simcom wcdma wireless module · sim5360 audio application note 1 introduction sim5360 provides some...
TRANSCRIPT
SIMCOM WCDMA Wireless Module SIM5360 Audio Application Note
Document Title: SIM5360 Audio Application Note
Version: 1.01
Date: 2014-06-20
Status: Release
Document Control ID: AN SIM5360 Audio Application Note_V1.01
General Notes SIMCom offers this information as a service to its customers, to support application and engineering efforts that use the products designed by SIMCom. The information provided is based upon requirements specifically provided to SIMCom by the customers. SIMCom has not undertaken any independent search for additional relevant information, including any information that may be in the customer’s possession. Furthermore, system validation of this product designed by SIMCom within a larger electronic system remains the responsibility of the customer or the customer’s system integrator. All specifications supplied herein are subject to change. Copyright This document contains proprietary technical information which is the property of SIMCom Limited., copying of this document and giving it to others and the using or communication of the contents thereof, are forbidden without express authority. Offenders are liable to the payment of damages. All rights reserved in the event of grant of a patent or the registration of a utility model or design. All specification supplied herein are subject to change without notice at any time. Copyright © Shanghai SIMCom Wireless Solutions Ltd. 2014
SIM5360 Audio Application Note
AN SIM5360 Audio Application Note 2014.06.20
3
Contents
Contents ...............................................................................................................................................3 Version history.....................................................................................................................................5 1 Introduction.......................................................................................................................................6 2 Scope of the document......................................................................................................................6 3. Audio Application ............................................................................................................................6
3.1 PCM interface .........................................................................................................................6 3.2 Block diagram of codec...........................................................................................................7 3.3 External Audio Codec Application..........................................................................................8 3.4 Audio channel overview..........................................................................................................8
4 Hardware Design...............................................................................................................................9 4.1 Speaker interface configuration ..............................................................................................9 4.2 Receiver interface configuration .............................................................................................9 4.3 Microphone interfaces configuration ....................................................................................10 4.4 External MIC bias circuit configuration ................................................................................10 4.5 Referenced electronic characteristic......................................................................................11
5 Audio Tuning ..................................................................................................................................11 5.1 MIC volume and frequency response....................................................................................13
5.1.1 AT+CTXFTR Set TX filter.......................................................................................13 5.1.2 AT+CTXVOL Set TX volume..................................................................................13
5.2 Receiver or Speaker volume and frequency response...........................................................14 5.2.1 AT+CRXFTR Set RX filter ......................................................................................15 5.2.2 AT+CVLVL Set value of sound level .......................................................................15 5.2.3 AT+CLVL Loudspeaker volume level ......................................................................16 5.2.4 AT+CRXVOL Set RX volume .................................................................................17
5.3 AT+SIDET Digital attenuation of sidetone ........................................................................18 5.4 Echo canceller .......................................................................................................................19 5.5 TDD noise .............................................................................................................................19 5.6 Sending and receiving distortion...........................................................................................19 5.7 DTMF distortion ...................................................................................................................20
6 Layout guide ...................................................................................................................................20 7 Appendix .........................................................................................................................................21
I. SIM5360 external audio code schematic ...........................................................................21
SIM5360 Audio Application Note
AN SIM5360 Audio Application Note 2014.06.20
4
Figure Index
FIGURE 1: BLOCK DIAGRAM................................................................................................................7 FIGURE 2: REFERENCE CIRCUIT OF PCM APPLICATION WITH AUDIO CODEC.........................8 FIGURE 3: SPEAKER INTERFACE CONFIGURATION ........................................................................9 FIGURE 4: RECEIVER INTERFACE CONFIGURATION ......................................................................9 FIGURE 5: MICROPHONE INTERFACE CONFIGURATION .............................................................10 FIGURE 6: EXTERNAL MIC BIAS CIRCUIT CONFIGURATION ......................................................10 FIGURE 7: AUDIO PROGRAMMING MODEL.....................................................................................12
SIM5360 Audio Application Note
AN SIM5360 Audio Application Note 2014.06.20
5
Version history
Date Version Description of change Author
2014-06-20 1.01 Origin Libing
SIM5360 Audio Application Note
1 Introduction
SIM5360 provides some AT commands for audio tuning. This document describes how to design and tune the audio part for best performance of SIMCOM WCDMA wireless module. (SIM5360 represents the series which is stated below.)
2 Scope of the document
This document is intended for the following versions of the SIMCom modules •SIM5360
3. Audio Application
3.1 PCM interface
Table 1: PCM mode
PCM mode SYNC CLK MODE Format Slot
Auxiliary 8KHz 128KHz Master Only slot 0
Primary 8KHz 2.048MHz Slave/Master
A-law(8 bits)
The default PCM interface on power up is the auxiliary PCM interface. Under PCM, the data is output on the rising edge of PCM_CLK and sampled at the falling edge of PCM_CLK. Primary PCM is disabled at power up or when RESET is asserted, but you can use AT command to enable the primary PCM mode. PCM Interface can be operated in Master and Slave mode. When the PCM interface is configured, PCM Tx data will be routed from the external codec Mic through the DSP encode path in the Module. PCM Rx data will be routed through the DSP decode path to the external codec speaker. When using the PCM Interface, the Module can be set either into Master Mode or Slave Mode. In Master Mode, the Module drives the clock and sync signals that are sent out to the external codec via the PCM Interface. When in Slave Mode, the external codec drives the clock and sync signals that are sent to the Module.
AN SIM5360 Audio Application Note 2014.06.20
6
υ-law(8 bits) linear(16 bits)
0~15(Changed by AT command:at+cpcmslot) Default:slot 0
SIM5360 Audio Application Note
Configuration Mode can be selected either primary or auxiliary. Primary configuration mode uses 2.048MHz clock and 8kHz short sync clock, and auxiliary configuration mode uses 128kHz clock and 8kHz long sync clock. One important consideration is that Slave mode is only available for use with Primary configuration Mode. PCM formats can also be chosen by AT command.
Note: 1. PCM interface can be control by AT command. For more details please refer to SIM5360_ATC_EN_V1.xx.doc 2. Timing of SIM5360 pcm please refer to SIM5360_Hardware_Design_V1.xx.doc
3.2 Block diagram of codec
The block diagram of the SIM5360 and external audio codec is described in the figure below. .
Figure 1: block diagram
AN SIM5360 Audio Application Note 2014.06.20
7
SIM5360 Audio Application Note
3.3 External Audio Codec Application
The following figure is the reference design of SIM5360 PCM interface and external codec IC.
Figure 2: Reference Circuit of PCM Application with Audio Codec
3.4 Audio channel overview
The table below shows the audio channels of SIM5360 wireless module.
Table 2: Audio channels
Module Audio Channel Note
Input: LINPUT2, LINPUT1
AN SIM5360 Audio Application Note 2014.06.20
8
Handset: AT+CSDVC =1 Output: HP_L
Input: LINPUT2, LINPUT1 Headset: AT+CSDVC=2 Output: HP_L
Input: LINPUT2, LINPUT1
SIM5360
Handfree: AT+CSDVC=3
Output: SPK_LP,SPK_LN
SIM5360 Audio Application Note
4 Hardware Design
4.1 Speaker interface configuration
Figure 3: Speaker interface configuration
Because SPK_LP and SPK_LN are outputs of Class-D audio amplifier, optional EMI filtering is shown at Figure 1; these components (two ferrite beads and two capacitors) can be added to reduce electromagnetic interference. If used, they should be located near the SPK_LP and SPK_LN. Considerable current flows between the audio output pins and the speaker, so wide PCB traces are recommended (~ 20 mils). 8Ohm speaker is suggested. And the SPK_LP and SPK_LN should layout differential, and they should be far away from VBAT, RF signals, clock and other high power or high frequency signals.
4.2 Receiver interface configuration
AN SIM5360 Audio Application Note 2014.06.20
9
Figure 4: Receiver interface configuration
SIM5360 Audio Application Note
33p and 10p are suggested to be added beside the 32 Ohm receiver to reduce RF interfere. The width of HP_L line is typical 6 mils to reduce impedance. They should be far away from VBAT, RF signals, clock and other high power or high frequency signals. HP_L and it’s return path lines should be layout pseudo-differential.
4.3 Microphone interfaces configuration
Figure 5: Microphone interface configuration
WM8960 CODEC has integrated internal MIC bais circuit. There is no need to pull the MIC_P and MIC_M up to the external power, because they have been pulled up in the Module. MIC_P and MIC_N should be layout pseudo-differential.
4.4 External MIC bias circuit configuration
AN SIM5360 Audio Application Note 2014.06.20
10
Figure 6: External MIC bias circuit configuration
SIM5360 Audio Application Note
AN SIM5360 Audio Application Note 2014.06.20
11
External MIC bias circuit is described in the figure above. MIC_P and MIC_N should be layout pseudo-differential.
4.5 Referenced electronic characteristic
Table 3: MIC Input Characteristics
Parameter Min Typ Max Unit Working Voltage 1.80 V Working Current 70 400 uA External Microphone Load Resistance
1.2 2.2 k Ohms
Table 4: Audio Output Characteristics
Parameter Min Typ Max Unit load Resistance 27 32 Ohm Normal Output
(HP_L) Differential Output power 70 mW
Single Ended
load Resistance 12 16 Ohm
Differential load Resistance 27 32 Ohm
Auxiliary Output (HPR,HPL)
Single Ended
Output power 21.6 mW
Table 5: Speaker Output Characteristics
Parameter Min Typ Max Unit Quiescent Current 6.2 mA
Output power(1KHz) 500 mW
5 Audio Tuning
The audio programming model shows how the signal path can be influenced by varying AT command parameters. Parameters <txVol>, <txFilter>, <stGain> ,<rxVol> and <rxFilter> can be adjusted with corresponding AT commands. For more information on the AT commands and parameters please refer to SIMCOM_SIM5360_ATC_EN_V1.xx.doc
SIM5360 Audio Application Note
AN SIM5360 Audio Application Note 2014.06.20
12
Figure 7: Audio programming model
Main audio parameters can be changed to satisfy users’ requirement. Here primary register parameters and related description are listed. User can adjust them through AT command. For more detail please refers to Audio Application Document.
Table 6: Audio parameter
Parameter Influence to Range Gain range Calculation AT command
txVol Digital gain of input signal after ADC
0, 1...65535
Mute, -84...+12dB
20 * log (txVol/ 16384)
AT+CTXVOL
txFilter Input PCM 13-tap filter parameters, 7 values
0...65535 --- MATLAB calculate
AT+CTXFTR
rxVol
Digital Volume of output signal after speech decoder, before summation of sidetone and DAC
-300…300 dbm -300…300dbm
AT+CLVL AT+CVLVL AT+CRXVOL
stGain Digital attenuation of sidetone
0, 1...65535Mute, -96...0dB
20 * log (stGain/ 16384) -12
AT+SIDET
rxFilter Output PCM 13-tap filter parameters, 7 values
0...65535 --- MATLAB calculate
AT+CRXFTR
SIM5360 Audio Application Note
AN SIM5360 Audio Application Note 2014.06.20
13
5.1 MIC volume and frequency response
In figure7, one can turn adjust codec part or DSP part parameters to get desired MIC volume or frequency response. DSP part <txFilt>: AT+ctxftr (Detail description refer to table 7) <txVol>: AT+ctxvol (Detail description refer to table 8) Note: From figure7, user can see that AT+ctxftr, AT+ctxvol can influence sidetone.
5.1.1 AT+CTXFTR Set TX filter
Description This command is used to set audio path parameter – TX filter, and refer to related hardware design document to get more information.
SIM PIN References
NO Vendor
Syntax
Test Command Responses
AT+CTXFTR=? +CTXFTR: (list of supported <tx_ftr_N>s)
OK
Read Command Responses
AT+CTXFTR? +CTXFTR: <tx_ftr_1>,<…>,<tx_ftr_7>
OK
Write Command Responses
AT+CTXFTR=
<tx_ftr_1>,<…>,<tx_ftr_7>
OK
Defined values
<tx_ftr_N>
TX filter level which is from 0 to 65535. (N is from 1 to 7)
Examples
AT+CTXFTR=1111,2222,3333,4444,5555,6666,7777
OK
5.1.2 AT+CTXVOL Set TX volume
Description
SIM5360 Audio Application Note
AN SIM5360 Audio Application Note 2014.06.20
14
This command is used to set audio path parameter – TX volume, and refer to related hardware design document to get more information.
SIM PIN References
NO Vendor
Syntax
Test Command Responses
AT+CTXVOL=? +CTXVOL: (list of supported <tx_vol>s)
OK
Read Command Responses
AT+CTXVOL? +CTXVOL: <tx_vol>
OK
Write Command Responses
AT+CTXVOL=<tx_vol> OK
Defined values
<tx_vol>
TX volume level which is from 0 to 65535.
Examples
AT+CTXVOL=1234
OK
5.2 Receiver or Speaker volume and frequency response
In figure7, one can only turn adjust DSP part parameters to get desired receiver or speaker volume and frequency response. The parameter of codec part of module can not be adjusted. DSP part <rxFilt>: AT+crxftr (Detail description refer to table 9 ) <rxVol>: AT+cvlvl, (Detail description refer to table 10)
AT+clvl, (Detail description refer to table 11) AT+crxvol (Detail description refer to table 12)
AT+crxvol is used for fine tuning for <rxVol>. AT+CLVL and AT+CVLVL are used for coarse tuning for <rxVol>. Although we provide some AT for adjust the volume such as CRXVOL. These commands can change the voice levels together, that is to say, all the levels are promoted by these two parameters. But if you want to change each sound level value, you should use command CVLVL. AT+CVLVL This command changes the sound level values of the command CLVL. Now we provide 8 levels for each audio channel. The level 0 is muted and it can not be changed by CVLVL. Levels 1 to 7 are supported to change the value of sound level. CVLVL command could let you
SIM5360 Audio Application Note
AN SIM5360 Audio Application Note 2014.06.20
15
change these four levels. The bigger the number presents the louder the voice. And the range of each level is -5000 to 5000.
5.2.1 AT+CRXFTR Set RX filter
Description This command is used to set audio path parameter – RX filter, and refer to related hardware design document to get more information.
SIM PIN References
NO Vendor
Syntax
Test Command Responses
AT+CRXFTR=? +CRXFTR: (list of supported <rx_ftr_N>s)
OK
Read Command Responses
AT+CRXFTR? +CRXFTR: <rx_ftr_1>,<…>,<rx_ftr_7>
OK
Write Command Responses
AT+CRXFTR=
<rx_ftr_1>,<…>,<rx_ftr_7>
OK
Defined values
<rx_ftr_N>
RX filter level which is from 0 to 65535. (N is from 1 to 7)
Examples
AT+CRXFTR=1111,2222,3333,4444,5555,6666,7777
OK
5.2.2 AT+CVLVL Set value of sound level
Description This command is used to set audio path parameter – RX volume. This command is different from CRXVOL (command CRXVOL will modify the values of all sound levels offset we provided together). You can change the value of each sound level based on your design separately through this command. Please refer to related hardware design document for more information.
SIM PIN References
SIM5360 Audio Application Note
AN SIM5360 Audio Application Note 2014.06.20
16
NO Vendor
Syntax
Test Command Responses
AT+CVLVL=? +CVLVL: (list of supported <lvl>s),(list of supported <lvl_v-alue>s)
OK
Read Command Responses
AT+CVLVL? +CVLVL: <lvl_value1>,<lvl_value2>,<lvl_value3>,<lvl_value4> ,
<lvl_value5>,<lvl_value6>,<lvl_value7>,<lvl_value8>
OK
Write Command Responses
+CVLVL: lvl_value
OK
AT+CVLVL=<lvl>,<lvl_value>
ERROR
Defined values
<lvl>
Sound level number which is from 1 to 8. <lvl_value>
Sound level value which is from -5000 to 5000. <lvl_value1>
Sound level value that sound level number equals 1. <lvl_value2>
Sound level value that sound level number equals 2. <lvl_value3>
Sound level value that sound level number equals 3. <lvl_value4>
Sound level value that sound level number equals 4. <lvl_value5>
Sound level value that sound level number equals 5. <lvl_value6>
Sound level value that sound level number equals 6. <lvl_value7>
Sound level value that sound level number equals 7. <lvl_value8>
Sound level value that sound level number equals 8.
5.2.3 AT+CLVL Loudspeaker volume level
Description
SIM5360 Audio Application Note
AN SIM5360 Audio Application Note 2014.06.20
17
Write command is used to select the volume of the internal loudspeaker audio output of the device.
Test command returns supported values as compound value.
SIM PIN References
NO 3GPP TS 27.007
Syntax
Test Command Responses
AT+CLVL=? +CLVL: (list of supported <level>s)
OK
Read Command Responses
AT+CLVL? +CLVL: <level>
OK
Write Command Responses
OK AT+CLVL=<level>
ERROR
Defined values
<level>
Integer type value which represents loudspeaker volume level. The range is from 0 to 7, and 0 represents the lowest
loudspeaker volume level, 2 is default factory value.
NOTE: <level> is nonvolatile, and it is stored when restart.
Examples
AT+CLVL?
+CLVL:2
OK
AT+CLVL=3
OK
5.2.4 AT+CRXVOL Set RX volume
Description This command is used to set audio path parameter – RX volume, and refer to related hardware design document to get more information.
SIM PIN References
NO Vendor
Syntax
SIM5360 Audio Application Note
AN SIM5360 Audio Application Note 2014.06.20
18
Test Command Responses
AT+CRXVOL=? +CRXVOL: (list of supported <rx_vol>s)
OK
Read Command Responses
AT+CRXVOL? +CRXVOL: <rx_vol>
OK
Write Command Responses
AT+CRXVOL=<rx_vol> OK
Defined values
<rx_vol>
RX volume level which is from -100 to 100.
Examples
AT+CRXVOL=12
OK
5.3 AT+SIDET Digital attenuation of sidetone
Description The command is used to set digital attenuation of sidetone. For more detailed information, please refer to relevant
HD document.
SIM PIN References
NO Vendor
Syntax
Test Command Responses
AT+SIDET=? +SIDET: (list of supported <st>s)
OK
Read Command Responses
AT+SIDET? +SIDET:<st>
OK
Write Command Responses
OK AT+SIDET= <st>
ERROR
Defined values
<st>
SIM5360 Audio Application Note
AN SIM5360 Audio Application Note 2014.06.20
19
Digital attenuation of sidetone, integer type in decimal format and nonvolatile. Range: from 0 to 65535.
Factory value: HANDSET:2034, HEADSET:1024, SPEAKER PHONE: 0.
Examples
AT+CSDVC=1
OK
AT+SIDET?
+SIDET: 2304
OK
5.4 Echo canceller
SIM5360 has AT command“AT+ CECM” to adjust echo canceller. This AT command is used to select the echo cancellation mode. Each audio channel has it’s own default echo cancellation mode. at+cecm=0 : disable EC mode at+cecm=1 : EC mode recommended for Handset at+cecm=2 : EC mode recommended for Headset at+cecm=3 : EC mode recommended for HANDSFREE at+cecm=4 : EC mode recommended for SPEAKER at+cecm=5 : EC mode recommended for BT HEADSET at+cecm=6,EC mode recommended for Speaker phone aggressive echo arithmetic at+cecm=7,EC mode recommended for Speaker phone medium echo arithmetic at+cecm=8,EC mode recommended for Speaker least aggressive echo arithmetic
5.5 TDD noise
Making sure the module connect to ground well can help to reduce the TDD noise and improve ESD. Filtering capacitors and beads are suggested to be added in the audio lines, 33p and 10p can help reduce the 850Mhz/900Mhz and 1800Mhz/1900Mhz RF interfere. If it is signal, the filtering capacitors and beads are suggested to add beside the module pins. If it is output trace, the filtering capacitors and beads are suggested to add beside the handset/ headset/speaker connector.
5.6 Sending and receiving distortion
There are many factors which may influence the sending and receiving distortion. 1. Unsuitable FIR parameters. They can be adjust by AT+CTXFTR, AT+CRXFTR. 2. Too large TDD noise. 3. Unsuitable AGC parameters.
SIM5360 Audio Application Note
AN SIM5360 Audio Application Note 2014.06.20
20
5.7 DTMF distortion
Too large sending and receiving gain may result in DTMF distortion. If one find DTMF sending distortion which can be measured by the oscillograph in receiving end, one can decrease the codec gain and try again. Other sending parameters can also be adjusted to get better DTMF performance. If one find DTMF receiving distortion, on can adjust receiving parameters to get better DTMF performance.
6 Layout guide
The audio signals are sensitive to RF signals and power sources (for example Vbat). Please make sure that the audio signals are far away from the RF signals and Vbat. And the output signals and input signals should be kept away from each other by ground. The differential lines should be layout together. And HPL and HPR are not differential signals, so they should be layout separately. Filtering capacitors and beads are suggested to be added in the audio lines, 33p and 10p can help reduce the 850Mhz/900Mhz and 1800Mhz/1900Mhz RF interfere. If it is signal, the filtering capacitors and beads are suggested to add beside the module pins. If it is output trace, the filtering capacitors and beads are suggested to add beside the handset/ headset/speaker connector. One can send design to us for checking.
SIM5360 Audio Application Note
AN SIM5360 Audio Application Note 2014.06.20
21
7 Appendix
I. SIM5360 external audio code schematic
B
C
D
6
5
4
3
2
1
D
C
B
A
SH
EE
T
DR
AW
N B
Y
CH
EC
KE
D B
Y
<N
AM
E H
ER
E>
<N
AM
E H
ER
E>
1
2
3
4
5
6
TIT
LE
PO
RJE
CT
SIZ
E
of
SIM
Te
chn
olo
gy
VE
R
A
P5
_A
UD
IO
A2
5
5
20
14
-4-3
0
V1
.01
SIM
53
60
-EV
B
Clo
se t
o m
odule
close
to h
andse
t co
nnec
tor
Han
dse
t
Spea
ker
Anal
og A
udio
PC
M C
OD
EC
Clo
se t
o c
odec
4
1
3
2
J306
HA
ND
SET
CO
N
L503
1.2
K@
100M
L505
1.2
K@
100M
L511
1.2
K@
100M
L512
1.2
K@
100M
C515
33PF
C516
100PF
C521
33PF
C522
100PF
C523
33PF
C524
100PF
C525
100PF
C517
33PF
C518
100PF
C519
33PF
C520
100PF
R500
0R
R501
0R
R502
0R
R503
0R
R522
0R
R521
0R
1
2
J501
T-PIN-1X2
R523
0R
C526
100PF
C527
100PF
C532
100PF
C533
100PF
1
2
TVS504
PESD5V0S1BL
1
2
TVS505
PESD5V0S1BL
1
2
TVS500
PESD5V0S1BL
1
2
TVS501
PESD5V0S1BL
1
2
TVS502
PESD5V0S1BL
1
2
TVS503
PESD5V0S1BL
11
MC
LK
9
DG
ND
25
SPK_LP
31
HP_L
26
SPKV
DD
1
32
AV
DD
28
AG
ND
30
OU
T3
23
SPK_LN
13
DA
CLR
CK
1
MIC
BIA
S
6
RIN
PU
T2
22
SPK_R
P
8
DC
VD
D
10
DBV
DD
19
SPK_R
N
12
BC
LK
14
DA
CD
AT
24
SPKG
ND
1
16
AD
CD
AT
15
AD
CLR
CK/G
PIO
1
4
LIN
PU
T1
5
RIN
PU
T1
3
LIN
PU
T2
29
HP_R
20
SPKG
ND
2
18
SD
IN
17
SC
LK
2
LIN
PU
T3/J
D2
7
RIN
PU
T3/J
D3
27
VM
ID
21
SPKV
DD
2
33
GN
D_PA
DD
LE
U501
22V10/SO_6
WM
8960G
EFL
/RV
R507
2.2
KR
C508
1uF
R515
2.2
KR
R510
10KR
R511
10KR
TP6
TP7
L500
1.2
K@
100M
C502
100N
F
C503
4.7
UF
C504
100N
F
C505
4.7UF
C500
100N
F
C501
4.7
UF
L501
1.2
K@
100M
C511
4.7
UF
C512
4.7
UF
+
C513
100U
F
L509
1.2
K@
100M
L507
1.2
K@
100M
1
VC
ON
T
2
GN
D
3
OU
T
4
VD
D
U502
8W
26000011
R517
10
KR
C543
100N
F
C509
1uF
C506
1uF
C507
1uF
C551
100NF
C552
4.7UF
L508
6.8
ohm
R512
0R
R513
0R
MIC
_P
EA
R_P
MIC
_N
SPK_N
TPSPK_P
TPSPK_N
SPK_P
PC
M_SY
NC
PC
M_D
IN
PC
M_D
OU
T
PC
M_C
LK
PC
M_S
YN
C_1
V8
PC
M_D
IN_1
V8
PC
M_D
OU
T_1
V8
PC
M_C
LK
_1V
8
IIC
_SC
L_C
OD
EC
IIC
_SD
A_C
OD
EC
IIC
_SC
L
IIC
_SD
A
PC
M_C
LK
_EN
_1V
8
GPIO
42
EA
R_N
GND
GND
GND
N30516
N23004
VBA
T
VC
C_1V
8
PC
M_C
LK_1V
8
PC
M_D
OU
T_1
V8
PC
M_SY
NC
_1V
8
PC
M_D
IN_1V
8
VC
C_1V
8
IIC
_SC
L_C
OD
EC
IIC
_SD
A_C
OD
EC
MC
LK
N12047
MIC
BIA
S
MIC
BIA
S
N30612
MIC
_N
MIC
_P
SPK_P
SPK_N
MIC
BIA
S
MIC
2_N
MIC
2_P
EA
R_P
EA
R_N
VC
C_1V
8
PC
M_C
LK_EN
_1V
8
MC
LK
VD
D_3.0
V
SIM5360 Audio Application Note
AN SIM5360 Audio Application Note 2014.06.20
22
Contact us: Shanghai SIMCom Wireless Solutions Ltd. Add: Building A,SIM Technology Building,No.633,Jinzhong Road,Changning District, Shanghai,P. R. China 200335 Tel: +86 21 3235 3300 Fax: +86 21 3235 3301 URL: www.sim.com/wm