Datasheet
MAX9880A Evaluation Kit
Evaluates: MAX9880A
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Detailed Description of Hardware
The MAX9880A EV kit evaluates the MAX9880A low-
power, high-performance, stereo audio codec with
audio processing (U1). The EV kit includes input and
output RCA connections, capless and single-ended
headphone connectors (J3, J4), and two on-board digital
microphones (U15, U16). The EV kit also includes USB-
powered low-dropout (LDO) linear regulators that allow
the EV kit to be evaluated without any external supplies.
These LDOs provide the 1.8V and 3.3V voltages required
by the U1 device and support circuitry.
Integrated into the EV kit design is a digital audio trans-
ceiver (U11) and a USB stereo audio DAC (U12). The
digital audio transceiver provides audio input and output
through the on-board TOSLINK connectors (J5, J6), and
the USB stereo audio DAC provides audio input through
the mini-USB connector (J10).
The EV kit also includes a MAXQ2000 microcontroller (U5)
that interfaces with the U1 device’s I
2
C and SPI control
bus and allows the EV kit to be evaluated with the EV kit
software. See the Detailed Description of Software section.
Figure 20. Advanced User Interface (3-Wire Interface Tab)
Table 13. SPI Interface
MAXQ2000 SPI INTERFACE MAXQ2000 GPIO NET NAME FUNCTION
SEG1/P0.1 K2
CS2
Chip select for the U1 SPI interface
P5.4/SS
K9
CS1
Chip select for the U11 SPI interface
P5.6/SCLK K10 CCLK SPI SCLK clock
P5.7/MISO K11 MAXQ_MISO Master in/slave out
P5.5/MOSI K12 CDIN Master out/slave in