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UG-176
ADuC7023 Evaluation Board User Guide
MicroConverter ADuC7023 Development System
FEATURES
2-layer printed circuit board (PCB), 4 inch × 5 inch form factor
USB power supply regulated to 3.3 V on board
USB-to-I
20-pin standard JTAG connector for programming/
Demonstration circuit
32.768 kHz watch crystal to drive the PLL clock
ADR291 2.5 V external reference chip
Reset/download/IRQ0 push buttons
Power indicator/general-purpose LEDs
Access to all ADC inputs and DAC outputs from external header;
Surface-mount and through-hole, general-purpose
The full evaluation kit also includes:
2
C programming interface on board
debugging
all device ports are routed to external header pins
prototype area
mIDAS-Link JTAG programming POD
CD containing evaluation software, including user
manuals, data sheets, example code, I2CWSD, and
evaluation compilers
USB cable
GENERAL DESCRIPTION
This user guide refers to the ADuC7023 evaluation boards
provided in the EVAL-ADuC7023QSPZ (32-lead LFCSP device
based) and the EVAL-ADuC7023QSPZ1 (40-lead LFCSP device
based) kits. These evaluation boards allow for the evaluation of
the MicroConverter® ADuC7023. The ADuC7023 contains an
ARM7TDMI core, 64 kB of Flash, 8 kB of SRAM, a 12-bit, 1 MSPS
SAR analog-to-digital converter (ADC), and 4 × 12-bit voltage
digital-to-analog converters (DACs), plus many other features.
These evaluation boards allow users to program the ADuC7023
via the JTAG or the I
source code through the JTAG interface.
In this user guide, all references to the physical orientation of
components on the boards are made with respect to a componentside view of the board with the prototype area appearing in the
bottom of the board.
The boards are laid out to minimize coupling between the analog
and digital sections of the board. To this end, the ground plane
is split with the analog section on the left side and a digital
plane on the right side of the board. The regulated 3.3 V power
supply is routed directly to the digital section and is filtered
before being routed into the analog section of the board.
2
C interfaces. Users may also debug their
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
Rev. 0 | Page 1 of 16
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UG-176 Evaluation Board User Guide
TABLE OF CONTENTS
Features .............................................................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Evaluation Board Features ............................................................... 3
Power Supply ................................................................................. 3
Evaluation Board, Schematics and Artwork ..................................8
Ordering Information .................................................................... 14
Bill of Materials ........................................................................... 14
Related Links ............................................................................... 15
Rev. 0 | Page 2 of 16
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Evaluation Board User Guide UG-176
(
A
3
EVALUATION BOARD FEATURES
POWER SUPPLY
Both boards can be directly powered via the mini-USB connector,
J1. Alternatively, an external 12 V to 5 V power supply can be
connected to the 2-pin header, J7, which is labeled POWER.
The pin beside the mini-USB connector is the power pin.
I2C PROGRAMMING INTERFACE
The ADuC7023 is connected to the USB connector via the
2
C-to-USB transceiver chip referenced as U5 on the PCB. The
I
interface allows direct connection to the PC via the USB port.
Connect the evaluation board to the PC via the USB port using
the mini-USB lead included in the evaluation package.
Prompts appear to install drivers for the new hardware, which
includes the following: Serial Converter A, Serial Converter B, and
the serial ports. The D2XX direct drivers can be found on the
FTDI website. These drivers are also included on the CD with the
evaluation kit.
Complete the following steps to install the drivers for the
FT2232H device on the evaluation board and to download a
hex file to the ADuC7023 internal flash via the I2CWSD
application provided with the evaluation software.
1. Select Install the software automatically (Recommended)
and Click Next > to complete the install (see Figure 1).
3. Click Configure and select the settings shown in Figure 3.
Figure 2. I2CWSD Dialog Box
9195-002
Figure 1. Found New Hardware Wizard Dialog Box
2. To connect to the Microcontroller, open the I2CWSD
application from the Windows® Start menu (see Figure 2).
This may also be downloaded from the ADuC7023 product
page on the Analog Devices, Inc., website. This I2CWSD is
different from the generic I2CWSD application that interfaces
to the USB-I2C/LIN-CONVZ dongle.
09195-003
Figure 3. I2CWSD Configure Options
4. Select the hex files location by clicking Browse.. and reset the
evaluation board. This is done by holding down the
SERIAL DOWNLOAD
button (S2), toggling the
button (S3), and releasing the
SERIAL DOWNLOAD
RESET
switch, which then resets the board (see ). Figure 4
ND S2 RELEASED(B) PUSH S2(C) PUSH S
(A) S3
S3
RESET = 1)S2(SERIAL
9195-001
DOWNLO AD = 1)
(D) RELEASE S3(E) RELEASE S2
S3
(RESET = 1)S2(SERIAL
Figure 4. Download Mode Entry Sequence
S3
(RESET = 1)S2(SERIAL
DOWNLOAD = 0)
DOWNLO AD = 0)
S3
(RESET = 1)S2(SERIAL
S3
(RESET = 0)S2(SERIAL
DOWNLO AD = 1)
DOWNLO AD = 0)
09195-004
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UG-176 Evaluation Board User Guide
5. Click Start in the I2CWSD dialog box to connect the
I2CWSD download software with the ADuC7023 bootloader
(see Figure 5).
Figure 7. Command to Enter to Run Reset_Ft2232h_Io.exe
Go to the directory where the Reset_Ft2232h_Io.exe utility is
copied on the PC (see Figure 7 and Figure 8).
9195-005
Figure 5. I2CWSD Application Showing a Valid ADuC7023 ID String Response
EMULATION INTERFACE
Nonintrusive emulation and download are possible on the
ADuC7023 via JTAG by connecting a JTAG emulator to the J4
connector.
9195-013
USING P0.4 AND P0.5 AS I2C PINS
The ADuC7023 evaluation boards use an I2C-to-USB transceiver
chip, the FT2232H, that allows the ADuC7023 to be programmed
directly over the USB interface without any need of an external
dongle. However, the FT2232H does drive the P0.4/P0.5 pins of
the ADuC7023 by default. To isolate these pins from the FT2232H,
run the Reset_Ft2232h_Io.exe utility, which can be downloaded
from the ADuC7023 product page on the Analog Devices website.
This utility configures the P0.4/P0.5 connection to the FT2232H as
input pins, which stops the FT2232H from driving these pins.
Execute this utility if the P0.4/P0.5 pins are intended for any use
other than interfacing with the PC via the USB transceiver.
Run the executable from the Command window, as shown in
Figure 6.
Figure 6. How to Open a Command Window
09195-014
Figure 8. Expected Text after Running Reset_Ft2232h_Io.exe
CRYSTAL CIRCUIT
The board is fitted with a 32.768 kHz crystal, from which the
on-chip PLL circuit can generate a 41.78 MHz clock.
EXTERNAL REFERENCE (ADR291E)
The external 2.5 V reference chip, U2, is provided on the
evaluation board to demonstrate the external reference option
of the ADuC7023.
RESET/DOWNLOAD/IRQ1 PUSH-BUTTONS
A reset push button is provided to allow users to reset the part
RST
manually. When pressed, the
to DGND. Because the
RST
pin of the is pulled
pin on the is Schmidttriggered internally, there is no need to use an external Schmidt
trigger on this pin.
When pressed, the IRQ1 push-button switch drives the P1.1 pin
high. This can be used to initiate an External Interrupt 1.
On the evaluation board, serial download mode can be easily
initiated by holding down the
SERIAL DOWNLOAD
(S2) while pressing and releasing the
shown in the section. Also, ensure
2
I
C Programming Interface
that Flash Address 0x80014 contains 0xFFFFFFFF.
09195-012
ADuC7023
ADuC7023
RESET
button (S3), as
push button
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Evaluation Board User Guide UG-176
POWER INDICATOR/GENERAL-PURPOSE LEDS
A power LED (D5) is used to indicate that a sufficient supply is
available on the board. A general-purpose LED (D2) is directly
connected to VDDIO and connected to P0.7 of the ADuC7023
through R18. When P0.7 is cleared, the LED turns on. When
P0.7 is set, the LED turns off.
ANALOG I/O CONNECTIONS
All analog I/O connections are connected to Header J3.
ADC0 and ADC1 are buffered using an AD8606 to evaluate
single-ended and pseudo differential mode. A potentiometer
can be connected to ADC0 buffered.
ADC3 and ADC2 can be buffered with a single-ended-todifferential op amp on board, with the AD8132 used to
evaluate the ADC in differential mode.
DAC1 can be used to control the brightness of the green LED, D1,
when connected via the S1 switch.
GENERAL-PURPOSE PROTOTYPE AREA
General-purpose prototype areas are provided at the bottom of the
evaluation board for adding external components as required in
the application. As can be seen from the layout, AVDD, AGND,
VDDIO, and DGND tracks are provided in this prototype area
(see the Evaluation Board, Schematics and Artwork section).
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UG-176 Evaluation Board User Guide
DIP SWITCH LINK OPTIONS
Table 1.
Option Function Use
S1-1 VREF Connects V
S1-2 VOCM Connects V
S1-3 POT
Connects POT output to the noninverting input of U4-A, the
input buffer for ADC0.
Slide S1-3 to the off position to disconnect POT from ADC0.
S1-4 ADC3 Connects ADC3, J3 (Pin 8), to B_ADC3.
S1-5 ADC3
Connects V+ output of the differential amplifier, U3, to the
ADC3 input.
S1-6 ADC2
Connects V− output of the differential amplifier, U3, to the
ADC2 input.
S1-7 ADC2 Not used Not used.
S1-8 DAC1 Connects DAC1 to D1 for the LED demonstration circuit. Slide S1-8 to the on position to connect DAC1 to D1.
Slide S1-8 to the off position to disconnect DAC1 from D1.
of the ADR291E to the V
OUT
of the ADR291E to VOCM.
OUT
REF
pin.
Slide S1-1 to the on position to connect V
to V
.
REF
Slide S1-1 to the off position to disconnect V
ADR291E from V
REF
.
Slide S1-2 to the on position to connect V
of the ADR291E
OUT
of the
OUT
of the ADR291E
OUT
to VOCM.
Slide S1-2 to the off position to disconnect V
OUT
of the
ADR291E from VOCM.
Slide S1-3 to the on position to connect POT to ADC0.
Slide S1-4 to the on position to connect ADC3, J3 (Pin 8), to
B_ADC3.
Slide S1-4 to the off position to disconnect ADC3, J3 (Pin 8),
from B_ADC3.
Slide S1-5 to the on position to connect the V+ output of the
AD8132 differential amplifier to ADC3.
Slide S1-5 to the off position to disconnect the V+ output of
the AD8132 differential amplifier from ADC3.
Slide S1-6 to the on position to connect the V− output of the
AD8132 differential amplifier to ADC2.
Slide S1-6 to the off position to disconnect the V− output of
the AD8132 differential amplifier to ADC2.
Rev. 0 | Page 6 of 16
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Evaluation Board User Guide UG-176
EXTERNAL CONNECTORS
ANALOG I/O CONNECTOR, J3
The analog I/O connector, J3, provides external connections for
all ADC inputs, reference inputs, and DAC outputs. The pinout
of the connector is shown in Ta ble 2.
Both evaluation board versions have the same pinout.
Table 2. Pin Functions for Analog I/O Connector, J3
Connector J4 provides a connection of the evaluation board to
the PC via a JTAG emulator.
MINI-USB INTERFACE CONNECTOR, J1
Connector J1 provides power and a simple connection of the
evaluation board to the PC via a USB cable provided with the
ADuC7023 development system.
DIGITAL I/O CONNECTOR, J2
The digital I/O connector, J2, provides external connections for
all GPIOs. The pinout of the connector is shown in Table 3 and
Table 4 for the 32-pin and 40-pin boards, with details of the pin
functions.
Table 3. Pin Functions for the Digital I/O Connector, J2, on the
32-Pin Evaluation Board
I2C refers to a communications protocol originally developed by Philips Semiconductors (now NXP Semiconductors).
ESD Caution
ESD (electrostatic discharge) sensitive device. Charged devices and circuit boards can discharge without detection. Although this product features patented or proprietary protection
circuitry, damage may occur on devices subjected to high energy ESD. Therefore, proper ESD precautions should be taken to avoid performance degradation or loss of functionality.
Legal Terms and Conditions
By using the evaluation board discussed herein (together with any tools, components documentation or support materials, the “Evaluation Board”), you are agreeing to be bound by the terms and conditions
set forth below (“Agreement”) unless you have purchased the Evaluation Board, in which case the Analog Devices Standard Terms and Conditions of Sale shall govern. Do not use the Evaluation Board until you
have read and agreed to the Agreement. Your use of the Evaluation Board shall signify your acceptance of the Agreement. This Agreement is made by and between you (“Customer”) and Analog Devices, Inc.
(“ADI”), with its principal place of business at One Technology Way, Norwood, MA 02062, USA. Subject to the terms and conditions of the Agreement, ADI hereby grants to Customer a free, limited, personal,
temporary, non-exclusive, non-sublicensable, non-transferable license to use the Evaluation Board FOR EVALUATION PURPOSES ONLY. Customer understands and agrees that the Evaluation Board is provided
for the sole and exclusive purpose referenced above, and agrees not to use the Evaluation Board for any other purpose. Furthermore, the license granted is expressly made subject to the following additional
limitations: Customer shall not (i) rent, lease, display, sell, transfer, assign, sublicense, or distribute the Evaluation Board; and (ii) permit any Third Party to access the Evaluation Board. As used herein, the term
“Third Party” includes any entity other than ADI, Customer, their employees, affiliates and in-house consultants. The Evaluation Board is NOT sold to Customer; all rights not expressly granted herein, including
ownership of the Evaluation Board, are reserved by ADI. CONFIDENTIALITY. This Agreement and the Evaluation Board shall all be considered the confidential and proprietary information of ADI. Customer may
not disclose or transfer any portion of the Evaluation Board to any other party for any reason. Upon discontinuation of use of the Evaluation Board or termination of this Agreement, Customer agrees to
promptly return the Evaluation Board to ADI. ADDITIONAL RESTRICTIONS. Customer may not disassemble, decompile or reverse engineer chips on the Evaluation Board. Customer shall inform ADI of any
occurred damages or any modifications or alterations it makes to the Evaluation Board, including but not limited to soldering or any other activity that affects the material content of the Evaluation Board.
Modifications to the Evaluation Board must comply with applicable law, including but not limited to the RoHS Directive. TERMINATION. ADI may terminate this Agreement at any time upon giving written notice
to Customer. Customer agrees to return to ADI the Evaluation Board at that time. LIMITATION OF LIABILITY. THE EVALUATION BOARD PROVIDED HEREUNDER IS PROVIDED “AS IS” AND ADI MAKES NO
WARRANTIES OR REPRESENTATIONS OF ANY KIND WITH RESPECT TO IT. ADI SPECIFICALLY DISCLAIMS ANY REPRESENTATIONS, ENDORSEMENTS, GUARANTEES, OR WARRANTIES, EXPRESS OR IMPLIED, RELATED
TO THE EVALUATION BOARD INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY, TITLE, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT OF INTELLECTUAL
PROPERTY RIGHTS. IN NO EVENT WILL ADI AND ITS LICENSORS BE LIABLE FOR ANY INCIDENTAL, SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES RESULTING FROM CUSTOMER’S POSSESSION OR USE OF
THE EVALUATION BOARD, INCLUDING BUT NOT LIMITED TO LOST PROFITS, DELAY COSTS, LABOR COSTS OR LOSS OF GOODWILL. ADI’S TOTAL LIABILITY FROM ANY AND ALL CAUSES SHALL BE LIMITED TO THE
AMOUNT OF ONE HUNDRED US DOLLARS ($100.00). EXPORT. Customer agrees that it will not directly or indirectly export the Evaluation Board to another country, and that it will comply with all applicable
United States federal laws and regulations relating to exports. GOVERNING LAW. This Agreement shall be governed by and construed in accordance with the substantive laws of the Commonwealth of
Massachusetts (excluding conflict of law rules). Any legal action regarding this Agreement will be heard in the state or federal courts having jurisdiction in Suffolk County, Massachusetts, and Customer hereby
submits to the pers onal jurisdiction and venu e of such courts. The United Nations Conventi on on Contracts for the Internation al Sale of Goods shall not apply to this Agreement and is expressly disclaimed.