Datasheet

MAX1270 EV Kit/EV System
2 _______________________________________________________________________________________
Evaluates: MAX1270/MAX1271/MAX127/MAX128
MAX1270 Evaluation System
The MAX1270 EV system operates from a user-sup-
plied +8V to +12V DC power supply. Windows 3.1/95
software running on an IBM PC interfaces to the EV sys-
tem board through the computer’s serial-communica-
tions port. The software can be operated with or without
a mouse. Refer to the Quick Start section for setup and
operating instructions.
MAX1270/MAX1271
Stand-Alone EV Kit
The MAX1270 EV kit provides a proven PC board layout
to facilitate evaluation of the MAX1270. Apply your sys-
tem’s ±12V power-supply rails to the OPAMP+ and
OPAMP- terminals. Connect GND to your system
ground return. The OPAMP+ input powers a MAX1615
linear regulator and a MAX6141 voltage reference. It
must be interfaced to appropriate timing signals for
proper operation.
Connect your three-wire interface to SCLK, DIN, DOUT,
and GND. Leave R3 and R4 open. If you do not drive
CS, install a 100Ω resistor at R5. If you do not drive
SHDN, install a 100Ω resistor at R2. Make sure JU1 is in
position 2-3 (factory setting). Refer to the MAX1270
data sheet for waveforms and timing requirements.
Evaluating the MAX127/MAX128
The MAX1270 EV board may be used to evaluate the
MAX127 or MAX128 with a user-supplied, 2-wire con-
troller and software. Replace U1 with the MAX127ACNG
or MAX128ACNG. Cut the default trace on the back of
the board under JU1 (marked with an arrow). Short pins 1
and 2 of jumper JU1. Connect your two-wire interface to
SCL, SDA, and GND. Install 100Ω resistors at R2, R3, R4,
and R5. With the address select pins pulled down by R3,
R4, and R5, the two-wire device address is 01010000 for
writing commands to the part and 01010001 for reading
data from the part. Refer to the MAX127 data sheet for
waveforms and timing requirements.
Note: The MAX1270 EV system software does not
support the MAX127 or MAX128.
Quick Start
Recommended Equipment
You will need the following equipment before you
begin:
• A small DC power supply, +8V to +12V at 200mA
Windows Application Program Files
Install/Uninstall Program Files
68HC16 Source Code Files
MAX1270 EV KIT Software
MAXADC.EXE
Application program that runs under
Window 3.1 or Windows 95
MAX1270.HLP Help file
MAX1270.DLL
MAXADC personality module for
MAX1270
MAXADC.INI Program settings file
MAX1270.C16
Software loaded into 68HC16
microcontroller
INSTALL.EXE Installs the EV kit files on your computer
INSTALL16.EXE Installs the EV kit files on your computer
UNINST.EXE
Removes the EV kit files from your
computer
UNINST32.EXE
Removes the EV kit files from your
computer
UNINST.INI Database for uninstall program
UN-MAXIM.PIF
Windows program information file for
uninstall
KIT1270.ASM
Main source code for the KIT1270.C16
program, provided for reference.
Compiled with Motorola 68HC Macro
Assembler, version 4.1. Maxim holds
the copyright but allows customers to
adapt the program for their own use
without charge.
EVKIT.ASM
Source code defining the program
interface with the Maxim 68HC16
module ROM (rev. 1)
UPGRADE1.INC
Source code adding enhanced services
(rev. 2) for the older Maxim 68HC16
module ROM (rev. 1)
QSPI.ASM
Source code defining the program
interface with the Motorola QSPI™
(Queued Serial Peripheral Interface)
GPT.ASM
Source code defining the program
interface with the Motorola GPT
peripheral. Provides general-purpose
I/O pins.
QSPI is a trademark of Motorola Corp.