Silicon Laboratories C8051F970 User manual

Rev. 0.1 5/14 Copyright © 2014 by Silicon Laboratories C8051F970DK-UG
C8051F970DK-UG
C8051F970 DEVELOPMENT KIT USER’SGUIDE
1. Introduction
The C8051F970 Development Kit provides an evaluation and development platform for the C8051F97x MCUs.
The board has a particular focus on capacitive sensing to highlight the 43 Capacitive Sense input channels
available on the C8051F970 MCU.
1.1. Key Features
The key features of the C8051F970 Development Kit are:
Silicon Labs EFM32 C8051F970 microcontroller with 32 kB flash and 8 kB RAM.
Capacitive sensing 4 x 5 button matrix and slider highlight the unique Capacitive Sense module.
Isolated power domains for the LEDs and the MCU to enable easy power measurement.
Port headers for prototyping of custom hardware.
Figure 1. C8051F970 Target Board
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2. Relevant Documents
This document provides a hardware overview for the C8051F970 Target Board in the Development Kit. Additional
information on Simplicity Studio, Capacitive Sense Profiler, and the Capacitive Sense firmware library can be found
in the documents listed in this section.
2.1. Getting Started
For step-by-step information on getting started with the C8051F970 DK, see the C8051F970 Development Kit
Quick Start Guide. This document can be accessed in Simplicity Studio by selecting or detecting a C8051F97x
device and clicking the Quick Start Guide button.
2.2. Simplicity Studio
Simplicity Studio can be downloaded from www.silabs.com/simplicity-studio. More information on Simplicity Studio
can be found in the included help (HelpHelp Contents or HelpSearch) or in the following document:
AN0822: Simplicity Studio User's Guide — Contains basic information, tips, and tricks for using
Simplicity Studio.
This document can be found at www.silabs.com/8bit-appnotes or using the Application Notes tile in Simplicity
Studio.
2.3. Capacitive Sense
The Capacitive Sense Profiler and Capacitive Sense library are documented in:
AN0828: Capacitive Sensing Library Overview — An overview of the capacitive sensing library,
including basic tips and tricks on using the profiler tool.
AN0829: Capacitive Sensing Library Configuration Guide — Describes how to configure the capacitive
sensing library for different application requirements
These documents can be found at www.silabs.com/8bit-appnotes or using the Application Notes tile in Simplicity
Studio.
2.4. Application Notes
All 8-bit Application Notes can be found at www.silabs.com/8bit-appnotes or using the Application Notes tile in
Simplicity Studio.
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3. Hardware Setup
Refer to Figure 2 for a diagram of the hardware configuration.
1. Connect the USB Debug Adapter to the 10-pin debug connector (DEBUG, H8) on the MCU card using the
10-pin ribbon cable.
2. Connect the USB Debug Adapter to a USB Port on the PC.
3. Ensure the VDD Select switch (SW1) is in the top VREG position.
4. Verify that the JP3 power measurement jumper is populated.
5. Power the board through the power connector (P1) using the supplied 9 V ac/dc adapter.
Notes:
Use the Reset button in the IDE to reset the target when connected using a USB Debug Adapter.
Remove power from the target 5oard 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
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4. Software Setup
Simplicity Studio greatly reduces development time and complexity with Silicon Labs EFM32 and 8051 MCU
products by providing a high-powered IDE, tools for hardware configuration, and links to helpful resources, all in
one place.
Once Simplicity Studio is installed, the application itself can be used to install additional software and
documentation components to aid in the development and evaluation process.
Figure 3. Simplicity Studio
The following Simplicity Studio components are required for the C8051F970 Development Kit:
8051 Products Part Support
Simplicity Developer Platform
Download and install Simplicity Studio from www.silabs.com/8bit-software or www.silabs.com/simplicity-studio.
Once installed, run Simplicity Studio by selecting StartSilicon LabsSimplicity StudioSimplicity Studio
from the start menu or clicking the Simplicity Studio shortcut on the desktop. Follow the instructions to install the
software and click Simplicity IDE to launch the IDE.
The first time the project creation wizard runs, the Setup Environment wizard will guide the user through the
process of configuring the build tools and SDK selection.
In the Part Selection step of the wizard, select from the list of installed parts only the parts to use during
development. Choosing parts and families in this step affects the displayed or filtered parts in the later device
selection menus. Choose the C8051F97x family by checking the C8051F97x check box. Modify the part selection
at any time by accessing the Part Management dialog from the WindowPreferencesSimplicity
StudioPart Management menu item.
Simplicity Studio can detect if certain toolchains are not activated. If the Licensing Helper is displayed after
completing the Setup Environment wizard, follow the instructions to activate the toolchain.
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4.1. Loading a Demo
To download a demo to the board:
1. Click the Detect Connected Device button from the Simplicity Studio home screen.
2. Click the Demos tile from the Simplicity Studio home screen.
3. Select the desired demo from the list. For example, click the Capactive Sense (No Overlay) demo for
download to the board. A description of the demo and instructions are available in the lower area of the
window.
4. Click the Start button. This will download the demo to the board and start it running.
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4.2. Building the Blinky Example
Each project has its own source files, target configuration, SDK configuration, and build configurations such as the
Debug and Release build configurations. The IDE can be used to manage multiple projects in a collection called a
workspace. Workspace settings are applied globally to all projects within the workspace. This can include settings
such as key bindings, window preferences, and code style and formatting options. Project actions, such as build
and debug are context sensitive. For example, the user must select a project in the Project Explorer view in order
to build that project.
To create a project based on the Blinky example:
1. Click the Software Examples tile from the Simplicity Studio home screen.
2. In the Kit drop-down, select C8051F970 Development Kit, in the Part drop-down, select C8051F970, and
in the SDK drop-down, select the desired SDK. Click Next.
3. Select Example and click Next.
4. Under C8051F970 Development Kit in the Blinky folder, select F97x Blinky and click Finish.
5. Click on the project in the Project Explorer and click Build, the hammer icon in the top bar. Alternatively,
go to ProjectBuild Project.
6. Click Debug to download the project to the hardware and start a debug session.
7. Press the Resume button to start the code running. The LED should blink.
8. Press the Suspend button to stop the code.
9. Press the Reset the device button to reset the target MCU.
10. Press the Disconnect button to return to the development perspective.
4.3. Simplicity Studio Help
Simplicity Studio includes detailed help information and device documentation within the tool. The help contains
descriptions for each dialog window. To view the documentation for a dialog, click the question mark icon in the
window:
This will open a pane specific to the dialog with additional details.
The documentation within the tool can also be viewed by going to HelpHelp Contents or HelpSearch.
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4.4. CP210x USB to UART VCP Driver Installation
The target board includes a Silicon Labs CP210x USB-to-UART Bridge Controller. Device drivers for the CP210x
need to be installed before the PC software can communicate with the MCU through the UART interface.
Download the latest drivers from the website (www.silabs.com/vcpdrivers).
1. Download the drivers from the website and unzip the files to a location and run the appropriate installer for
the system (x86 or x64).
2. Accept the license agreement and follow the steps to install the driver on the system. The installer will let
you know when your system is up to date. The driver files included in this installation have been certified by
Microsoft.
3. To complete the installation process, connect the included USB cable between the host computer and the
USB connector (J9) on the target board. Windows will automatically finish the driver installation.
Information windows will pop up from the taskbar to show the installation progress.
If needed, the driver files can be uninstalled by selecting Windows Driver Package—Silicon
Laboratories... option in the Programs and Features window.
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5. C8051F970 Target Board Overview
The C8051F970 target board enables application development on the C8051F97x MCU device family. Figure 4
and Figure 5 highlight the C8051F970 target board features.
Figure 4. C8051F970 Target Board Features—Front
Potentiometer
Push-Button Switches
USB Connector
for VCP
Power Adapter
Debug Connector
Reset Button
LEDs
VCP-Enabled LED
Power LED
Current Measure Jumper Port Access
VDD Select Switch
LEDs
Capacitive Sense
Slider
Capacitive Sense
Button Matrix CR2032 Battery
Holder
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Figure 5. C8051F970 Target Board Features—Back
5.1. Push-Button Switches and LEDs (S1-2, DS8-13)
The C8051F970 target board has two push-button switches and six LEDs. The switches are normally open and pull
the pin voltage to ground when pressed. The LEDs connect to VDD through a current-limiting resistor and turn on
when the corresponding port pin is low.
Each pin has a zero ohm resistor that can be used to disconnect the switches and LEDs from the GPIO pins.
Table 1. Switch and LED Pin Descriptions
MCU Pin Function
P1.2 Red LED DS8 (LED12)
P1.3 Red LED DS9 (LED13)
P1.4 Red LED DS10 (LED14)
P1.6 Red LED DS11 (LED16)
P0.5 Red LED DS12 (LED05)
P1.5 Red LED DS13 (LED15)
P0.4 Switch S1 (BTN04)
P0.3 Switch S2 (BTN03)
External Oscillator
Components
CP210x USB-to-
UART VCP Bridge
Optional Pin
Isolation Resistors
AAA Battery
Holder
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5.2. Potentiometer (R12)
The potentiometer is available on P5.0. To use the potentiometer, install a shorting block on JP5 to connect P5.0 to
the potentiometer.
The potentiometer is referenced to P0.0, which is the voltage reference pin. Since the voltage reference can only
source ~250 µA, the simplest way to use the potentiometer is to turn on the P0.0 driver and set it to a logic high
using the port registers. The most accurate way to use the potentiometer is to externally connect P0.0 to VDD.
5.3. Capacitive Sense Buttons (CS20-27, CS30-37, CS40-47)
The capacitive sensing buttons demonstrate the C8051F970 Capacitive Sense module for use with buttons and
sliders. More information on the capacitive sense library can be found in 2.3. "Capacitive Sense‚" on page 2.
5.4. Power (SW1, J1, and J2)
The VDD power supply has three power options: on-board +3.3 V or +1.8 V regulator power, battery power, or off.
The VDD Select switch (SW1) is used to select between the two options.
The +3.3 V or +1.8 V regulator power option is the upper VREG position and allows the board to be powered from
a diode-OR of three power sources: 9 V Power Adapter (P1), the USB connector (J9), or the USB Debug Adapter
(H8). Once the VDD Select switch is in the VREG position, the VREG Select header (J1) selects between +3.3 V
or +1.8 V.
The middle VBATT option allows the board to be powered from either two AAA batteries (BH1) or a CR2032 coin
cell (BH2). When the VDD Select switch is in the VBATT position, J2 selects between a CR2032 or two AAA
batteries
The bottom OFF option disconnects the board power.
5.5. Power LED (D6)
The blue power LED provides visual feedback when the board is powered through USB, the 9 V power adapter, or
the USB Debug Adapter. This LED is not tied to the battery power net to conserve energy. The power LED
indicates that power is available on the board and the VDD Power Select switch must be configured properly to
power the MCU.
5.6. Power Measurement Jumper (JP3)
The power measurement jumper (JP3) allows for easy access to measure the VDD current of the MCU. The
shorting block for this header is populated by default. The side labeled VMCU is the side isolated to the
C8051F970 MCU. To measure the supply current, remove the corresponding shorting block and connect a current
measurement device across the unpopulated header.
The voltage supply prior to the jumper is the VDD net, which supplies all of the external LEDs, switches, USB
COM, and reset pull-up. The VDD_MCU net after the jumper only connects to the MCU.
5.7. Debug Header (H8)
The shrouded 10-pin debug header supports the Silicon Labs USB Debug Adapter. This connector provides a C2
debug connection to the C8051F970 on the target board.
5.8. Reset Button (S3)
The reset push-button switch is to the right of the debug header (H8). Pushing this button will always reset the
MCU. Note that pushing this button while the IDE is connected to the MCU will result in the IDE disconnecting from
the target.
5.9. LED Supply (JP4)
The LED supply separates the LED power from the rest of the board. Disabling the LEDs removes their power
consumption without having to modify firmware.
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5.10. I2C Slave (H7)
The I2C Slave header provides ground, SDA, and SCL to enable connection to another board with an I2C master.
A 4.7 kΩpull-up is populated by default on both SDA and SCL.
5.11. External Clocks (U6, Y1, Y2)
The C8051F970 target board is equipped with a Silicon Labs Si504 programmable CMEMS oscillator and two
crystal footprints Y1 and Y2. Y1 is a 25 MHz crystal that is populated by default. More information on the Si504 can
be found on the Silicon Labs CMEMS website: www.silabs.com/cmems.
5.12. UART Connection Options (JP1-2, U5)
The target board features a USB virtual COM port (VCP) UART connection via the standard USB connector (J9).
The VCP connection uses the CP210x USB-to-UART bridge chip (U5). The GPIO pins connected to the CP210x
device can be enabled or disabled through the JP1 and JP2 headers. Table 2 shows the GPIO pins that are routed
to the CP210x.
5.13. Port Pin Headers (H1-6)
All of the MCU port pins are available on the 0.100-inch headers on target board. Each connector provides
connections to each port, VDD, and ground. Any unused pins on the Port 5 header are not connected. Some of
these port pins are shared with other functions on the board and may be modified as explained in Section 5.14.
Table 2. CP210x Controlled GPIO Pins
MCU Pin COM Function
P0.1 UART Transmit
P0.2 UART Receive
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5.14. MCU Port Pin Connections
Table 3 summarizes all functions connected to each pin on the C8051F970 MCU in the target board.
Table 3. MCU Pin Functions
MCU Pin Signal MCU Pin Signal
P0.0 VREF Port Pin Header P2.7 CS slider Port Pin Header
P0.1 VCP_RX Port Pin Header P3.0 CS button Port Pin Header
P0.2 VCP_TX Port Pin Header P3.1 CS button Port Pin Header
P0.3 S1 switch Port Pin Header P3.2 CS button Port Pin Header
P0.4 S2 switch Port Pin Header P3.3 CS button Port Pin Header
P0.5 LED05 Port Pin Header P3.4 CS button Port Pin Header
P0.6 RTC crystal P3.5 CS button Port Pin Header
P0.7 RTC crystal P3.6 CS button Port Pin Header
P1.0 External Oscillator
(XTAL1) Port Pin Header P3.7 CS button Port Pin Header
P1.1 External Oscillator
(XTAL2) Port Pin Header P4.0 CS button Port Pin Header
P1.2 LED12 Port Pin Header P4.1 CS button Port Pin Header
P1.3 LED13 Port Pin Header P4.2 CS button Port Pin Header
P1.4 LED14 Port Pin Header P4.3 CS button Port Pin Header
P1.5 LED15 Port Pin Header P4.4 CS button Port Pin Header
P1.6 LED16 Port Pin Header P4.5 CS button Port Pin Header
P1.7 Si504 programming pin Port Pin Header P4.6 CS button Port Pin Header
P2.0 CS button Port Pin Header P4.7 CS button Port Pin Header
P2.1 CS button Port Pin Header P5.0 Potentiometer Port Pin Header
P2.2 CS button Port Pin Header P5.1 Port Pin Header
P2.3 CS button Port Pin Header P5.2 C2D Port Pin Header
P2.4 CS slider Port Pin Header P6.0 I2C Slave SCL Port Pin Header
P2.5 CS slider Port Pin Header P6.1 I2C Slave SDA Port Pin Header
P2.6 CS slider Port Pin Header
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5.15. Shorting Blocks: Factory Defaults
The C8051F970 target board comes from the factory with pre-installed shorting blocks on several headers.
Figure 6 shows the positions of the factory default shorting blocks.
Figure 6. Shorting Blocks: Factory Defaults
By default, a shorting block is installed in the following locations:
J1 (VREG Select): +3.3V connected to VREG
J2 (VBAT Select): CR2032 connected to VBATT
JP1: P0.1 connected to VCP_RX
JP2: P0.2 connected to VCP_TX
JP3: VDD connected to VDD_MCU
JP4: VDD connected to VDD_LED
JP5: P5.0 connected to Potentiometer
In addition, the VDD Select switch is in the OFF position by default.
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6. Power Measurement
The C8051F970 MCU card includes a power measurement header JP3 for MCU power measurement purposes.
The VDD_MCU supply on top of the header connects only to the MCU on the board. The VDD supply on the
bottom of the JP3 header powers the external LEDs, switches, reset switch, potentiometer, and VCP COM port.
6.1. Measuring Power with Fixed VDD
To measure the power of the C8051F970 MCU using the target board at a fixed 3.3 V or 1.8 V:
1. Connect a USB Debug Adapter to the 10-pin shrouded debug connector (H8).
2. Remove the shorting blocks from the COM port pins (JP1 and JP2) and the potentiometer (JP5).
3. Remove the JP3 power measurement shorting block.
4. Connect a multimeter across (positive side on the bottom pin) the JP3 header.
5. Move the J1 shorting block to either the +3.3V–VREG or the VREG–+1.8V position.
6. Move the VDD Select switch (SW1) to the upper VREG position.
7. Connect the 9 V power adapter to POWER (P1).
8. Download the code to the board.
9. Measure the power of the device.
Figure 7. C8051F970 Power Measurement Configuration— Fixed VDD
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6.2. Measuring Power with Varying VDD
To measure power with a varying VDD:
1. Connect a USB Debug Adapter to the 10-pin shrouded debug connector (H8).
2. Remove the shorting blocks from the COM port pins (JP1 and JP2) and the potentiometer (JP5).
3. Remove the JP3 power measurement shorting block.
4. Connect a multimeter across (positive side on the bottom pin) the JP3 header.
5. Remove the J1 shorting block.
6. Move the VDD Select switch (SW1) to the upper VREG position.
7. Connect a power supply to VREG on the J1 header (middle).
8. Download the code to the board.
9. Measure the power of the device.
Note: The pull-up resistor on /RST is powered by the VDD net, which is separated from the VDD_MCU net with the power
measurement shorting block (JP3) removed. Powering the MCU using VDD_MCU without powering the VDD net may
prevent Simplicity Studio from communicating with the MCU.
Figure 8. C8051F970 Power Measurement Configuration—Varying VDD
7. Known Board Issues
There are no known issues with Revision 2.0 of the C8051F970 target board.
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8. Schematics
5 5
4 4
3 3
2 2
1 1
HEADERS
PIN ASSIGNMENT
DEBUG EXTERNAL CLOCK REVISION HISTORY
003 1/31/2014 - Cleaned up BoM 002 9/3/2013 - Modified part names for cleaner silkscreen - Cleaned up part names 001 7/12/2013 - Original Release
MCU
VDD VDD VDD VDD
5V_DBA
VDD
VDD_MCU
VDD VDD
VDD
VDD VDD
P4.7 P4.6 P4.5 P5.1 P5.0 P0.0
P5.2/C2D RST/C2CK
P3.0 P2.4 P2.5 P2.6 P2.7 P2.3 P2.2 P2.1 P2.0 P1.7
P3.3
P3.2
P3.1
P3.5
P3.4
P4.0
P3.7
P3.6
P4.2
P4.1
P4.3
P4.4
P1.4
P1.5
P1.6
P1.2
P1.3
P0.7
P1.0
P1.1
P6.1
P0.6
P6.0
P2.5 P2.7 P2.3 P2.1
P1.4 P1.6 P1.2 P3.2 P3.4 P3.6 P0.0 P0.2 P0.4
P1.4 P1.5
P0.5
P0.3 P0.2 P0.4 P0.1
P0.0 P0.3 P0.2 P0.1 P1.6 P1.2 P1.3 P0.6 P0.7
VCP_RX VCP_TX
P1.0 P1.1
P6.0
RST/C2CK
P1.0_P
XTAL2
XTAL1 XTAL2 P1.1_P P1.0_P
P0.4
XTAL1
SI504_C1D
BTN0 BTN1 LED2 LED4 LED0 SI504_C1D LED3 LED1 TBTN_CS1 TBTN_CS2
P2.2 P2.3 TBTN_CS4
TBTN_CS3
P2.4 P2.5 P2.6
TBTN_CS11
P3.7 P4.1 P4.0
TSLIDER_CS0 TSLIDER_CS1 TSLIDER_CS2 TSLIDER_CS3 TBTN_CS5 TBTN_CS6 TBTN_CS7 TBTN_CS8 TBTN_CS9 TBTN_CS10 TBTN_CS12 TBTN_CS13 TBTN_CS14
P3.4 P2.7 P3.1 P3.0 P3.2 P3.3 P3.5 P3.6
ADC0 TBTN_CS19P4.6
P6.1 P6.0 P5.0
TBTN_CS15
P4.3 P4.5 P4.4
TBTN_CS16 TBTN_CS17 TBTN_CS18
P4.2
P2.1 P2.0 P1.7
TBTN_CS20P4.7 I2C_SDA I2C_SCL
I2C_SDA
I2C_SCL
P0.5 LED5
P3.0 P2.2 P2.4 P2.6 P2.0 P4.2 P4.4 P4.6 P4.0
P5.2/C2D
P5.0
P0.5 P6.1 P0.3 P0.1 P1.5 P1.7 P1.3 P1.1_P P3.5 P3.7 P3.3 P3.1 P4.5 P4.7 P4.3 P4.1 RST/C2CK P5.1
P5.2/C2D
VDD_VREF
Title Size Document Number R Date: Sheet of
400 W Cesar Chavez Austin, TX 78701
C8051F970-TB C8051F970 Target Board
B
13Friday, January 31, 2014
Title Size Document Number R Date: Sheet of
400 W Cesar Chavez Austin, TX 78701
C8051F970-TB C8051F970 Target Board
B
13Friday, January 31, 2014
Title Size Document Number R Date: Sheet of
400 W Cesar Chavez Austin, TX 78701
C8051F970-TB C8051F970 Target Board
B
13Friday, January 31, 2014
JP1
R3 10M
SH24 0 SH17 0
C1 4.7uF
SH4 0
SH8 0 SH32 0
SH11 0
JP2
R17 4.7K
SH40 0
SH19 0
H5
1
122
3
344
5
566
7
788
9
910 10
SH28 0 SH26 0
H4
1
122
3
344
5
566
7
788
9
910 10
SH34 0 SH5 0
Y1
32.768KHz
C4
20pF
SH25 0 SH21 0 SH12 0 SH15 0 SH35 0 SH37 0
R1 1K
SH6 0 SH30 0
H2
1
122
3
344
5
566
7
788
9
910 10
C2
0.1uF
U1 C8051F970
TX26/AM04/P0.4
1
RX00/AM51/P5.1
8
TX27/AM03/P0.3
2
TX28/AM02/P0.2
3
TX29/AM01/P0.1
4
TX30/VREF/AM00/P0.0
5
C2D/TX32/AM52/P5.2
6
RST/C2CK
7
RX01/AM50/P5.0
9
RX02/AM47/P4.7
10
PX03/AM46/P4.6
11
PX04/AM45/P4.5
12
RX05/AM44/P4.4
13
RX06/AM43/P4.3
14
RX07/AM42/P4.2
15
PX08/AM41/P4.1
16
RX12/TX01/AM35/P3.5
20
RX13/TX02/AM34/P3.4
21
RX14/TX03/AM33/P3.3
22
RX15/TX04/AM32/P3.2
23
RX11/TX00/AM36/P3.6
19 RX09/AM40/P4.0
17
TX05/AM31/P3.1
24
TX11/AM23/P2.3 30 TX07/AM27/P2.7 26 TX09/AM25/P2.5 28 TX06/AM30/P3.0 25 TX08/AM26/P2.6 27 TX10/AM24/P2.4 29
TX18/AM14/P1.4 39
GND 32
TX19/AM13/P1.3 40
TX12/AM22/P2.2 31
TX17/AM15/P1.5 38
TX16/AM16/P1.6 37
TX13/AM21/P2.1 34
RX10/AM37/P3.7
18
TX15/AM17/P1.7 36
VDD 33
TX14/AM20/P2.0 35
EPAD 49
TX20/AM12/P1.2 41
TX21/XTAL2/AM11/P1.1 42
TX22/XTAL1/AM10/P1.0 43
TX23/XTAL4/AM07/P0.7 44
TX24/XTAL3/AM06/CNVSTR/P0.6 45
SDA/P6.1 46
SCL/P6.0 47
TX25/MULTI/AM05/P0.5 48
H7
1 2 3
SH23 0 SH13 0
R2 0
SH1 0 H6
1
122
3
344
5
566
7
788
9
910 10
U2 32kHz
C1D
1
GND
2CLK 3
VDD 4
SH36 0
H8 DEBUG
1
122
3
344
5
566
7
788
9
910 10
SH18 0
S3RESET
SH14 0
SH2 0 SH20 0
SH7 0
SH16 0 SH29 0
H3
1
122
3
344
5
566
7
788
9
910 10
Y2 25MHz
H1
1
122
3
344
5
566
7
788
9
910 10
SH3 0
SH22 0
SH9 0 SH39 0 SH38 0
C3 1uF
C5 20pF
R16 4.7K
Figure 9. C8051F970 Target Board Schematic (Revision 2.0) (1 of 3)
Not Recommended for New Designs

C8051F970DK-UG
Rev. 0.1 17
54321
POWER [SUPPLIED] USB-UART
POWER [BATTERY]
POWER SELECT
VUSB
5V_DBA
3.3V
1.8V
VUSB
VDD
VREG
VBATT
VDD
VDD VDD_LED
VDD_MCUVDD
CR2032 2x_AAA
VIN_REG
VIN_REG VIN_REG
VREG1.8V
3.3V
CR2032
VBATT
2x_AAA
VCP_3.3V
VCP_3.3V
VUSB
VCP_RX
VCP_TX
Title Size Document Number
400 W Cesar Chavez Austin, TX 78701
C8051F970 MCU Board
Title Size Document Number
400 W Cesar Chavez Austin, TX 78701
C8051F970 MCU Board
Title Size Document Number
400 W Cesar Chavez Austin, TX 78701
C8051F970 MCU Board
D1
STPS140Z
J3
+V
1
D-
2
D+
3
GND
4
SH
5
SH
6
D3
STPS140Z
C14
10uF
D7 SUSP
C16 0.1uF
TP9
NI
C9 1uF
J1
1 2 3
C10 1uF
P1 Power Jack 5V-12V DC
3 2 1
J2
I_BATT
1 2 3
C7
10uF
R14 1K TP10
NI
C8 0.1uF
U5
CP2103
VDD 6
VIO 5
REGIN 7
GND
2
RESET
9SUSP 11
SUSP 12
VBUS 8
D+ 3
D- 4
CTS
22 RTS 23 DSR 26
RXD
24
DTR
27
TXD
25
DCD
28 RI
1
GPIO.3 16 GPIO.2 17 GPIO.1 18 GPIO.0 19
EPAD
29
NC 10 NC 13
NC
14
NC
15
NC
20
NC
21
TP11
NI
BH2
20mm BATTERY HOLDER
POS 1 POS 3
NEG 2
U3 LD1117AS33TR
GND
1
IN
3OUT 2
D4 15V
D2
STPS140Z
JP4
TP12
NI
C6 0.1uF
D5
SP0503BAHT
U4 LD1117AS18TR
GND
1
IN
3OUT 2
CTS
NI
C11
1uF
R5 1K
SW1
1 2 3 4
D6 BLUE
R4 1K
C12 0.1uF
BH1
2CELL AAA
NEG
1POS 2
C15 0.1uF
RTS
NI
JP3
C13 10uF
Figure 10. C8051F970 Target Board Schematic (Revision 2.0) (2 of 3)
Not Recommended for New Designs

C8051F970DK-UG
18 Rev. 0.1
5 5
4 4
3 3
2 2
1 1
USER CONTROL
TOUCH SLIDER with LEDs
TOUCH GRID
TESTPOINTS
VDD_LED
VDD
VDD
VDD_LED
BTN0 BTN1
TSLIDER_CS0
LED0 LED1 LED2 LED3
LED4
TSLIDER_CS2 TSLIDER_CS3 TSLIDER_CS1
ADC0
TBTN_CS20
TBTN_CS5 TBTN_CS10
TBTN_CS15
TBTN_CS1 TBTN_CS6
TBTN_CS11 TBTN_CS16
TBTN_CS2 TBTN_CS7
TBTN_CS12 TBTN_CS17
TBTN_CS3 TBTN_CS8
TBTN_CS13 TBTN_CS18
TBTN_CS4 TBTN_CS9
TBTN_CS14 TBTN_CS19
LED5
VDD_VREF
Title Size Document Number Rev Date: Sheet of
400 W Cesar Chavez Austin, TX 78701
C8051F970-TB 2.0 C8051F970 MCU Board
B
33Friday, January 31, 2014
Title Size Document Number Rev Date: Sheet of
400 W Cesar Chavez Austin, TX 78701
C8051F970-TB 2.0 C8051F970 MCU Board
B
33Friday, January 31, 2014
Title Size Document Number Rev Date: Sheet of
400 W Cesar Chavez Austin, TX 78701
C8051F970-TB 2.0 C8051F970 MCU Board
B
33Friday, January 31, 2014
1 2 3 4
CS22
1
CS46
1
TP2
NI
CS44
1
HW8
R9 750
TP1
NI
CS20
1
S1
BTN04
JP5
CS33
1
MH4
1
CS35
1
D9
TP3
NI
GR1
MH1
1
CS31
1
HW5
CS40
1
R6 750
TP4
NI
GR2
CS30
1
HW1
HW6
D11
CS23
1
TP6
NI
CS36
1
CS21
1
CS45
1
HW2
D12
D8
HW3
R10 750
CS34
1
MH2
1
R11
10K
13
2
R12 1K
CS43
1
CS32
1
D13
CS47
1
TP7
NI
HW4
R15 750
R8 750
HW7
TP5
NI
R13 1K
CS41
1
TP8
NI
CS37
1
CS42
1
MH3
1
D10
R7 750
S2
BTN03
Figure 11. C8051F970 Target Board Schematic (Revision 2.0) (3 of 3)
Not Recommended for New Designs

C8051F970DK-UG
Rev. 0.1 19
9. Bill of Materials
Table 4. C8051F970 Target Board Bill of Materials
Reference Part Number Source Description
BH1 2468 Keystone Electronics 2 cell AAA
BH2 BAT-HLD-001 Linx Technologies Inc. 20 mm CR2032 battery holder
C1 C0603X5R6R3-475K Venkel 4.7 µF, 6.3 V ±10% 0603
C2, C6, C8,
C12, C15, C16 C0603X7R100-104K Venkel 0.1 µF, 10 V ±10% 0603
C3, C9, C10,
C11 C0603X7R100-105K Venkel 1 µF, 10 V ±10% 0603
C7, C13, C14 C0805X5R160-106K Venkel 10 µF, 16 V ±10% 0805
D1, D2, D3 STPS140Z ST Semiconductor STPS140Z 1.0A 40V SOD-123
D4 MMSZ5245BT1 On Semi 15V 500mW 15V 5% SOD-123
D5 SP0503BAHTG Littlefuse USB ESD diodes 300mW 20V SOT143
D6, D7 LTST-C190TBKT Lite-On Technology
Corp. Blue LED 0603
D8, D9, D10,
D11, D12, D13 SML-LX0603IW Lumex Inc. Red 30 mA 0603
H1, H2, H3, H4,
H5, H6 TSW-105-07-T-D Samtec 5x2 header
H7, J1, J2 TSW-103-07-L-S Samtec 1x3 header
H8 5103309-1 Tyco 5x2 Shrouded Header
HW1, HW2,
HW3, HW4 1902D Keystone Electronics standoff
HW5, HW6,
HW7, HW8 NSS-4-4-01 Richco Plastic Co 4-40 screws
J3 614 004 161 21 WURTH USB TYPE B
JP1, JP2, JP3,
JP4, JP5 TSW-102-07-T-S Samtec 1x2 jumper
JS1, JS2, JS3,
JS4, JS5, JS6,
JS7
SNT-100-BK-T Samtec Jumper Shunt
P1 RAPC722X Switchcraft Inc. Power Jack 5A
R1, R4, R5,
R12, R13, R14 CR0603-10W-1001F Venkel 1 k, 1/10 W ±1% 0603
R11 RV100F-30-4K1B-B10K-B301 Alpha (Taiwan) 10 k, 0.03 W 30% 10 mm thumbwheel
potentiometer
R16, R17 CR0603-10W-472J Venkel 4.7 k, 1/10W ±5% 0603
Not Recommended for New Designs

C8051F970DK-UG
20 Rev. 0.1
R2, SH1, SH2,
SH3,SH4,SH5,
SH6,SH7,SH8,
SH9, SH11,
SH12, SH13,
SH14, SH15,
SH16, SH17,
SH18, SH19,
SH20, SH21,
SH22, SH23,
SH24, SH25,
SH26, SH28,
SH29, SH30,
SH32, SH34,
SH35, SH36,
SH37, SH28,
SH29, SH30,
SH32, SH34,
SH35, SH36,
SH37, SH38,
SH39, SH40
CR0603-16W-000 Venkel 0 ,1A 0603
R6, R7, R8, R9,
R10, R15 CR0603-16W-7500F Venkel 750 , 1/10 W ±1% 0603
S1, S2, S3 EVQ-PAD04M PANASONIC CORP momentary switch
SW1 OS103012MU1QP1 C&K 3 position slide switch
U1 C8051F970-GM Silicon Labs C8051F970 QFN48
U2 504PCAA001033DAG Silicon Labs Programmable CMEMS Oscillator
U3 LD1117AS33TR ST Semiconductor 3.3 V LDO SOT223
U4 LD1117AS18TR ST Semiconductor 1.8 V 1A SOT223
U5 CP2103-GM Silicon Labs CP2103 USB to UART bridge (QFN28)
Y1 ABS07-32.768KHZ-7 Abracon Corporation 32.768 kHz crystal
Components Not Installed
C4, C5 C0603C0G500-20K Venkel 20 pF, 50 V ±10% 0603 (NI)
R3 CR0603-16W-1005F Venkel 10 M1/16 W ±1% 0603 (NI)
TP1, TP2, TP3,
TP4, TP5, TP6,
TP7, TP8, TP9,
TP10, TP11,
TP12, TP13,
TP14
151-205-RC Kobiconn Testpoint (NI)
Y2 ECS-250-18-4X-F ECS 25 MHz HC-49/US (NI)
Table 4. C8051F970 Target Board Bill of Materials (Continued)
Reference Part Number Source Description
Not Recommended for New Designs