UMTS/HSPA/LTE Module Series
UMTS<E EVB User Guide
UMTS<E_EVB_User_Guide 22 / 44
4.5. Audio Interfaces
Quectel UMTS<E EVB provides one digital audio codec board interface (PCM) J501 and three analog
audio interfaces J601, J602 and J603. This chapter gives a detailed introduction on these audio
interfaces.
4.5.1. Digital Audio Codec Board Interface (J501)
The UMTS<E EVB supports two different kinds of external digital audio codecs named ALC5616 and
TLV320AIC3104. The codec circuit is assembled on an independent small board which can be
interconnected with EVB by the BTB connector J501.
Customers can select different codecs according to their own application demands, and also can use AT
command to switch between codecs. Two examples are provided below. For more details, please refer to
document [5]
or
document [6]
.
AT+QDAI=3
: switch codec from TLV320AIC3104 to ALC5616
AT+QDAI=5
: switch codec from ALC5616 to TLV320AIC3104
The following figure show a reference design for the connection between digital audio codec boards and
the EVB.
PCM_IN
PCM_OUT
PCM_SYNC
PCM_CLK
I2C_SCL
I2C_SDA
U101
ALC5616/TLV3104
UMTS<E Module
VDD_EXT
4.
7K
4.
7K
BCLK
LRCK
DACDAT1
ADCDAT1
SCL
SDA
M
IC
_B
IA
S
MIC_BIAS
IN2P
IN2N
LOUDL/P
LOUDR/N
R
C
HPO_R
HPO_L
J601
J602
speaker
J603
NCP2823
2
4
5
3
1
6
J602 MIC
BTB CON
BTB CON
J501
J501
Figure 12: Reference Design for Connection between Codec Board and EVB
