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UC20&M10 Reference Design Explanation D
l e t l c a e i t u n Q ide f n o C
D
1. The difference on the interface between UC20 and M10. Refer to the document for more details.
2. The explanation of compliant footprint.
Refer to the document and our reference footprint for more details.
3. The difference on the voltage level between UC20 and M10. VBAT
C UC20
3.4~4.3
M10
3.3~4.6
VDD_EXT
VRTC
1.8
1.5~3.2
1.8
1.8
2.8
1.5~3.3
VBAT
2.8
PWRKEY RESET_N/EMERG_OFF NET_STATUS/NETLIGHT
ADC
UART
ANT_MAIN
1.8
0.2~2.1
1.8
GSM+WCDMA
2.8
0~2.8
2.8
GSM Quad-band
C
4. The explanation of compliant circuit. Refer to the related sheet for details.
5. Index of reference design. B
B
Sheet 1: Design Explanation Sheet 2: Module Interface
Sheet 3: Power Supply Design
Sheet 4: UART and SIM Design Sheet 5: Audio Design
Sheet 6: RF and GPS Design Sheet 7: Other Designs Sheet 8: MCU Interface
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0R
GND GND GND GND GND GND GND GND
ANT_GPS GND ADC0 ADC1 RESERVED I2C_SDA I2C_SCL RESERVED RESERVED RESERVED RESERVED
19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
[2,4] SIM_GND [2,7] DBG_RXD [2,7] DBG_TXD [2,4] SIM_PRESENCE [2,4] SIM_VDD [2,4] SIM_DATA [2,4] SIM_CLK [2,4] SIM_RST [2,3] VRTC
GND GND SIM_GND DBG_RXD DBG_TXD SIM_PRESENCE SIM_VDD SIM_DATA SIM_CLK SIM_RST VRTC
[2]RESET_N [2,7]PWRKEY
R210
B
0R NM_0R
R203 R204
0R NM_0R
R205 R206 R207 R208
0R NM_0R 0R NM_0R
ANT_MAIN [6]
47 46 45 44 43 42 R211 41 R212 40 39 38 37
ANT_GPS [6]
ADC0 [7] ADC1 [7]
0R 0R
73 74 75 76 77 78 79 80 81 82 83 84
GND GND GND GND GND GND GND GND GND GND GND GND
RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED
104 103 102 101 100 99 98 97 96 95 94 93
For UC20, it is used to reset the module. For M10, it is EMERG_OFF used to turn off the module. RESET_N [2] Q201
[8] RESET_MCU
DTC043ZEBTL
C It is used to turn on and off the module.
I2C_SDA [5] I2C_SCL [5]
PWRKEY [2,7]
UC20&M10
Q202
[8] ON/OFF_MCU
DTC043ZEBTL
UC20&M10
R209 0R
R201 R202
54 53 52 51 50 49 48
D
GND GND GND GND GND GND GND GND
C
GND GND GND GND GND ANT_MAIN GND
85 86 87 88 89 90 91 92
8 9 10 11 12 13 14 15 16 17 18
112 111 110 109 108 107 106 105
72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55
R213
R216 R215 R214 [7] NET_MODE [2,7] NET_STATUS [2,4,5] VDD_EXT
RESERVED RESERVED RESERVED RESERVED NET_MODE NET_STATUS VDD_EXT
U201-B
GND RESET_N PWRKEY AGND RESERVED PCM_IN PCM_OUT PCM_SYNC PCM_CLK RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED GPS_VDD ANT_DIV GND
1 2 3 4 5 6 7
1
Module Interface
GND USB_VBUS USB_DM USB_DP RXD TXD DTR RTS CTS DCD RI STATUS VBAT_BB VBAT_BB VBAT_RF VBAT_RF GND BOOT_KEY
U201-A
2
l e t l c a e i t u n Q ide f n o C
0R 0R 0R
D
3
BOOT_KEY [7]
4 VBAT_BB [3] VBAT_RF [3]
5 USB_VBUS [7,8] USB_DM [7,8] USB_DP [7,8] RXD [4,7] TXD [4,7] DTR [4] RTS [4] CTS [4] DCD [4] RI [4] STATUS [7]
6
0R
U201-C
ANT_DIV [6]
113 114 115 116 117 118 119 120
GPS_VDD [6] PCM_CLK [5] MIC1N [5]
PCM_SYNC [5] MIC1P [5]
PCM_OUT [5] SPK1P [5] PCM_IN [5] SPK1N [5]
[2,7] NET_STATUS [2,4,5] VDD_EXT [2,4] SIM_GND
M10:SD_DATA M10:DBG_RXD M10:SD_CLK M10:DBG_TXD M10:SD_CMD M10:SIM_PRESENCE M10:RESERVED M10:SIM_VDD M10:RESERVED M10:SIM_DATA M10:NETLIGHT M10:SIM_CLK M10:VDD_EXT M10:SIM_RST M10:GND M10:VRTC
121 122 123 124 125 126 127 128
DBG_RXD [2,7] DBG_TXD [2,7] SIM_PRESENCE [2,4] SIM_VDD [2,4] SIM_DATA [2,4] SIM_CLK [2,4] SIM_RST [2,4] VRTC [2,3]
B
UC20&M10
When M10 is applied, SIM_GND connects to M10 GND pin.
Notes:
1.The SMD difference between UC20 and M10.
Intended audience M10 UC20
Installed
Not installed
R202, R204, R206, R208
R201, R203, R205, R207, R209~R216
R201, R203, R205, R207, R209~R216
R202, R204, R206, R208
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A 2.Please refer to sheet 1 and M10 and UC20 Hardware Design respectively for further details about the difference between them.
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3.Keep all reserved pins open.
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Power Supply Design
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LDO Application
D
D
It is used when the input voltage is below 7V.
R301
51K
ADJ
+
R302 100K 1%
C303
C304 C305
100uF 75pF 15pF
B301
[2] VRTC
5
100nF
3
100uF
VBAT
4
OUT
EN
C302
1
+
C301
IN
GND
2
DC_IN
VRTC Design
MIC29302BU
U301
+ 5V
R303 47K 1%
C313 + NM_100uF
If not used, keep this open.
VBAT = (R302/R303+1)*1.24 = 3.88V
C
XH414
C
DC-DC Application
1.It is used when the input voltage is above 9V in the vehicle application.
Power for PCM Codec and ADC Circuit
2.Use DC-DC to convert high input voltage to 5V,
and LDO will generate 3.8V typical voltage for the module.
DC-DC
DC 5V out
LDO
DC 3.8V out for module
C314
C315
1uF
100nF
R304
51K
3
EN
GND
e.g. DC12V IN
SGM2019-ADJ 5 OUT BP
R305 75K 1%
4
2
U302 1 IN
VBAT
VDD_3V3 C316
C317
4.7uF 100nF
R306 43K 1%
B
B
VBAT Design VBAT
Vout = (R305/R306+1)*1.207 = 3.3V
FB301 0603 FBMH1608HM101-T
VBAT_RF [2]
0603 FB302 FBMH1608HM331-T
PZ3D4V2H
100uF
C307
C308
100nF
33pF
C309
C318
+
C306
+
D301
VBAT_BB [2]
10pF 100uF
C310
C311 C312
100nF 33pF 10pF
Close to the module VBAT pins Notes:
1.VBAT should be routed in star mode to VBAT_BB and VBAT_RF net.
A
2.The rated current of FB301 and FB302 should be more than 1.6A.
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UART and SIM Design
l e t l c a e i t u n Q ide f n o C
UART Level Translator
3
[2] RI
4
[2] DCD
5
[2] RTS
6
[2,7] RXD
7
[2] DTR
8
[2] CTS [2,7] TXD VDD_EXT
9 R403
10K
10
VCCA A2 A3 A4 A5 A6 A7 A8 OE
B1
VCCB B2 B3 B4 B5 B6 B7 B8
GND
TXB0108PWR C401
R404
100nF
120K
20
R402
51K
19
R408 NM_15K
VDD_MCU
18
R409 51K
RI_M [8]
17
J401
DCD_M [8]
16
RTS_M [8]
15
[2]SIM_RST
RXD_M [8]
14
[2] SIM_CLK
DTR_M [8]
13
CTS_M [8]
12
R405
22R
R406
22R
[2] SIM_DATA
R407
RST
VPP
CLK
I/O
SIM_GND [2]
C
22R
C402
C403
C404 C405
33pF
33pF
33pF
U402
ESDA6V8AV6
Notes:
1.TXB0108 is to realise the voltage level translation between UC20/M10 and MCU.
B
GND
Molex 91228
100nF
Notes:
VCC
PRESENCE
[2] SIM_PRESENCE
TXD_M [8]
11
C406 100nF
6
2
VDD_EXT
A1
VDD_EXT
5
1
SIM_VDD
4
51K
SIM_VDD
2
U401
3
R401
D
SIM Design
1
D
C
1
2.This circuit is available for both UC20 and M10 UART voltage level translation design. 3.VCCA should not exceed VCCB.
1.R405~R407 are applied to suppress the EMI spurious transmission
B
and enhance the ESD protection.
2.R408 is reserved to improve anti-jamming capability for long SIM_DATA layout trace.
For more information about TXB0108, please refer to the datasheet.
3.SIM_PRESENCE is used to detect SIM card, which will be low when the SIM card is inserted. This function on UC20 is not supported currently.
4.The value of C406 should be less than 1uF.
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Audio Design
l e t l c a e i t u n Q ide f n o C PCM Codec Circuit
D
0R
R510
D
VDD_3V3
C511 10uF
C512
C510 4.7uF
4.7uF
[5] MIC[5] MIC+
100nF
R501 R502 R503 R504
19
SPKOUT-
20
VDDSPK
21
AUX
22
23
R505 0R
7
[2] PCM_IN [2] PCM_OUT [2] PCM_SYNC [2] PCM_CLK
VREF
MIC+
SCLK
22R 22R 22R 22R
C505 C506 C507
C508
NM
22pF
NM
16
15 R509 10K
NM
R507 10K
14
100nF
4.7uF
R513 1K
C517 1uF
[5] MIC+
VDD_EXT
MIC1P [2,5]
C519
R508 10K
10uF
C518 1uF
[5] MIC-
MIC1N [2,5]
I2C_SDA [2]
13
I2C_SCL [2]
NAU8814
VDD_3V3
C
R515 1.5K
25
AGND
CS
4.7uF 100nF 4.7uF
VSSD
12
6
C504
SDIN
SPK1P [2,5]
R506 10K
C
C503
VDDB
MCLK
VDD_3V3
11
5
C516
R514 1.5K
17
MODE
VDDC
BCLK
4
MOUT
10
VDD_EXT
VSSA
FS
3
SPKOUT+
C515
18
VSSSPK
VDDA
9
2
DACIN
[5] VDDA
MICBIAS
8
1
ADCOUT
[5] MICBIAS
MIC-
24
SPK1N [2,5]
U501
C501 C502
R512 0R
[5] MICBIAS
C509 100nF
R511
R516 1K
0R
VDDA [5]
C513
C514
4.7uF
100nF
This circuit is available for UC20 audio applicaion only.
Audio Channel - Earphone
B [2,5] MIC1N [2,5] SPK1P
C532
C535 22uF
10pF
C533 33pF
C536 C537 C538 NM
10pF
C534
4.7uF
Audio Channel - Handset
Close to
earphone interface
[2,5] MIC1P C539
C540
10pF
33pF
R517
D505
C521
C522
C523 C524 C525
10pF
33pF
10pF
33pF
D501
PESD5V0S1BL D502
10pF 33pF
4 1 3 2
[2,5] MIC1P [2,5] MIC1N [2,5] SPK1P [2,5] SPK1N
33pF
3 4 2 1
C520
J502
Earphone
D506
C526 C527
C528 C529 C530 C531
10pF 33pF
10pF 33pF
D503
D504
10pF 33pF
B
J501
HANDSETCON
PESD5V0S1BL
PESD5V0S1BL
0R
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