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
3-23
/ 122
3.3. Pin Description
The following tables show the SC20’s pin definition.
Table 7: I/O Parameters Definition
Type
Description
IO
Bidirectional
DI
Digital input
DO
Digital output
PI
Power input
PO
Power output
AI
Analog input
AO
Analog output
OD
Open drain
Table 8: Pin Description
Power Supply
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
VBAT_BB
1, 2
PI
Power supply for
module’s
baseband part.
Vmax=4.2V
Vmin=3.5V
Vnorm=3.8V
It must be able to
provide sufficient
current up to 3.0A.
It is suggested to
use a zener diode
for voltage
stabilization.
VBAT_RF
145, 146
PI
Power supply for
module’s RF part.
Vmax=4.2V
Vmin=3.5V
Vnorm=3.8V
VRTC
126
PI/PO
Power supply for
internal RTC
circuit.
V
O
max=3.2V
V
I
=2.0V~3.25V
If unused, keep this
pin open.
LDO5_1V8
111
PO
1.8V output power
supply
Vnorm=1.8V
I
O
max=20mA
Power supply for
external GPIO’s pull
up circuits and level
conversion circuit.