User's Manual

LZT 123 1834 5
2.6.2 RADIO FREQUENCY (RF) EXPOSURE AND SAR .....................................................22
2.6.3 PERSONAL MEDICAL DEVICES ............................................................................ 22
2.6.4 DISPOSAL OF OLD ELECTRONIC EQUIPMENT ...................................................... 23
2.7 PRODUCT MARKING.................................................................................................23
3 Abbreviations ....................................................................................... 24
Integrating the Wireless Modem.................................................................. 26
4 Mechanical Description ......................................................................... 27
4.1 INTERFACE DESCRIPTION .........................................................................................27
4.2 PHYSICAL DIMENSIONS ............................................................................................29
5 System Connector Interface .................................................................. 31
5.1 OVERVIEW................................................................................................................ 31
5.2 DEALING WITH UNUSED PINS.................................................................................... 34
5.3 GENERAL ELECTRICAL AND LOGICAL CHARACTERISTICS ........................................... 36
5.3.1 LEVEL SHIFTER INTERFACES...............................................................................36
5.3.1.1 COMMON LEVEL SHIFTER INTERFACE ............................................................. 36
5.3.1.2 I2C LEVEL SHIFTER INTERFACE ....................................................................... 38
5.4 GROUNDS................................................................................................................39
5.4.1 ANALOGUE GROUND (AREF) ..............................................................................39
5.4.2 COMMON GROUND (GND)................................................................................. 39
5.5 REGULATED POWER SUPPLY INPUT (VCC) .................................................................. 40
5.6 VOLTAGE REFERENCE (VREF) .................................................................................... 41
5.6.1 VREF AS AN OUTPUT.........................................................................................41
5.6.2 VREF AS AN INPUT ............................................................................................42
5.7 BATTERY CHARGING INPUT (CHG_IN) ....................................................................... 43
5.7.1 CHARGING PROCESS ......................................................................................... 44
5.7.2 SERIES DIODE.................................................................................................... 45
5.7.3 BATTERY SELECTION ......................................................................................... 45
5.8 POWERING THE MODULE ON AND OFF (ON/OFF) ...................................................... 49