MAX6969EVKIT+ Maxim Integrated Products, MAX6969EVKIT+ Datasheet - Page 6

• Manufacturer Part Number: MAX6969EVKIT+
• Description: LED Lighting Development Kits KIT EVAL FOR MAX6969 MAX6969 KIT
• Manufacturer: Maxim Integrated Products

Specifications of MAX6969EVKIT+

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

MAX6969 Evaluation Kit
The MAX6969 EV kit software provides several demon-
stration modes. Selecting Click to toggle segments
allows arbitrary patterns to be entered by clicking on
the segments in the GUI display, then clicking the
Apply button. Selecting the Counter demonstration,
PC Time demonstration, or PC Date demonstration
mode displays numeric data. The Loopback test all
segments mode is used during EV kit testing to verify
that all three MAX6969 devices are daisy chained, and
that each segment is individually controllable. The last
two modes turn all segments off or all segments on.
Each time the 7-segment display is updated, the SPI
sequence is displayed in hexadecimal, in time
sequence. The first 2 bytes control the last device in
the daisy chain (U3). The last 2 bytes control the first
device in the daisy chain (U1).
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Detailed Description of
History Window
Software
Each MAX6969 (U1, U2, and U3) drives a dual 7-seg-
ment display (LED1, LED2, and LED3). LED4 indicates
USB 5V power is present.
The FTDI FT232 (U5) provides the USB engine. The
USB 5V power is regulated down to 3.3V and 2.5V by
U7 and U8.
The low-voltage RISC microcontroller, MAXQ2000 (U4),
processes commands sent by a program running on
the PC. Each particular EV kit has its own custom soft-
ware specific to that kit. The firmware loaded on this
board is identical to the MINIQUSB interface module.
To disconnect from the on-board SPI bus, cut the links
at jumper block J2 and jumper block JU1. Connect
JU1, pins 2-3, and provide 5V power to the GND and
EXT_VLED oval pads. Connect the external SPI bus to
the labeled test points of jumper block J2.
Using an External SPI Bus Instead of USB
Detailed Description of
Hardware