Quectel AF20 User Manual

Wi-Fi&Bluetooth Module Series
AF20_Hardware_Design
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3.4. Power Supply
The following table shows the power supply pins and the ground pins of AF20 module. The VIO can be
powered by VDD_EXT of AG35 module.
Table 5: Power Supply Pins and GND Pins
on third-party
platforms.
RXD
Bluetooth
coexistence signal -
receive data
V
IL
max = 0.54 V
V
IH
min = 1.26 V
V
IH
max = 2.0 V
RF Antenna Interface
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
RF_ANT
30
AIO
Wi-Fi and Bluetooth
antenna
50 Ω impedance
32KHZ_IN
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
32KHZ_IN
19
DI
Used as a timer in
low power modes.
External 32.768 kHz
clock input is
required in sleep
mode.
V
IL
min = -0.3 V
V
IL
max = 0.54 V
V
IH
min = 1.26 V
V
IH
max = 2.0 V
1.8 V power domain.
If unused, keep this pin
open.
RESERVED Pins
Pin Name
Pin No.
Comment
RESERVED
2, 3, 4, 32–35, 37, 41, 47
Keep these pins
open.
Pin Name
Pin
No.
IO
Description
Min.
Typ.
Max.
Unit
VDD_3V3
21
PI
Main power supply for the module
3.14
3.3
3.46
V
VIO
11
PI
Power supply for module’s I/O pins
1.71
1.8
1.89
V
GND
1, 12, 20, 28, 29, 31, 36, 38–40, 43–45, 48–52

Quectel AF20 Specifications

General

Brand	Quectel
Model	AF20
Category	GSM/GPRS Modules
Language	English