drivers

CP210x USB to UART Virtual COM Port (VCP) Drivers

C8051F500DK

2 Rev. 0.1

3.1. Software Installation

The included CD-ROM contains the Silicon Laboratories Integrated Development Environment (IDE), Keil software

8051 tools and additional documentation. Insert the CD-ROM into your PC’s CD-ROM drive. An installer will

automatically launch, allowing you to install the IDE software or read documentation by clicking buttons on the

Installation Panel. If the installer does not automatically start when you insert the CD-ROM, run autorun.exe found

in the root directory of the CD-ROM. Refer to the ReleaseNotes.txt file on the CD-ROM for the latest information

regarding known problems and restrictions. After installing the software, see the following sections for information

regarding the software and running one of the demo applications.

3.2. CP210x USB to UART VCP Driver Installation

The C8051F500 Target Board includes a Silicon Laboratories CP2102 USB-to-UART Bridge Controller. Device

drivers for the CP2102 need to be installed before PC software such as HyperTerminal can communicate with the

target board over the USB connection. If the "Install CP210x Drivers" option is selected during installation, a driver

“unpacker” utility will launch.

1. Follow the steps to copy the driver files to the desired location. The default directory is C:\SiLabs\MCU\CP210x.

2. The final window will give an option to install the driver on the target system. Select the “Launch the CP210x VCP Driver

Installer” option if you are ready to install the driver.

3. If selected, the driver installer will now launch, providing an option to specify the driver installation location. After pressing

the “Install” button, the installer will search your system for copies of previously installed CP210x Virtual COM Port drivers. It

will let you know when your system is up to date. The driver files included in this installation have been certified by Microsoft.

4. If the “Launch the CP210x VCP Driver Installer” option was not selected in step 3, the installer can be found in the location

specified in step 2, by default C:\SiLabs\MCU\CP210x\Windows_2K_XP_S2K3_Vista. At this location run

CP210xVCPInstaller.exe.

5. To complete the installation process, connect the included USB cable between the host computer and the USB connector

(P5) on the C8051F500 Target Board. Windows will automatically finish the driver installation. Information windows will pop

up from the taskbar to show the installation progress.

6. If needed, the driver files can be uninstalled by selecting “Silicon Laboratories CP210x USB to UART Bridge (Driver

Removal” option in the “Add or Remove Programs” window.

4. Software Overview

4.1. Silicon Laboratories IDE

The Silicon Laboratories IDE integrates a source-code editor, a source-level debugger, and an in-system Flash

programmer. See Section 6. "Using the Keil Software 8051 Tools with the Silicon Laboratories IDE‚" on page 5 for

detailed information on how to use the IDE. The Keil Evaluation Toolset includes a compiler, linker, and assembler

and easily integrates into the IDE. The use of third-party compilers and assemblers is also supported.

4.1.1. IDE System Requirements

The Silicon Laboratories IDE requirements:

Pentium-class host PC running Microsoft Windows 2000 or newer.

One available USB port.

64 MB RAM and 40 MB free HD space recommended.

4.1.2. Third Party Toolsets

The Silicon Laboratories IDE has native support for many 8051 compilers. The full list of natively supported tools is:

Keil

IAR

Raisonance

Tasking

Hi-Tech

SDCC

Please note that the demo applications for the C8051F500 target board are written to work with the Keil and SDCC

toolsets.

C8051F500DK

Rev. 0.1 3

4.2. Keil Evaluation Toolset

4.2.1. Keil Assembler and Linker

The assembler and linker that are part of the Keil Demonstration Toolset are the same versions that are found in

the full Keil Toolset. The complete assembler and linker reference manual can be found on-line under the Help

menu in the IDE or in the “SiLabs\MCU\hlp” directory (A51.pdf).

4.2.2. Keil Evaluation C51 C Compiler

The evaluation version of the C51 compiler is the same as the full version with these limitations: (1) Maximum 4 kB

code generation, and (2) Floating point library not included. When installed from the CD-ROM, the C51 compiler is

initially limited to a code size of 2 kB, and programs start at code address 0x0800. Please refer to the Application

Note “AN104: Integrating Keil Tools into the Silicon Labs IDE" for instructions to change the limitation to 4 kB, and

have the programs start at code address 0x0000.

4.3. Configuration Wizard 2

The Configuration Wizard 2 is a code generation tool for all of the Silicon Laboratories devices. Code is generated

through the use of dialog boxes for each of the device's peripherals.

Figure 1. Configuration Wizard 2 Utility

The Configuration Wizard 2 utility helps accelerate development by automatically generating initialization source

code to configure and enable the on-chip resources needed by most design projects. In just a few steps, the wizard

creates complete startup code for a specific Silicon Laboratories MCU. The program is configurable to provide the

output in C or assembly. For more information, please refer to the Configuration Wizard 2 help available under the

Help menu in Config Wizard 2.

C8051F500DK

4 Rev. 0.1

4.4. Keil uVision2 and uVision3 Silicon Laboratories Drivers

As an alternative to the Silicon Laboratories IDE, the uVision debug driver allows the Keil uVision IDE to

communicate with Silicon Laboratories on-chip debug logic. In-system Flash memory programming integrated into

the driver allows for rapidly updating target code. The uVision IDE can be used to start and stop program

execution, set breakpoints, check variables, inspect and modify memory contents, and single-step through

programs running on the actual target hardware.

For more information, please refer to the uVision driver documentation. The documentation and software are

available from the Downloads webpage (www.silabs.com/mcudownloads).

5. Hardware Setup using a USB Debug Adapter

The target board is connected to a PC running the Silicon Laboratories IDE via the USB Debug Adapter as shown

in Figure 2.

1. Connect the USB Debug Adapter to one of the DEBUG connector on the target board (DEBUG_A or

DEBUG_B) with the 10-pin ribbon cable. The recommended connection is to DEBUG_A as this microcon-

troller is the primary MCU on the board and more peripherals are easily available.

2. Connect one end of the USB cable to the USB connector on the USB Debug Adapter.

3. Connect the other end of the USB cable to a USB Port on the PC.

4. Connect the AC/DC power adapter to power jack P4 on the target board.

Notes:

• Use the Reset button in the IDE to reset the target when connected using a USB Debug Adapter.

• Remove power from the target board and the USB Debug Adapter before connecting or disconnecting the

ribbon cable from the target board. Connecting or disconnecting the cable when the devices have power can

damage the device and/or the USB Debug Adapter.

Figure 2. Hardware Setup using a USB Debug Adapter

C8051F500-TB

PWR

COMM

P1.3_A

P1.3_B

P1.4_B

P1.4_A

P1 Port 0 “A”

Port 4 “A”

Port 2 “A”

Port 1 “A”

Port 3 “A”

+LIN_V

LIN_OUT

GND

DEBUG_A

CAN_H

CAN_L

GND

R27

SIDE “A”

SIDE “B”

DEBUG_B

TB3

RESET_A

RESET_B

J20

SILICON LABS

www.silabs.com

DS4

DS2

DS3

DS1

J14

J22

J19

J18

J21

J10 J9

J24

J17

Port 0 “B”

J27

Port 2 “B”

J29

Port 1 “B”

J28

J11

F502

C8051

F500

J31

J32

J8 J26

USB

Cable

AC/DC

Adapter

Target Board

Silicon Laboratories

USB DEBUG ADAPTER

Run

Stop Power

USB Debug

Adapter

C8051F500DK

Rev. 0.1 5

6. Using the Keil Software 8051 Tools with the Silicon Laboratories IDE

To perform source-level debugging with the IDE, you must configure the Keil 8051 tools to generate an absolute

object file in the OMF-51 format with object extensions and debug records enabled. You may build the OMF-51

absolute object file by calling the Keil 8051 tools at the command line (e.g., batch file or make file) or by using the

project manager built into the IDE. The default configuration when using the Silicon Laboratories IDE project

manager enables object extension and debug record generation.

Refer to Application Note

"AN104: Integrating Keil

8051 Tools into the Silicon Labs IDE"

in the “SiLabs\MCU\Documentation\ApplicationNotes” directory for additional

information on using the Keil 8051 tools with the Silicon Laboratories IDE.

To build an absolute object file using the Silicon Laboratories IDE project manager, you must first create a project.

A project consists of a set of files, IDE configuration, debug views, and a target build configuration (list of files and

tool configurations used as input to the assembler, compiler, and linker when building an output object file).

The following sections illustrate the steps necessary to manually create a project with one or more source files,

build a program, and download the program to the target in preparation for debugging. (The IDE will automatically

create a single-file project using the currently open and active source file if you select Build/Make Project before a

project is defined.)

6.1. Creating a New Project

1. Select Project→New Project to open a new project and reset all configuration settings to default.

2. Select File→New File to open an editor window. Create your source file(s) and save the file(s) with a

recognized extension, such as .c, .h, or .asm, to enable color syntax highlighting.

3. Right-click on “New Project” in the Project Window. Select Add files to project. Select files in the file

browser and click Open. Continue adding files until all project files have been added.

4. For each of the files in the

Project

Window

that you want assembled, compiled, and linked into the target

build, right-click on the file name and select

Add file to build

. Each file will be assembled or compiled as

appropriate (based on file extension) and linked into the build of the absolute object file.

Note: If a project contains a large number of files, the “Group” feature of the IDE can be used to organize the

files. Right-click on “New Project” in the

Project Window

. Select

Add Groups to project

. Add pre-defined

groups or add customized groups. Right-click on the group name and choose

Add file to group

. Select files

to be added. Continue adding files until all project files have been added.

C8051F500DK

6 Rev. 0.1

6.2. Building and Downloading the Program for Debugging

1. Once all source files have been added to the target build, build the project by clicking on the Build/Make

Project button in the toolbar or selecting Project→Build/Make Project from the menu.

Note: After the project has been built the first time, the Build/Make Project command will only build the

files that have been changed since the previous build. To rebuild all files and project dependencies, click

on the Rebuild All button in the toolbar or select Project→Rebuild All from the menu.

Before connecting to the target device, several connection options may need to be set.

Open the

Connection Options

window by selecting

Options

→

Connection Options...

in the IDE menu. First, select

the appropriate adapter in the “Serial Adapter” section. Next, the correct “Debug Interface” must be selected.

C8051F50x family devices use the Silicon Labs 2-wire (C2) debug interface. Once all the selections are made,

click the OK button to close the window.

3. Click the

Connect

button in the toolbar or select

Debug

→

Connect

from the menu to connect to the device.

4. Download the project to the target by clicking the Download Code button in the toolbar.

Note: To enable automatic downloading if the program build is successful, select Enable automatic

connect/download after build in the Project→Target Build Configuration dialog. If errors occur during

the build process, the IDE will not attempt the download.

5. Save the project when finished with the debug session to preserve the current target build configuration,

editor settings and the location of all open debug views. To save the project, select Project→Save Project

As... from the menu. Create a new name for the project and click on Save.

7. Example Source Code

Example source code and register definition files are provided in the “SiLabs\MCU\Examples\C8051F50x_1x\”

directory during IDE installation. These files may be used as a template for code development. Example

applications include a blinking LED example which configures the green LED on the target board to blink at a fixed

rate.

7.1. Register Definition Files

control/status bits. A macro definition header file compiler_defs.h is also included, and is required to be able to use

the C8051F500_defs.h header file with various tool chains. These files are installed into the

“SiLabs\MCU\Examples\C8051F50x_1x\Header_Files\” directory during IDE installation by default. The register

and bit names are identical to those used in the C8051F50x data sheet. These register definition files are also

installed in the default search path used by the Keil Software 8051 tools. Therefore, when using the Keil 8051 tools

included with the development kit (A51, C51), it is not necessary to copy a register definition file to each project’s

file directory.

7.2. Blinking LED Example

The example source files F500_Blinky.asm and F500_Blinky.c installed in the default directory

“SiLabs\MCU\Examples\C8051F50x_1x\Blinky” show examples of several basic C8051F500 functions. These

include disabling the watchdog timer (WDT), configuring the Port I/O crossbar, configuring a timer for an interrupt

routine, initializing the system clock, and configuring a GPIO port pin. When compiled/assembled and linked, this

program flashes the green LED on the C8051F500 target board about five times a second using the interrupt

handler with a C8051F500 timer.

C8051F500DK

Rev. 0.1 7

8. Target Board

The C8051F500 Development Kit includes a target board with a C8051F500 (Side A) and C8051F502 (Side B)

device pre-installed for evaluation and preliminary software development. Numerous input/output (I/O) connections

are provided to facilitate prototyping using the target board. Refer to Figure 3 for the locations of the various I/O

connectors. Figure 4 on page 9 shows the factory default shorting block positions. A summary of the signal names

and headers is provided in Table 11 on page 16.

J1-J5 Side A: Port 0 through Port 4 headers

J7 Header to choose between +5V from Debug Adapter (P2) or +5V from on-board regulator (U6)

J8 Side B: CAN Transceiver (U4) power connector

J9, J10 Side A: External crystal enable connectors

J11 Side B: Connects P1.3_B LED and P1.4_B Switch to MCU port pins

J14 Side A: CAN Transceiver (U3) power connector

J17 Side A: Connects MCU to three separate transceivers (UART(U5), CAN(U3) and LIN(T1))

J18 Side A: Connects VIO to VIO_A_SRC which powers the P1.2 potentiometer, the

/RST_A pin pull-up, and P1.4_A Switch pull-up.

J19 Side A: Connects P1.3_A LED and P1.4_A Switch to MCU port pins

J20 Side A: Connects R27 potentiometer to port pin 1.2

J21 Connect V_HIGH node from TB1 LIN header to +5V regulator input for board power

J22 Side A: Connects decoupling capacitors C28 and C29 for MCU VREF (P0.0)

J24 Side A: Connects +5V net to VIO and VREGIN of the MCU

J26 Side B: Connects MCU to three separate transceivers (CAN (U4) and LIN (T2))

J27-J29 Side B: Port 0 through Port 2 headers

J31 Side B: Connects +5V net to VIO and VREGIN of the MCU

J32 Side B: Connects decoupling capacitors C41 and C42 for MCU VREF (P0.0)

P1 Side A: 96-pin female connector

P2 Side A: DEBUG connector for Debug Adapter interface

P3 Side B: DEBUG connector for Debug Adapter interface

P4 Power connector (accepts input from 7 to 15 VDC unregulated power adapter)

P5 USB connector (connects to PC for serial communication)

TB1 Shared LIN Connector for Side A and B MCUs for external nodes

TB2 Shared CAN Connector for Side A and B MCUs for external nodes

TB3 Side A: Power supply terminal block

C8051F500DK

8 Rev. 0.1

Figure 3. C8051F500 Target Board with Pin Numbers

C8051F500-TB

PWR

COMM

P1.3_A

P1.3_B

P1.4_B

P1.4_A

P1 Port 0 “A”

Port 4 “A”

Port 2 “A”

Port 1 “A”

Port 3 “A”

+LIN_V

LIN_OUT

GND

DEBUG_A

CAN_H

CAN_L

GND

R27

SIDE “A”

SIDE “B”

DEBUG_B

TB3

RESET_A

RESET_B

J20

SILICON LABS

www.silabs.com

DS4

DS2

DS3

DS1

J14

J22

J19

J18

J21

J10 J9

J24

J17

Port 0 “B”

J27

Port 2 “B”

J29

Port 1 “B”

J28

J11

F502

C8051

F500

J31

J32

J8 J26

TB1 TB2

C8051F500DK

Rev. 0.1 9

8.1. Target Board Shorting Blocks: Factory Defaults

The C8051F500 target board comes from the factory with pre-installed shorting blocks on many headers. Figure 4

shows the positions of the factory default shorting blocks.

Figure 4. C8051F500 Target Board Shorting Blocks: Factory Defaults

C8051F500-TB

PWR

COMM

P1.3_A

P1.3_B

P1.4_B

P1.4_A

P1 Port 0 “A”

Port 4 “A”

Port 2 “A”

Port 1 “A”

Port 3 “A”

+LIN_V

LIN_OUT

GND

DEBUG_A

CAN_H

CAN_L

GND

R27

SIDE “A”

SIDE “B”

DEBUG_B

TB3

RESET_A

RESET_B

J20

SILICON LABS

www.silabs.com

DS4

DS2

DS3

DS1

J14

J22

J19

J18

J21

J10 J9

J24

J17

Port 0 “B”

J27

Port 2 “B”

J29

Port 1 “B”

J28

J11

F502

C8051

F500

J31

J32

J8 J26

C8051F500DK

10 Rev. 0.1

8.2. Target Board Power Options and Current Measurement

The C8051F500 target board supports three power options:

1. 12V DC power using the AC to DC power adapter (P4)

2. 5V DC USB VBUS power from PC via the USB Debug Adapter (DEBUG_A)

3. 12V DC power from the LIN external header (TB1)

The two 12V power sources are ORed together using reverse-biased diodes (Z1 and Z2). The ORed power is

regulated to a 5.0V DC voltage using a LDO regulator (U6). To power the board from the USB Debug Adapter

connected to DEBUG_A instead of the 12V sources, move the shorting block on the J7 header to pins 2 and 3 to

select SER_PWR. The output of the regulator powers the +5VD net on the target board, and is also connected to

one end of the header J24 (SIDE A) and J31 (SIDE B). Two shorting blocks can be put on each header to connect

the 5V net to the VREGIN and VIO pins on the two MCUs. With the shorting block removed, a source meter can be

used across the headers to measure the current consumption of the MCU.

Note: The USB Debug Adapter does not provide the necessary peak power for the CAN transceivers to operate. One of the

12V DC sources is recommended for CAN transceiver operation.

8.3. System Clock Sources

8.3.1. Internal Oscillators

The C8051F500 and C8051F502 devices installed on the target board feature a factory calibrated programmable

high-frequency internal oscillator (24 MHz base frequency, ±0.5%), which is enabled as the system clock source on

reset. After reset, the internal oscillator operates at a frequency of 187.5 kHz by default but may be configured by

software to operate at other frequencies. The on-chip crystal is accurate for CAN and LIN master communications

and in many applications an external oscillator is not required. However, if you wish to operate the C8051F500

device (SIDE A) at a frequency not available with the internal oscillator, an external crystal may be used. Refer to

the C8051F50x data sheet for more information on configuring the system clock source.

8.3.2. External Oscillator Options

The target board is designed to facilitate the installation of an external crystal. Remove shorting blocks at headers

J9 and J10 and install the crystal at the pads marked Y1. Install a 10 MΩresistor at R9 and install capacitors at C6

and C7 using values appropriate for the crystal you select. If you wish to operate the external oscillator in capacitor

or RC mode, options to install a capacitor or an RC network are also available on the target board. Populate C6 for

capacitor mode, and populate R3 and C6 for RC mode. Refer to the C8051F50x data sheet for more information on

the use of external oscillators.

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