Document information ................................................................................................................................ 2

Contents .......................................................................................................................................................... 3

System description ............................................................................................................................... 6

1.1 Overview ........................................................................................................................................................ 6

1.2 Product features ......................................................................................................................................... 6

1.3 Architecture ................................................................................................................................................. 8

1.4 Pin-out ........................................................................................................................................................... 9

1.5 Operating modes .......................................................................................................................................13

1.5.1

Overview ..........................................................................................................................................13

1.5.2

Cellular operating modes ............................................................................................................14

1.5.3

GNSS operating modes ...............................................................................................................14

1.6 Cellular power management ...................................................................................................................16

1.6.1

Cellular supply input (VCC) .........................................................................................................16

1.6.2

Cellular RTC supply input / output (V_BCKP) ..........................................................................20

1.6.3

Cellular generic digital interfaces supply output (V_INT) .....................................................20

1.7 Cellular system function interfaces ......................................................................................................20

1.7.1

Cellular system power-on ............................................................................................................20

1.7.2

Cellular system power-off ...........................................................................................................21

1.7.3

Cellular system reset ...................................................................................................................23

1.8 Cellular antenna interface .......................................................................................................................23

1.8.1

Cellular antenna RF interface (ANT) .........................................................................................23

1.8.2

Cellular antenna detection (ANT_DET) ....................................................................................24

1.8.3

Cellular antenna dynamic tuning interface (RFCTRL1 / RFCTRL2) ...................................25

1.9 Cellular SIM interface ...............................................................................................................................25

1.9.1

Cellular SIM card / chip interface ...............................................................................................25

1.9.2

Cellular SIM card detection interface .......................................................................................25

1.10 Cellular serial communication interfaces ............................................................................................25

1.10.1

Cellular UART interfaces .............................................................................................................26

1.10.2

Cellular USB interface ..................................................................................................................27

1.10.3

Cellular I2C interface ....................................................................................................................28

1.11 Cellular audio interface ............................................................................................................................29

1.12 Cellular clock output .................................................................................................................................29

1.13 Cellular General Purpose Input/Output (GPIO)....................................................................................29

1.14 Reserved pins (RSVD) ..............................................................................................................................29

1.15 GNSS power management ......................................................................................................................30

1.15.1

GNSS supply input (VCC_GNSS) ...............................................................................................30

1.15.2

GNSS backup supply input (VBCKP_GNSS) ............................................................................30

1.16 GNSS antenna interface ..........................................................................................................................30

1.16.1

GNSS antenna RF interface (ANT_GNSS) ...............................................................................30

1.16.2

GNSS LNA or antenna on/off control (ANT_ON) ....................................................................30

UBX-22015376 - R02

C1-Public

LENA-R8 series - System integration manual

Contents

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