PROJECT
TITLE
Radom.XIANG
CHECKED BY
Mountain.ZHOU
DRAWN BY
OF
A
6
5
4
3
2
1
SHEET
A
B
C
D
1
2
3
4
5
6
D
C
B
Quectel Wireless Solutions
SIZE
VER
8
8
1.0
DATE
2015/3/30
EC20 Reference Design
A2
Indicators
Indicator and Test Point
2. Refer to the document <Quectel_EC20_Hardware_Design> for more details about NET_MODE and NET_STATUS.
Notes:
1. Module STATUS is open drain output.
Reserved Test Points
Notes:
1. Both USB and debug UART interface are reserved for software debug.
3. Keep USB test points as close as possible to USB pins.
Other Design
2. USB interface can be used to upgrade firmware either.
Q802
DTC043ZEBTL
R803
2.2K
D803
Q801
DTC043ZEBTL
R802
2.2K
D802
R801
2.2K
D801
4
5
6
3
2
1
7
8
J801
D806
SD12
D807
ESD9X3.3ST5G
D805
ESD9L5.0ST5G
D804
ESD9L5.0ST5G
D808
ESD9X3.3ST5G
D809
ESD9X3.3ST5G
[1] NET_STATUS
VBAT
[1] NET_MODE
VBAT
[1] STATUS
VBAT
[1,3,8]
VBAT
[1,2]
PWRKEY
[1,2]
USB_DP
[1,2]
USB_DM
[1,2]
USB_VBUS
[1]
DBG_RXD
[1]
DBG_TXD
Quectel
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