MAX7314EVKIT+ Maxim Integrated, MAX7314EVKIT+ Datasheet - Page 3

• Manufacturer Part Number: MAX7314EVKIT+
• Description: Peripheral Drivers & Components - PCIs Evaluation Kit for the MAX7314
• Manufacturer: Maxim Integrated

Specifications of MAX7314EVKIT+

• Operating Supply Voltage: 2 V to 3.6 V

Before beginning, the following equipment is needed:
•
•
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 under-
lined refers to items from the Windows operating system.
The MAX7314 EV kit is fully assembled and tested.
Follow the steps below to verify board operation:
1) Visit www.maxim-ic.com/evkitsoftware to download
2) Install the EV kit software on your computer by run-
3) Verify that a shunt is installed on pins 1-3 of jumper
4) Verify that a shunt is installed on jumpers JU4 and
5) Connect the USB cable from the PC to the EV kit
6) Follow the directions of the Add New Hardware
7) Start the EV kit software by opening its icon in the
See the Detailed Description of Software section for more
information on the MAX7314 EV kit software operation.
MAX7314EVKIT+ (USB cable included)
Windows 2000/XP/Vista PC with a spare USB port
the latest version of the MAX7314 EV kit software.
Save the EV kit software to a temporary folder and
uncompress the ZIP file, 7314Rxx.ZIP.
ning the INSTALL.EXE program inside the temporary
folder. The program files are copied and icons are
created in the Windows Start | Programs menu.
JU2 (0x40 address).
JU5 (3Hz blink rate).
board. A Building Driver Database window pops
up in addition to a New Hardware Found message
when installing the USB driver for the first time. If
you do not see a window that is similar to the one
described above after 30s, remove the USB cable
from the board and reconnect it. Administrator privi-
leges are required to install the USB device driver
on Windows 2000/XP/Vista.
Wizard to install the USB device driver. Choose the
Search for the best driver for your device option.
Specify the location of the device driver to be
C:\Program Files\MAX7314 (default installation
directory) using the Browse button. During device
driver installation, Windows might show a warning
message indicating that the device driver Maxim uses
does not contain a digital signature. This is not an
error condition and it is safe to proceed with installa-
tion. Refer to the document USB_Driver_Help.PDF for
additional information.
Start | Programs menu. The EV kit software main
window should appear as shown in Figure 1.
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Required Equipment
Quick Start
Procedure
MAX7314 Evaluation Kit
The MAX7314 EV kit demonstrates the MAX7314 18-
port GPIO with LED intensity control. The EV kit utilizes
the device’s 16 GPIO ports to drive four RGB LEDs and
four WLEDs. The device’s output-only pin (INT/16) is
used as an interrupt output and the input-only pin
(BLINK) is used for blink control. In addition, the EV kit
provides a relay interface (JU7), a configurable BLINK
oscillator, and the ability to evaluate four of the 16 GPIO
ports as inputs (P12–P15). The LEDs can be controlled
independently and their intensity varied using the
appropriate MAX7314 8-bit PWM control register. The
device’s two-phase LED blink control feature and
unique single-pin, one-of-four 2-wire address feature
can also be evaluated. The device requires 3.3V for
operation and is powered by the EV kit circuit’s V+ rail.
The blink feature is demonstrated using a configurable
oscillator circuit. The oscillator circuit comprises two
logic inverters (U2, U3), one capacitor (C23), and three
resistors (R31, R32, and R33). By configuring jumpers
JU4 and JU5, blink frequencies of 0.7Hz to 3.0Hz can
be evaluated. A BLINK_IN PCB pad is provided for
connecting to an external square-wave generator.
Jumper JU6 is used to disable and power down both
inverters, disabling the on-board oscillator.
The MAX7314 EV kit provides SCL and SDA PCB pads
for the 2-wire serial interface signals. These pads can
be connected directly to a user-provided 2-wire system
that has pullup resistors for the SCL and SDA signals.
Jumper JU2 is used to configure the MAX7314 IC’s 2-
wire address and demonstrates the IC’s unique single-
pin, one-of-four 2-wire address feature. A PCB pad is
also provided for the MAX7314 AD0 pin. See Table 2
for additional information.
Several jumper selections and a reset switch function
provided by the MAX7314 EV kit are presented in
Tables 1–8.
The MAX7314 EV kit provides jumper JU1 to select the
source for the V+ rail of the EV kit circuit. By default, the
V+ rail is set to 3.3V, which is supplied by the interface
circuit. Alternatively, the EV kit’s VDD pad can be used
to supply 3.3V to the circuit’s V+ rail. The interface circuit
is powered through a PC’s USB port. Table 1 lists the
various jumper options for powering the circuit’s V+ rail.
Detailed Description of Hardware
Jumper and Switch Functions
EV Kit Circuit V+ Source
3