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HUAWEI MG323 GSM M2M Module
Hardware Guide
Appendix A Circuits of Typical Interfaces
Issue 06 (2013-06-13)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
52
7 Appendix A Circuits of Typical Interfaces
Figure 7-1 Circuits of typical interfaces in the MG323 module
22μF
1
μ
F100nF330 pF
Ferr ite bea d
+
220μF
+ + + +
220μF 220μF 220μF 220 μF
LED _STAT US
LED _STAT US
nF
nF
VBAT
c
e
b
470Ω
2.2K
0.1u
VCCA
VCCB
A1
B1
B2
B3
B4
A2
A3
A4
GND OE
UART1_DTR_MCU
UART1_TD_MCU
UART1_RD_MCU
UART1_RTS_MCU
UART1_DTR_MCU
UART1_TD_MCU
UART1_RD_MCU
UART1_RTS_MCU
UART1_DTR
UA RT1_DTR
UART1_TD
UA RT1_TD
UART1_RD
UA RT1_RD
UART1_RTS
UA RT1_ R TS
100nf 1uf
VGPIO
VGPIO
10K
VGPIO
VIO
VIO
b
c
e
b
c
e
0
RESET