Neoway N58 - Gpio; Gnss_Lna_En; Figure 5-35 Reference Design of VBACKUP and VRTC Power Supply

To Next Page

To Previous Page

N58 Hardware User Guide

Chapter 5 Application Interfaces

Figure 5-35 Reference design of VBACKUP and VRTC power supply

Backup

Battery or

Farad Cap

N58 Module

GNSS Chip

VBACKUP

Backup

Battery or

Farad Cap

N58 Module

RTC circuit

VRTC

0 Ω

5.6.6 GPIO

Pin Name

Pin No.

I/O

Function

Remarks

GPIO_0

GPIO, with the interruption function

Leave this pin floating if it is not

used.

GPIO_2

GPIO, with the interruption function

Leave this pin floating if it is not

used.

GPIO_3

GPIO, with the interruption function

Leave this pin floating if it is not

used.

N58 provides three GPIO interfaces, and all of these GPIO interfaces support the interruption function.

5.6.7 GNSS_LNA_EN

Pin Name

Pin No.

I/O

Function

Remarks

GNSS_LNA_EN

GNSS LNA enabling

Leave this pin floating if it is not used.

N58 provides the enabling control pin for the external GNSS low noise amplifier.

Main Page

Table of Contents3
About this Document8
Scope8
Audience8
Change History8
Conventions10
Related Documents11
Safety Recommendations12
About N5813
Product Overview13
Table 2-1 Variants and Frequency Bands Supported13
Block Diagram14
Figure 2-1 Block Diagram14
Basic Features15
Reference Standards17
Module Pins18
Pin Layout18
Figure 4-1 Pin Layout of the N58 Module (Top View)18
Pin Description19
Table 4-1 IO Type Description and DC Characteristics19
Table 4-2 Pin Description19
Application Interfaces28
Power Interface28
Vbat28
Figure 5-1 Voltage Drop of the Power Supply29
Figure 5-2 Recommended Design 129
Figure 5-3 Recommended Design 230
Figure 5-4 Recommended Design 331
Figure 5-5 Recommended Design 431
Vdd_1P833
Control Interface33
Pwrkey_N33
Figure 5-6 Reference Design of Module Startup Controlled by Button34
Figure 5-7 Reference Design of Module Startup Controlled by MCU34
Figure 5-8 Reference Design of Automatic Startup Once Powered on35
Figure 5-9 Startup Process36
Figure 5-10 Hard Shutdown Process36
Reset_N37
Figure 5-11 Module Reset Controlled by Button37
Figure 5-12 Reference Reset Circuit in Which a Triode Is Used for Isolation37
Sleep38
Figure 5-13 Reset Process of the N58 Module38
Figure 5-14 Process of Entering the Sleep Mode39
Figure 5-15 Process of Call Service Processing in Sleep Mode39
Figure 5-16 Process of Exiting from the Sleep Mode40
Peripheral Interface41
Usb41
Figure 5-17 Reference Design of the Module Sleep and Wake-Up Control Circuit41
Figure 5-18 Reference Design of the USB Connection Circuit42
Uart43
Figure 5-19 Reference Design of UART Connections44
Figure 5-20 Recommended Level Shifting Circuit 144
Figure 5-21 Recommended Level Shifting Circuit 245
Usim46
Figure 5-22 Recommended Level Shifting Circuit 346
Figure 5-23 Reference Design of USIM Card (with the Hot Plug Function) Interfaces47
Figure 5-24 Reference Design of USIM Card (Without the Hot Plug Function) Interfaces48
Sdio49
Figure 5-25 SDIO Reference Design49
Spi50
I2C51
Figure 5-26 SPI Reference Design51
Figure 5-27 I2C Reference Design51
Audio Interfaces52
Analog Audio Input Interfaces52
Figure 5-28 Reference Design of Differential MIC Input52
Analog Audio Output Interfaces53
Figure 5-29 Reference Design of the Built-In Power Amplifier53
Figure 5-30 Reference Design of the External Power Amplifier54
Video Interfaces55
Lcd55
Table 5-1 Description of LCD Function Pins55
Camera56
Other Interfaces56
Adc56
Net_Light56
Table 5-2 Description of Camera Function Pins56
Ring57
Figure 5-31 Reference Design of Driving an LED Indicator by Controlling a Triode57
Usb_Boot58
Figure 5-32 RING Prompt for an Incoming Voice Call58
Figure 5-33 RING Prompt for an SMS Message58
VBACKUP and VRTC59
Figure 5-34 Reference Design of Forcible Download59
Gpio60
Gnss_Lna_En60
Figure 5-35 Reference Design of VBACKUP and VRTC Power Supply60
Keypad61
Figure 5-36 Keypad Reference Design61
1Pps62
Vcc_Gnss_Bias62
Figure 5-37 1PPS Output Waveform62
RF Interfaces63
ANT_MAIN Antenna Interface63
Figure 5-38 Reference Design of GNSS Active Antenna Power Supply and Detection Circuit63
Figure 5-39 L-Type Matching Network64
Figure 5-40 T-Type Matching Network64
Figure 5-41 Π-Type Matching Network64
ANT_GNSS Interface65
Figure 5-42 Recommended RF PCB Design65
Figure 5-43 GNSS Structure Inside the Module66
Figure 5-44 Reference Design of an Active GNSS Antenna67
ANT_BT Interface68
Antenna Assembly68
Figure 5-45 Reference Design of a Passive GNSS Antenna68
Figure 5-46 Package Specifications of Murata's GSC RF Connector69
Figure 5-47 Module RF Connection Method69
Figure 5-48 Antenna Layout Example70
Figure 5-49 Layout Around the Antenna70
Electrical Characteristics and Reliability71
Electrical Characteristics71
Table 6-1 Electrical Characteristics of the N58 Module71
Table 6-2 Current Consumption of the N58 Module (Typical)71
Temperature Characteristics72
ESD Protection Characteristics72
Table 6-3 ESD Protection Characteristics72
RF Characteristics73
Operating Bands73
Table 7-1 Operating Bands of the N58 Module73
TX Power and RX Sensitivity74
Table 7-2 RF TX Power of the N58 Module74
Table 7-3 RF RX Sensitivity of the N58 Module74
GNSS Parameters75
Table 7-4 GNSS Parameters75
WLAN/BT Characteristics76
Table 7-5 WLAN/BT TX Power and RX Sensitivity76
Mechanical Characteristics77
Dimensions77
Figure 8-1 N58 Top and Side Dimensions (Unit: MM)77
Label78
Packaging78
Figure 8-2 N58 Label Examples78
Reel and Tape79
Moisture80
Assembly81
Module PCB Package81
Figure 9-1 Bottom View of the N58 Module PCB Package (Unit: MM)81
Application PCB Package82
Stencil82
Figure 9-2 Top View of the Recommended N58 Application PCB Package (Unit: MM)82
Solder Paste83
SMT Furnace Temperature Curve83
Figure 9-3 SMT Furnace Temperature Curve83
Abbreviations85

Neoway N58 - Gpio; Gnss_Lna_En; Figure 5-35 Reference Design of VBACKUP and VRTC Power Supply

Table of Contents

Related product manuals