MAX6955EVKIT Maxim Integrated, MAX6955EVKIT Datasheet - Page 4

• Manufacturer Part Number: MAX6955EVKIT
• Description: LED Lighting Development Tools Evaluation Kit for the MAX6955
• Manufacturer: Maxim Integrated
• Series: MAX6955r

Specifications of MAX6955EVKIT

• Product: Evaluation Kits

The Alphanumeric Entry for U2 group box is in the
upper right-hand corner of the software’s main window.
This group box has five main controls:
• Plane group box
• U2 Address (write) combo box
• U2 Address (read) combo box
• Alphanumeric Entry Field
• Decimal Point checkbox and individual decimal
The first control is the Plane group box, which allows
the user to select which plane to write to. The radio but-
ton choices in the Plane group box are P0 and P1, P0,
and P1. It is important to note that once one of these
plane radio buttons is selected, the software automati-
cally takes the text or numbers that exist in the
Alphanumeric Entry field and writes them to the display.
The second and third controls are the U2 Address
(write) and the U2 Address (read) combo boxes.
These device address combo boxes default to 0xC0 for
write and 0xC1 for read. If you modify the default
device address, change the jumper settings on JU3
and JU4 on the MAX6955 EV kit board. If the default
address settings are changed on the board, the user
must also manually select the correct device address in
the U2 Address (write) and the U2 Address (read)
combo boxes. Table 2 lists the device address selec-
tion for the various JU3 and JU4 jumper settings.
The fourth control is the Alphanumeric Entry field, which
displays EVKIT at the start of the program. The user
may type letters, numbers, apostrophes, commas, or
even spaces in the Alphanumeric Entry field using the
computer’s keyboard. The Alphanumeric Entry field
also supports standard word processing features like
highlighting, insert, and delete. Anytime an invalid char-
acter is typed into the Alphanumeric Entry field, such
as an @, a character error message box pops up, indi-
cating an invalid character was typed. Anytime a valid
character is typed into the Alphanumeric Entry field, the
software automatically writes it to the corresponding
digit on the display.
The last control type within the Alphanumeric Entry
for U2 group box is the Decimal Point checkbox and
the individual decimal point checkboxes. When the
Decimal Point checkbox is checked, all of the individ-
ual decimal point checkboxes become visible. When
the Decimal Point checkbox is unchecked, all of the
individual decimal point checkboxes are hidden.
MAX6955 Evaluation Kit
4
point checkboxes
_______________________________________________________________________________________
Alphanumeric Entry for U2
Checking one of the individual decimal point checkbox-
es automatically lights up the corresponding decimal
point on the board.
The MAX6955 EV kit software has 43 register tabs for
both U1 and U2, giving access to 86 unique registers.
Any register tab can be selected by a mouse click
when visible and not all register tabs can be visible at
once. Scroll through the register tabs using the left and
right scroll arrows located on the right-hand side of the
software’s main window. The order of the register tabs
corresponds to the same order of the MAX6955’s
address map. Refer to the MAX6955 IC data sheet for
details on the address map and a complete description
of each register.
When you type on the keyboard, the system must know
which control should receive the keys. Press the tab
key to move the keyboard’s focus from one control to
the next. The focused control is indicated by a dotted
outline. Shift + tab moves the focus to the previously
focused control. Buttons respond to the keyboard’s
space bar. Some controls respond to the keyboard’s
up and down arrow keys. Activate the program’s menu
bar by pressing the F10 key, then press the letter of the
menu item you want. Most menu items have one letter
underlined, indicating their shortcut key.
The MAX6955 EV kit board is designed symmetrically
so that the left side of the board pertains to U1 and the
right side of the board pertains to U2. Thus, the first
eight digits are driven by U1 and the last eight digits
are driven by U2. An OSC pad for U1 is provided for
external clock operation and an OSC_OUT pad for U2
is also provided for cascading additional MAX6955
devices. The DB-25 connector and associated circuitry
are only needed for obtaining the 2-wire interface from
the PC’s parallel port and are not needed in typical
applications. Connect the DB-25 connector, J1, to the
PC’s parallel port using a 25-pin straight-through,
female-to-male cable. Four jumpers are on the EV kit
board to modify the device address for U1 and U2. The
two dual-row 20-pin headers, J2 and J3, are used for
the I/O expander and keyscan features of U1 and U2,
respectively.
The MAX6955 EV kit board contains four jumpers in the
top right-hand corner of the board. Jumpers JU1 and
Device Address Jumpers JU1–JU4
Hardware Description
Keyboard Navigation
Register Tabs