MAX9880AEVKIT# Maxim Integrated Products, MAX9880AEVKIT# Datasheet - Page 27

• Manufacturer Part Number: MAX9880AEVKIT#
• Description: Audio Modules & Development Tools MAX9880A Eval Kit
• Manufacturer: Maxim Integrated Products

The two digital audio interfaces (S1, S2) of the U1 device
are routed through headers JU13 and JU19 to the on-
board digital audio transceiver (U11) and USB stereo
audio DAC (U12), respectively (see Tables 24 and 25).
Place shunts across all 2-3 positions to connect the U1
device’s S1 and S2 interfaces to the listed U11 and U12
interfaces.
The digital audio transceiver connects to TOSLINK con-
nectors J5 and J6 for audio input and output. The device
is operated in software mode (HS pin tied low) and is
connected to the U1 device’s S1 digital audio interface.
The audio transceiver is also interfaced to the EV kit’s SPI
control bus and is selected by the CS1 chip select line.
See the S/PDIF Audio section.To manually configure the
Table 22. JU10 and JU11 Function
*Default position.
Table 23. JU14–JU17 and JU22 Functions
*Connects to DVDDS1.
**Default position.
Table 24. S1 Interface Header (JU13)
Not installed*
POSITION
SHUNT POSITION
POSITION 1
Installed
SHUNT
(LEFT)
Not installed
GND
GND
GND
GND
Installed**
Digital Audio Interfaces (S1, S2)
Differential, capacitorless, or single-ended
______________________________________________________________________________________
POSITION 2
Digital Audio Transceiver (U11)
(CENTER)
ADCOUT1
DACIN1
LRCLK1
Single-ended (clickless)
BCLK1
JU13
HEADPHONE MODE
(JU14)
DVDD
(fast turn-on)
1.8V
Connect an external supply across their respective pads and ground.
POSITION 3
U11_LRCLK
U11_BCLK
U11_DAC
U11_ADC
(RIGHT)
MICVDD
(JU22)
1.8V
MAX9880A Evaluation Kit
device’s registers, select the Show S/PDIF Transceiver
Registers item from the View drop-down menu. This
enables the CS8427 tab, which functions in the same
manner as the Control Registers tab. When the U11
device is enabled, the Read All button also reads all the
U11 registers and updates the CS8427 tab.
The USB stereo audio DAC connects to the mini-USB
connector J10 for audio input. The audio DAC uses a
standard Windows class driver, and when connected to
a PC it is recognized as an external sound card, allow-
ing audio from a PC to be played through the EV kit. This
audio path is configured and enabled by selecting the
USB block on the Digital Audio tab. See the USB Audio
section.
Table 25. S2 Interface Header (JU19)
*Signals are routed from the U4 level translator.
POSITION 1
(JU16)
PVDD
1.8V
(LEFT)
GND
GND
GND
GND
(JU15)
AVDD
POSITION 2
1.8V
(CENTER)
ADCOUT2
LRCLK2
DACIN2
BCLK2
USB Stereo Audio DAC (U12)
JU19
DVDDIO*
POSITION 3*
U12_LRCLK
(JU17)
U12_BCLK
U12_DAC
U12_ADC
3.3V
(RIGHT)
27