EVK-MAYA-W2 - User guide
UBX-22011269 - R04
Board description
Page 17 of 20
C1 – Public
3.6
Bluetooth audio interface
For Bluetooth voice applications, MAYA-W2 EVB includes a MAX9860 16-bit audio codec that
connects to the PCM/I2S interface of the module. It also includes a 3.5 mm audio jack (J16) for
connecting a headset. The MAX9860 codec is driven by 19.2 MHz master clock (MCLK) and is
completely controlled through software using an I2C interface. The codec responds to the I2C slave
address 0x20 for all write commands and 0x21 for all read operations.
The I2C interface of the audio codec is provided on
, as shown in
. The PCM/I2S
interface of the MAYA-W2 module is directly connected to the serial audio interface of the MAX9860
audio codec. The PCM pins are shared with the I2S interface and extend to
, as shown in
. To connect the PCM/I2S interface of MAYA-W2 to the M.2 card connector J2, place jumper
bridges on J4 positions 1-2, 3-4, 5-6, and 7-8.
Name
I/O
Connector / pin no.
Description
I2C_SDA
I/O
J5 / 16
I2C Serial-Data Input/Output
I2C_SCL
I
J5 / 18
I2C Serial-Data clock
PCM_CLK
I/O
J4 / 2
PCM clock
Alternate function: I2S clock
PCM_SYNC
I/O
J4 / 4
PCM frame sync
Alternate function: I2S word select
PCM_DOUT
O
J4 / 6
PCM data out
Alternate function: I2S data out
PCM_DIN
I
J4 / 8
PCM data in
Alternate function: I2S data in
Table 9: Audio interfaces
3.7
GPIOs
that provide direct access to the UART, JTAG, GPIO and
PCM/I2S interfaces on the MAYA-W2 module. The interface signals are connected through jumpers
to the M.2 card interface connector J2 or accessed directly through the pin headers.
3.8
Antenna interfaces
The evaluation board of EVK-MAYA-W271 includes two standard 50
Ω
female SMA connectors for
connecting external antennas or measurement instruments. EVK-MAYA-W276 uses the internal PCB
antenna of MAYA-W276.
describes the available radio interfaces of the MAYA-W2 module and the respective antenna
interfaces on the EVB.
Product name
Module antenna interface Function
Antenna interface on EVB
EVK-MAYA-W271
RF_ANT0
2.4/5 GHz Wi-Fi
SMA connector J10
RF_ANT1
Bluetooth, shared with IEEE
802.15.4 on EVK-MAYA-W271
SMA connector J11
EVK-MAYA-W276
Internal PCB antenna
2.4/5 GHz Wi-Fi,Bluetooth and
802.15.4
-
Table 10: Antenna interface configuration
☞
Connect the external antennas supplied with EVK-MAYA-W271 to the SMA connectors J10
and J11. If 2.4 GHz Wi-Fi and Bluetooth/802.15.4 are used at the same time, bend the
antennas at a 90° angle to each other or use a coaxial RF cable to increase isolation between
the antennas.
