User's Manual

Hardware Development Guide of Module Product
All Rights reserved, No Spreading abroad without Permission of ZTEWelink V
3.6 SD Card Interface .......................................................................................................... 18
3.6.1 Description of PINs ........................................................................................................ 18
3.6.2 Electric Feature .............................................................................................................. 19
3.6.3 Application of SD Card Interface .................................................................................... 19
3.7 USB2.0 Interface ............................................................................................................ 20
3.7.1 Description of PINs ........................................................................................................ 20
3.7.2 Electric Feature .............................................................................................................. 20
3.7.3 Application of USB Interface .......................................................................................... 20
3.8 Serial Interface ............................................................................................................... 21
3.8.1 SPI (Serial Peripheral Interface) Bus Interface .............................................................. 21
3.8.2 I2C Bus .......................................................................................................................... 22
3.8.3 UART Interface .............................................................................................................. 24
3.9 JTAG (Joint Test Action Group) Interface ...................................................................... 26
3.9.1 Description of PINs ........................................................................................................ 26
3.9.2 Application of JTAG Interface ........................................................................................ 26
3.10 Power-on/Power-off & Reset Signal .............................................................................. 26
3.10.1 Description of PINs ........................................................................................................ 26
3.10.2 Interface Application ...................................................................................................... 27
3.11 Interactive Application Interface ..................................................................................... 28
3.11.1 Description of PINs ........................................................................................................ 28
3.11.2 Interface Application ...................................................................................................... 28
3.12 LED Indicator Interface .................................................................................................. 29
3.12.1 Description of PINs ........................................................................................................ 29
3.12.2 Interface Application ...................................................................................................... 30
4 Electric Feature ............................................................................................. 31
4.1 Power Feature................................................................................................................ 31
4.1.1 Power Supply ................................................................................................................. 31
4.1.2 Working Current ............................................................................................................. 31
4.2 Power-on/Power-off Flow ............................................................................................... 32