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Battery Charger Interface
50 G24-L Module Hardware Description November 15, 2008
Monitoring (Full)
When the battery is fully charged and reaches above 4.20V, the charging process is stopped. The
battery charging circuit is deactivates the charging path and current from the external charger is
not required.
At this stage the battery voltage is monitored continuously by the G24-LC as it discharges. While
the battery discharges, charging may be performed in a discontinuous mode, in which the
charging circuit activates and deactivates periodically, providing low current, as required to keep
the battery fully charged.
In case the battery voltage drops below the monitoring state level, the charging process will
switch back to the charging state and provide the required current.
Figure 2-27 below depicts the charging process.
Figure 2-27: Battery Charging Process
CC State
Pre-Char
g
e
Charging 1
s
t
Stage
t
4.20V
Full Current
(500mA)
3.60V
2
n
d
Sta
g
e
3
r
d
Sta
g
e
250mA
120mA
150mA
25mA
3.30V
Under Voltage
Full stage
- Technical Information 1
- Copyrights 2
- Computer Software Copyrights 2
- Trademarks 3
- Table of Contents 5
- Table of Contents 6
- List of Figures 9
- List of Tables 11
- Manual Scope 13
- Target Audience 13
- Manual Organization 13
- Applicable Documents 14
- Regulatory Requirements 14
- User Operation 15
- Antenna Installation 15
- Standards 16
- Contact Us 16
- Text Conventions 17
- General Safety 18
- Batteries 19
- Dangerous procedure warnings 19
- Caring for the Environment 20
- Limitation of Liability 21
- Warranty Notification 22
- How to Get Warranty Service? 22
- Claiming 23
- Conditions 23
- Installed Data 24
- Out of Warranty Repairs 24
- Revision History 25
- Chapter 1: Introduction 27
- Product Specifications 28
- Regulatory Approvals 31
- Architecture Overview 33
- Digital Block 34
- Analog Block 34
- GSM Transceiver Block 34
- Operating Modes 35
- Power Supply 36
- Power Consumption 37
- GPRS-RMS 38
- Power On/Off Operation 39
- Turning the G24-L Off 41
- Power Loss shut down 42
- Low Power Mode 43
- Terminating Low Power Mode 44
- Using the WKUPI_N signal 45
- Incoming Network Data 45
- Data on the Serial interface 46
- Real Time Clock 47
- Serial Interfaces 48
- SIM Interface 49
- SIM Connection 50
- SIM Design Guidelines 50
- Audio Interface 52
- Headset Microphone Port 53
- Speaker Port 54
- Ω at the 55
- Headset Detection 56
- Alert Loudspeaker Port 57
- Digital Audio Interface 58
- Audio Programming Interface 60
- Audio Algorithms 61
- Gain Control 62
- Audio Design 63
- Analog Ground 64
- A/D Interface 65
- Power Supply A/D 66
- Battery Temperature A/D 66
- VREF Reference Regulator 68
- Wakeup Out 69
- Antenna Detection 71
- GPRS Detection 71
- Transmission Indicator 71
- General Purpose I/O 71
- Antenna Interface 72
- Battery Charger Interface 73
- Pin # Signal Name Description 74
- Battery Charging Process 75
- Monitoring (Full) 76
- Protection and Safety 77
- Absolute Maximum Ratings 79
- Environmental Specifications 80
- USB_VBUS 82
- SIM_PD_N 82
- SIM_RST_ 82
- IN-ACTIVE 85
- Board Dimensions 87
- Mating Connector 89
- RF Connector Specifications 90
- G24-L Mounting 92
- Who to Contact? 93
- Required Query Information 93
- Motorola Workflow 94
- Service Centers 95
- Testing a Standalone Unit 96
- Figure 5-1: Test Setup 97
- Test Procedure 98
- Acronyms and Abbreviations 99
- Index U - U 104
- 6802984C05-D 106
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