3) Carefully connect the boards by aligning the 40-pin
header of the MAX1258 EV kit with the 40-pin con-
nector of the 68HC16MODULE-DIP module. Gently
press them together. The two boards should be
flush against one another.
4) Connect a +7V to +20VDC power source to the µC
module at the terminal block (J2) located next to
the ON/OFF switch (SW1), along the top-edge of
the µC module. Observe the polarity marked on the
board.
5) Connect the USBTO232 board to the
68HC16MODULE-DIP module if you have not done
so already.
6) The MAX1258 EV kit software should have already
been downloaded and installed in the USBTO232
Quick Start.
7) Start the MAX1258 program by opening its icon in
the Start | Programs menu.
8) Turn on the power supply and slide SW1 to the ON
position on the 68HC16MODULE-DIP module.
Press the OK button to automatically connect and
download the file KIT1258.C16 to the module.
9) Apply an input signal to AIN0 and click Perform
Action. Observe the readout on the screen. To per-
form the action repeatedly, check the every 200ms
checkbox.
10) To view a graph of the measurements, pull down
the View menu and click Graph.
11) Bring up the DAC Outputs tab, select action 1111
cccc cccc 001x Power On Selected Channels,
and click Perform Action.
12) Select action 1100 Write and Load OUT1-OUT8,
set OUT1 code to 2048, and click Perform Action.
Observe that the voltage on OUT1 is now midscale
(2.048V, assuming VREF = 4.096V).
13) Bring up the GPIO Pins tab. Set GPIOA0 to High
Output, set GPIOB0 to Low Output, set GPIOC3 to
Input, and click Write Output Pins. Observe that
the A0 pin is now logic-high and the B0 pin is now
logic-low.
14) Connect GPIO pin C3 to logic-high (A0) and click
Read Input Pins. Observe that the software indi-
cates that C3 is high.
15) Connect GPIO pin C3 to logic-low (B0) and click
Read Input Pins. Observe that the software indi-
cates that C3 is low.
Recommended Equipment (RS-232-to-COM
Port/PC Connection Option)
Before beginning, the following equipment is needed:
• MAX1258 EV system:
MAX1258 EV kit
68HC16MODULE-DIP
• DC power supply, +7V to +20VDC at 0.25A
• A user-supplied Windows 98/2000/XP computer with
an available serial (COM) port
• 9-pin I/O extension cable
Note: In the following sections, software-related items
are identified by bolding. Text in bold refers to items
directly from the EV kit software. Text in bold and
underlined refers to items directly from the Windows
98/2000/XP operating system.
Procedure
The MAX1284 EV kit is fully assembled and tested.
Follow the steps below to verify board operation.
Caution: Do not turn on the power until all connec-
tions are completed.
1) Visit the Maxim website (www.maxim-ic.com/evkit-
software) to download the latest version of the EV
kit software. Save the EV kit software to a temporary
folder and uncompress the file (if it is a .zip file).
2) Install the MAX1258 EV kit software on your com-
puter by running the INSTALL.EXE program. The
program files are copied and icons are created for
them in the Windows Start | Programs menu.
3) Ensure that jumper JU1 is in the 5V position, jumper
JU2 is in the 1-2 position, and jumper JU5 is
closed. Jumper JU4 should be open. Jumper JU3
is closed unless previously cut apart. See Tables
2–6.
4) Carefully connect the boards by aligning the 40-pin
header of the MAX1258 EV kit with the 40-pin con-
nector of the 68HC16MODULE-DIP module. Gently
press them together. The two boards should be
flush against one another.
5) Connect a +7V to +20VDC power source to the µC
module at the terminal block (J2) located next to the
ON/OFF switch (SW1), along the top-edge of the µC
module. Observe the polarity marked on the board.
6) Connect a cable from the computer’s serial port to
the µC module. If using a 9-pin serial port, use a
straight-through, 9-pin, female-to-male cable. If the
only available serial port uses a 25-pin connector, a
Evaluate: MAX1057/MAX1058/MAX1257/MAX1258
MAX1258 Evaluation Kit/Evaluation System
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