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AF20
Quectel AF20 User Manual
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Wi-Fi&Blueto
oth
Module
Series
AF20_Hardw
are_Design
22
/
49
3.5.2.
SDIO
Interface
The
following
table
s
hows
the
pi
n
def
inition
of
the
SD
IO
inte
rface
of
AF20.
Table
7:
Pin
Definition
of
SD
IO
Inte
rface
Pin
Name
Pin
No.
I/O
Description
Comment
SDIO_D3
22
DIO
SDIO
data
bit
3
1.8
V
power
domain
SDIO_D2
23
DIO
SDIO
data
bit
2
1.8
V
power
domain.
It
is
pulled
up
to
1.8
V
internally
.
SDIO_D1
24
DIO
SDIO
data
bit
1
1.8
V
power
domain
SDIO_D0
25
DIO
SDIO
data
bit
0
SDIO_CLK
26
DI
SDIO
clock
SDIO_CMD
27
DIO
SDIO
c
ommand
22
24
Table of Contents
Safety Information
4
About the Document
6
Table of Contents
7
Contents
7
Introduction
11
Special Mark
11
Product Overview
12
Key Features
12
Functional Diagram
14
EVB Kit
14
Application Interfaces
15
General Description
15
Pin Assignment
16
Pin Description
17
Power Supply
20
Wi-Fi Application Interface
22
Wlan_En
22
SDIO Interface
23
Bluetooth Application Interface
24
Bt_En
25
PCM Interface
25
Bluetooth UART
26
Coexistence UART
27
RF Antenna Interface
28
Pin Definition of the RF Antenna Interface
28
Operating Frequency
28
Reference Design
28
RF Routing Guidelines
29
Requirements for Antenna Design
31
RF Connector Recommendation
31
Electrical Characteristics & Reliability
34
Absolute Maximum Ratings
34
Digital I/O Characteristics
34
Power Consumption
35
RF Performances
36
ESD Protection
38
Mechanical Information
39
Mechanical Dimensions
39
Recommended Footprint
41
Top and Bottom Views
42
Storage, Manufacturing and Packaging
43
Storage Conditions
43
Manufacturing and Soldering
44
Packaging Specification
46
Carrier Tape
46
Plastic Reel
47
Packaging Process
47
Appendix References
49
4
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Quectel AF20 Specifications
General
Brand
Quectel
Model
AF20
Category
GSM/GPRS Modules
Language
English
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