USR IOT USR-C322 User manual

USR-C322 Hardware Manual www.usriot.com
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USR-C322 Hardware Manual
File version: 1.2.01

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Content
USR-C322 Hardware Manual ...................................................................................................... 1
1. Product Overview ................................................................................................................... 3
1.1. Dimension ..................................................................................................................... 3
1.2. Encapsulation Size......................................................................................................... 3
1.3. Pin Definition................................................................................................................. 4
2. Hardware Design .................................................................................................................... 6
2.1. Typical Connection ........................................................................................................ 6
2.2. Power Interface............................................................................................................. 6
2.3. UART Interface.............................................................................................................. 7
2.4. Reset and Reload........................................................................................................... 7
2.5. Antenna......................................................................................................................... 8
3. Contact ................................................................................................................................... 9
4. Disclaimer............................................................................................................................... 9
5. Update History........................................................................................................................ 9

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1.Product Overview
1.1. Dimension
Module size:18.22*26.65*2.80mm, error ±0.2mm, pin size as follows:
Figure 1 Dimension
1.2. Encapsulation Size
Figure 2 Encapsulation size
You can download PCB library from http://www.usriot.com/pcb-library-usr-c322-wifi-module/.

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1.3. Pin Definition
PIN
Name
Definition
1
GND
Power Ground
2
GPIO
GPIO
3
GPIO
GPIO
4
nReset
Reset module, take effect in low level
5
SOP2
Pull up when upgrading the firmware version by serial port
6
SOP1
Pin floating
7
SOP0
Pin floating
8
ANA DC-DC
RF power output pin, pin floating
9
NC
Not available
10
NC
Not available
11
GND
Power Ground
12
GND
Power Ground
13
VBT_CC
Power input pin, connect to 3.3V
14
VDD_ANA2
Power input pin, connect to 3.3V
15
GPIO
GPIO
16
NC
Not available
17
GND
Power Ground
18
GPIO
GPIO
19
UART0_TX
Serial port 0 TX Pin
20
UART0_RX
Serial port 0 RX Pin
21
nReload
Take effect in low level.Keep low level 1-3s to enter simplelink
mode,over 3s to restore factory settings

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22
nReady
Indication pin for module working normally, take effect in low level.
Can connect to external LED.
23
nLink
Indication pin for module WIFI connecting successfully, take effect
in low level. Can connect to external LED
24
UART0_CTS
Serial port 0 flow control CTS pin
25
UART0_RTS
Serial port 0 flow control RTS pin, can control the RS485
enable/disable
26
GPIO
GPIO
27
GPIO
GPIO
28
GND
Power Ground
29
GND
Power Ground
30
UART1_TX
Serial port 1 TX Pin
31
UART1_RX
Serial port 1 RX Pin
32
GPIO
GPIO
33
GPIO
GPIO
34
GPIO
GPIO
35
GPIO
GPIO
36
GPIO
GPIO
37
GPIO
GPIO
38
GPIO
GPIO
39
NC
Not available
40
NC
Not available
41
GPIO
GPIO
42
NC
Not available
43
NC
Not available
44
GND
Power Ground
Figure 3 Pin definition

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2.Hardware Design
2.1. Typical Connection
Figure 4 Typical connection
2.2. Power Interface
Switching power supply is recommended. Working voltage VCC range from 3.0V~3.6V, 3.3V is
recommended. Power the module by main power pin, pin interface is in parallel with appropriate
energy-storage capacitance and high frequency capacitance. Circuit diagram as follows:
Figure 5 Power interface

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2.3. UART Interface
When communicate to MCU with 3.3V, just connecting TXD of module to RXD of MCU and RXD of module to
TXD of MCU.
When communicate to MCU with 5V, switching circuit is necessary.
Switching circuit diagram as follows:
Figure 6 UART interface
2.4. Reset and Reload
nReload: nReload pin can connect to external button or configuration pin. Press button 1s to 3s to enter
simplelink mode, press over 3s to restore factory settings. nReload pin should connect to external 4.7k-10k
Ohm pull-up resistor.
nReset: Resetting the module and taking effect in low level. nReset pin connect to internal 100K Ohm pull-up
resistor to 3.3V. Press over 0.5s and release to reset the device.
Circuit diagram as follows:
Figure 7 Reset and Reload

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2.5. Antenna
USR-C322 have internally installed antenna.
Note:
1. On PCB board, user can’t place component on antenna part.
2. Keep antenna away from metal, inductance or some other interference source.
3. Ensure antenna locate on margin of PCB board.

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3.Contact
Company: Jinan USR IOT Technology Limited
Address: Floor 11, Building No.1, No.1166, Xinluo Street, Gaoxin District, Jinan city, Shandong province,
250101 China
Tel: [phone]
Web: www.usriot.com
Support: h.usriot.com
Email: [e-mail]
4.Disclaimer
This document provide the information of USR-C322 products, it hasn’t been granted any intellectual property
license by forbidding speak or other ways either explicitly or implicitly. Except the duty declared in sales terms
and conditions, we don’t take any other responsibilities. We don’t warrant the products sales and use
explicitly or implicitly, including particular purpose merchantability and marketability, the tort liability of any
other patent right, copyright, intellectual property right. We may modify specification and description at any
time without prior notice.
5.Update History
2017-09-20 V1.2.01 created.