CMOD232+ Maxim Integrated Products, CMOD232+ Datasheet - Page 5

• Manufacturer Part Number: CMOD232+
• Description: EVAL SYSTEM FOR MAX9850
• Manufacturer: Maxim Integrated Products

Specifications of CMOD232+

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

The status bar displays vital MAX9850 clock information.
Return the EV kit to its power-on-reset state by clicking
the POR Reset button. Power up the MAX9850 by
clearing the MAX9850 Global Shutdown checkbox.
Power up the receiver (U2) by selecting the Receiver
Enabled checkbox.
The MAX9850 EV kit software features additional func-
tions to simplify operation. Automatic Diagnostics
probes the command module board and the MAX9850
EV kit to make sure that all connections are made, and
all devices are working. This will create some activity
on the I
box will reduce I
of an oscilloscope.
The Auto Setup button further reduces user input. When
this button is pressed, the software will do the following:
1) Search both EV kit S/PDIF inputs for a valid signal
2) Power up the receiver IC as well as vital sections of
3) Set internal clock dividers based on the incoming
Figure 2. MAX9850 EV Kit Software Status Window
Figure 3. MAX9850 EV Kit Software Status Bar
and then set the on-board multiplexer accordingly.
the MAX9850.
master clock frequency.
2
C bus. The Silence I2C-bus Activity check-
MAX9850 Evaluation System/Evaluation Kit
2
C bus activity to allow easy triggering
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4) Set the MSB(14:8) and LSB(7:0) bits based on the
5) Set the charge-pump clock division bits if the
The Auto Setup button is intended to simplify user
interaction by placing the EV kit into a known-good
mode of operation.
The MAX9850 EV kit software defaults to a state that
continually polls the device for new status data and
monitors the alert conditions. The contents of the status
register are displayed in the MAX9850 Status group
box (Figure 2). Changes in the GPIO state, PLL lock,
headphones present, volume, and output overload can
be set to trigger an interrupt by checking the check-
box next to the desired information.
To disable continuous polling of data, uncheck the
Automatic Status Read checkbox (Figure 1). Force a
manual status register read by clicking the Read
Status button.
If an interrupt condition is generated, the message
INTERRUPT appears next to the interrupt status label.
If enabled, the program will disable automatic reading
of the status register.
The status bar (Figure 3) displays the MAX9850 master
clock, internal clock, and charge-pump clock frequen-
cies. By default it is updated automatically; however, this
feature can be turned off (see the Clock Setup section).
The Headphones tab (Figure 1) allows access to the
MAX9850 headphone-related controls.
Headphone volume can be adjusted in dB increments by
adjusting the Volume Control slider. The dB increments
are not evenly spaced and are detailed further in the
MAX9850 data sheet. Alternatively, a number can be
entered in the box below the Volume Control slider. If a
number that does not match a predefined dB increment
is entered, the software automatically rounds the number
to the nearest valid dB increment and sends the appro-
priate I
selecting the Mute checkbox.
Additional headphone control is also provided through
the Headphone Features box. Slew Rate Control is
controlled through the respective check and drop-
desired mode of operation.
MAX9850 is not using the internal oscillator.
2
C data to the MAX9850. Mute the HP output by
MAX9850 Status/Interrupt
Headphone Control
Status Bar
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