Product Info
Table Of Contents
- About the Document
- Contents
- Table Index
- Figure Index
- 1Introduction
- 2Product Concept
- 3Application Interfaces
- 3.1.General Description
- 3.2.Pin Assignment
- 3.3.Pin Description
- 3.4.Power Supply
- 3.5.Turn on and off Scenarios
- 3.6.VRTC Interface
- 3.7.Power Output
- 3.8.Battery Charge and Management
- 3.9.USB Interface
- 3.10.UART Interfaces
- 3.11.(U)SIM Interfaces
- 3.12.SD Card Interface
- 3.13.GPIO Interfaces
- 3.14.I2C Interfaces
- 3.15.ADC Interfaces
- 3.16.Motor Drive Interface
- 3.17.LCM Interface
- 3.18.Touch Panel Interface
- 3.19.Camera Interfaces
- 3.20.Sensor Interfaces
- 3.21.Audio Interfaces
- 3.22.Emergency Download Interface
- 4Wi-Fi and BT
- 5GNSS
- 6Antenna Interface
- 7Electrical, Reliability and Radio Characteristics
- 8Mechanical Dimensions
- 9Storage, Manufacturing and Packaging
- 10Appendix A References
- 11Appendix B GPRS Coding Schemes
- 12Appendix C GPRS Multi-slot Classes
- 13Appendix D EDGE Modulation and Coding Schemes
Smart LTE Module Series
SC20 Hardware Design
SC20_Hardware_Design Confidential / Released
7-83
/ 122
I
VBAT
Peak supply
current (during
transmission slot)
Maximum power control level at
EGSM900.
1.8
3.0
A
USB_VBUS
USB detection
4.35
5.0
6.3
V
VRTC
Power supply
voltage of backup
battery.
2.0
3.0
3.25
V
7.3. Charging Performance Specifications
Table 41: Charging Performance Specifications
Parameter
Min.
Typ.
Max.
Unit
Trickle charging-A current
81
90
99
mA
Trickle charging-A threshold voltage range (15.62mV steps)
2.5
2.796
2.984
V
Trickle charging-B threshold voltage range (18.75mV steps)
3.0
3.2
3.581
V
Charge voltage range (25mV steps)
4
4.2
4.775
V
Charge voltage accuracy
+/-2
%
Charge current range (90mA steps)
90
1440
mA
Charge current accuracy
+/-10
%
Charge termination current:
when charge current is from 90mA to 450mA
7
%
Charge termination current:
when charge current is from 450mA to 1440mA
7.4
%