Rev 0; 10/05
MAXQ3120 Evaluation Kit
General Description
The MAXQ3120 evaluation kit (EV kit) is a proven plat-
form to conveniently evaluate the capabilities of the
MAXQ3120 dual analog-to-digital converter (ADC)
microcontroller. The kit contains the MAXQ3120 with
the ADC inputs and spare GPIO pins brought out to
headers, a JTAG programming interface, an on-board
3.3V power supply, and a 3.5 digit LCD. With the
included serial-to-JTAG interface board, JTAG cable,
and an RS-232 cable connected to a Windows
®
-com-
patible computer, the kit provides a completely func-
tional system ideal for evaluating the MAXQ3120.
Features
♦
Easily Loads Code Using Bootstrap Loader and
Serial-to-JTAG Interface Board
♦
JTAG Interface Provides In-Application
Debugging Features
Step-by-Step Execution Tracing
Breakpointing by Code Address, Data Memory
Address, or Register Access
Data Memory View and Edit
♦
Static 3.5 Digit LCD Display Driven Directly by
MAXQ3120
♦
On-Board 3.3V Power-Supply Regulator
♦
EV Kit Board can be Powered Directly Over JTAG
Interface or from DC Power Supply
♦
Indicator LED Driven from Port Pin P0.6
♦
Pushbuttons for Reset, Three GPIO Inputs and
One External Interrupt
♦
RS-232 Interface Included on Serial Port 1
♦
Included Full Board Schematics Provide a
Convenient Reference Design
MAXQ is a trademark of Maxim Integrated Products, Inc.
Windows is a registered trademark of Microsoft Corp.
POWER LED
Evaluates: MAXQ3120
Evaluation Kit Contents
♦
MAXQ3120 Evaluation Kit Board with Processor
and 8MHz Crystal Installed
♦
Serial-to-JTAG (MAXQJTAG) Interface Board,
Serial Cable, and JTAG Cable
♦
MAXQ3120 Evaluation Kit CD
♦
Third-Party Compiler Tools Evaluation CD(s)
Ordering Information
PART
MAXQ3120-KIT
DESCRIPTION
MAXQ3120 EV Kit Board
MAXQ3120-FFN+
USER SERIAL PORT
LCD
PROTOTYPE AREA
SERIAL DEBUG
PORT
RESET
JTAG INTERFACE
CABLE
5V POWER CONNECTOR
JTAG INTERFACE
BOARD
Figure 1. MAXQ3120 Evaluation Kit Setup
______________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
MAXQ3120 Evaluation Kit
Evaluates: MAXQ3120
Component List
DESIGNATION
C1
C2
C3
C4, C5, C6, C7
C8–C18
C21
C22, C23
D3
J4
JP1
JP2, JP5
JP3
QTY
1
1
1
4
11
1
2
1
1
1
2
1
DESCRIPTION
100µF tantalum
capacitor
100nF tantalum
capacitor
47µF tantalum
capacitor
1µF ceramic
capacitors (0805)
100nF ceramic
capacitors (0805)
10nF ceramic
capacitor (0805)
4.7µF capacitors
(0805)
SUPPLIER/
PART NUMBER
Nichicon
F931A107MNC
Nichicon
F921V104MAA
Nichicon
F931A476MCC
Generic
Generic
Generic
S1–S5
Generic
U1
1
5
SPST N/O
pushbutton
MAX1658
350mA Linear
regulator
MAXQ3120
Dual ADC
microcontroller
MAXQ3160
Multiprotocol
transceiver
32.768kHz, 6pF
crystal
DESIGNATION
JP9
L1
R2–R7, R14,
R15, R16
R8
R10
R18
QTY
1
1
9
1
1
1
DESCRIPTION
SUPPLIER/
PART NUMBER
1 x 4 header, 0.1in 3M
spaced
929834-02-04
56µH inductor
10kΩ ±5%, 1/8W
resistors (0805)
470Ω ±5%, 1/8W
resistor (0805)
0Ω shunt
2.2Ω ±5%, 1/8W
resistor (0805)
J.W. Miller
78F560J
Generic
Generic
—
Generic
Omron
B3W-
1052BYOMZ
Maxim
MAX1658ESA
Maxim
MAXQ3120-FFN
Maxim
MAX3160CAP
Epson
C-002RX
32.7680K-E
Citizen
HC49US8.000M
ABJ
Surface-mount red
Generic
LED (0805)
RS-232 DB9
female connector
AMP
747844-4
U3
1
1 x 2 header, 0.1in 3M
spaced
929834-02-02
1 x 3 headers,
0.1in spaced
3M
929834-02-03
U5
1
2 x 5 header, 0.1in 3M
spaced
929836-02-05
Static 3V–5V,
3-1/2 digit LCD
Lumex
LCD-
S3X1C50TR/A
X1
1
JP6
1
X2
1
8MHz crystal
TEST MODE SELECT
TEST CLOCK
WINDOWS
PC
SERIAL
(COM)
PORT
SERIAL-TO-JTAG
INTERFACE
ADAPTER
TEST DATA IN
MAXQ3120
TEST DATA OUT
RS-232
INTERFACE
JTAG/TAP
INTERFACE
Figure 2. MAXQ3120 Serial-to-JTAG Interface
2
_____________________________________________________________________
MAXQ3120 Evaluation Kit
Evaluates: MAXQ3120
+3.3V
FIXED
POWER SUPPLY
3.5 DIGIT x 7-SEGMENT LCD
8MHz CRYSTAL
PB1
RESET
WINDOWS PC
WITH SERIAL
(COM) PORT
(USER SUPPLIED)
MAXQ3120
RS-232
J1
SERIAL
SERIAL-
TO-
JTAG
INTERFACE
BOARD
J2
JH3
JTAG
CONNECTOR
JTAG
CONNECTOR
32kHz CRYSTAL
(FOR REAL-TIME
CLOCK)
PB3
P0.6
PB2
JTAG
INTERFACE
POWER SUPPLY
5V DC
±5%
> 300mA
RS-232
INTERFACE
PB4
PROTOTYPING
AREA
J1
SERIAL
Figure 3. MAXQ3120 Evaluation Kit Functional Layout
Detailed Description
This EV kit must be used with the following documents:
• MAXQ3120 Data Sheet
(www.maxim-ic.com/MAXQ3120)
• MAXQ Family User’s Guide
(www.maxim-ic.com/MAXQUG)
• MAXQ312x User’s Guide Supplement
(www.maxim-ic.com/MAXQ3120UG)
The MAXQ3120 EV kit board is fully defined in the
included schematic. However, a short description of
the major components and connectors of the boards
follows.
Power Supplies
There are three ways to set up power supplies when
using the MAXQ3120 EV kit. The two boards that
require power supplies are the MAXQ3120 EV kit board
and the serial-to-JTAG interface board.
_____________________________________________________________________
3
MAXQ3120 Evaluation Kit
Evaluates: MAXQ3120
Running Both Boards from
Separate Power Supplies
To run each of the boards from its own power supply,
connect supplies as follows.
• Connect a 5V ±5% regulated DC wall supply to the
J2 power plug of the serial-to-JTAG interface board.
• Connect a 3.3V regulated bench supply to test points
V
CC
and GND on the MAXQ3120 EV kit board.
Note: When using two power supplies in this man-
ner, the JP3 jumper on the serial-to-JTAG board
must be DISCONNECTED.
Running Both Boards from
a Single Power Supply
If the serial-to-JTAG interface board is being used, a
single power supply can be used to power both boards
as follows.
• Connect a 5V ±5% regulated DC wall supply to the
J2 power plug of the serial-to-JTAG interface board.
• Connect the JH3 jumper on the serial-to-JTAG inter-
face board.
Note: Do not connect a power supply to the test
points on the MAXQ3120 EV kit when powering the
boards in this manner.
Running the MAXQ3120 EV Kit Board
from a Single Power Supply
If the MAXQ3120 has already been programmed using
the JTAG interface, it is possible to disconnect the seri-
al-to-JTAG board and power-up the MAXQ3120 EV kit
board on its own. This simply executes the previously
loaded firmware, with no possibility of in-application
load or debugging.
• Connect a 3.3V regulated bench supply to test points
V
CC
and GND on the MAXQ3120 EV kit board.
Internal Power Rail
If the MAXQ3120 EV kit is powered from the serial-to-
JTAG board, it generates a 3.3V internal power rail from
the 5V DC input power supply. This supply can be
used to provide up to 100mA to circuitry on the proto-
typing area.
Using the LCD
The LCD included on the MAXQ3120 EV kit is a static
(nonmultiplexed) 3V display with 3.5 digits of 7 seg-
ments each (Figure 4).
When the LCD controller is configured to static mode,
the display’s segments are memory mapped as noted
in Table 1. (Refer to Table 29 in the
MAXQ312x
Supplement
for more details.)
1A
2A
3A
X
Y
X
K
1F
1G
1B
C
O
L
1C
2F
2G
2B
3F
3G
3B
1E
2E
2C
3E
3C
DP2
1D
2D
DP3
3D
Figure 4. LCD Configuration
Table 1. LCD Memory Map (Static)
REGISTER
LCD0
LCD1
LCD2
LCD3
BIT 7
2G
3A
COL
BIT 6
1G
DP2
DP3
BIT 5
1F
2F
3G
BIT 4
1E
2E
3F
BIT 3
1D
2D
3E
BIT 2
1C
2C
3D
X
BIT 1
1B
2B
3C
K
BIT 0
1A
2A
3B
Y
4
_____________________________________________________________________
DVDD
VP50
VP50
1
GND
V
REF
4
RST 6
RST
IN3
IN6
IN7
U1
OUT5
5
OUT4
6
7
3
4
VCC5
GND
10
8
2
1
DVDD
JP3
P33
TCK
P30
P32
7
KEY
TDI
HEADER 2 x 5 (JTAG)
P31
9
3 TDO
5 TMS
1
P3[7..0]
TP11
+5V
TP14
DV
DD
MAX1658
2
SHDN
GND
8
SET
1
C1 1
100µF
10V 2
C2 1
0.1µF
10V 2
1
2
C3
4.7µF
10V
VBAT
JP9
JP1
P35
P34
3
SPARE GPIO, BATTERY
1
2
TP7
GND
TP8
GND
TP9
GND
TP10
GND
1
1
1
1
Figure 5. MAXQ3120 Evaluation Kit Power Schematics—Power, Headers (Sheet 1 of 4)
1
2
3
4
ADC INPUTS
R18
2.2Ω
DVDD
1
L1
56µH
1
2
C9
1
100nF
10V
2
C15 1
100nF
10V
2
C16
1
100nF
10V
2
C17 1
100nF
10V
2
C18
1
100nF
10V
2
C22
4.7µF
10V
1
R10
0Ω
2
1
2
C23
4.7µF
10V
1
2
C10
100nF
10V
1
2
C21
100nF
10V
2
AVDD
Evaluates: MAXQ3120
_____________________________________________________________________
AN1N
AN1P
ANON
ANOP
MAXQ3120 Evaluation Kit
5