CR3L-IPEX Module Datasheet
Hardware Product Development > Network Modules > Wi-Fi & BLE
Dual Mode Module
Version: 20201208
Online Version
Contents
Contents
1 Product overview
2
1.1 Features................................................................................................... 2
1.2 Applications......................................................................................................... 2
2 Change history
3
3 Module interfaces
3
3.1 Dimensions and footprint............................................................................ 3
3.2 Pin definition........................................................................................................5
4 Electrical parameters
8
4.1 Absolute electrical parameters.....................................................................8
4.2 Working conditions............................................................................................. 8
4.3 RF power consumption....................................................................................... 9
4.4 Working power consumption.................................................................... 10
5 RF parameters
11
5.1 Basic RF features.......................................................................................11
5.2 TX performance.................................................................................................11
5.3 RX performance.................................................................................................13
6 Antenna
14
6.1 Antenna type..............................................................................................14
6.2 Antenna interference reduction................................................................. 14
7 Power-on sequence and resetting
15
7.1 Power-on sequence.................................................................................... 15
7.2 Resetting.................................................................................................... 15
8 Packaging information and production instructions
17
8.1 Mechanical dimensions............................................................................. 17
8.2 Recommended PCB layout............................................................................... 18
8.3 Pin header specifications........................................................................... 19
8.4 Production instructions.............................................................................. 20
8.5 Recommended oven temperature curve.................................................... 22
i
8.6 Storage conditions..................................................................................... 23
9 MOQ and packaging information
10 Appendix: Statement
Contents
24
24
ii
Contents
CR3L-IPEX is a low-power embedded WiFi+BLE module that Tuya has developed.
It con- sists of a highly integrated wireless RF chip (RTL8720CM), with an
embedded WiFi network protocol stack and varied library functions.
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1 PRODUCT OVERVIEW
1 Product overview
With the maximum CPU clock rate of 100MHz, CR3L-IPEX also contains a low-
power KM4 microcontroller unit (MCU), a WLAN MAC, a 1T1R WLAN module, 4-MB
static random- access memory (SRAM), 4-MB flash memory, and extensive
peripherals. CR3L-IPEX is an RTOS platform that integrates all function libraries of
the WiFi MAC and TCP/IP protocols. You can develop embedded WiFi products as
required.
1.1 Features
• Embedded low-power KM4 MCU, which can also function as an application pro-
cessor; Clock rate: 100MHz
• Working voltage: 3.0 to 3.6 V
• Peripherals: 9 GPIOs, 1 universal asynchronous receiver/transmitter (UART),
and 1 log transmitter
• Wi-Fi/BT connectivity
– 802.11 B/G/N20
– Channels 1 to 14 at 2.4 Ghz (channels 1 to 11 for US/CA and channels 1 to
13 for EU/CN)
– Support WEP/WPA/WPA2/WPA2 PSK (AES) security modes
– Support BLE (Bluetooth Low Energy) 4.2
– Up to +20 dBm output power in 802.11b mode
– Support SmartConfig functions for Android and iOS devices
– FPC antenna
– Passed CE and FCC certification
– Working temperature: -40℃ to 105℃
1.2 Applications
• Intelligent building
• Smart household and home appliances
• Smart socket and light
• Industrial wireless control
• Baby monitor
• Network camera
• Intelligent bus
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3 MODULE INTERFACES
Update Date
Updated Content
Version after Update
12/8/2020
This is the first release.
V1.0.0
2 Change history
3 Module interfaces
3.1 Dimensions and footprint
CR3L-IPEX has two rows of pins with a 2 mm pin spacing. Each row has 8 pins.
The CR3L-IPEX dimensions are 16±0.35 mm (W)×24±0.35 mm (L) ×2.8±0.15
mm (H). The dimensions of CR3L-IPEX are as follows:
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3 MODULE INTERFACES
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3 MODULE INTERFACES
3.2 Pin definition
The definition of interface pins is shown in the following table:
Pin Number
Symbol
I/O Type
Function
1
RST
I/O
Reaet pin, This
pin is connected
to the pin named
EN
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Pin Number
Symbol
I/O Type
Function
3 MODULE INTERFACES
2
3
4
5
6
7
8
9
10
NC
EN
A_20
A_2
A_3
A_4
VD33
GND
A_15
I/O
I/O
I/O
I/O
I/O
I/O
P
P
I/O
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It is pulled up to
be compatible
with other
modules
Enabling pin,
which works at
the high level and
is pulled up and
controlled by a
user externally
GPIOA_20, GPIO,
IC Pin1
GPIOA_2,
hardware PWM, IC
Pin18
GPIOA_3,
hardware PWM, IC
Pin19
GPIOA_4,
hardware PWM, IC
Pin20
Power supply pin
(3.3V)
Power supply
reference ground
GPIOA_15,
UART_Log_RXD,
This pin can be
used as GPIO.
3 MODULE INTERFACES
Pin Number
Symbol
I/O Type
Function
11
A_16
I/O
GPIOA_16,
UART_Log_TXD,
which is used for
displaying the
module internal
information and
can be configured
as a common
GPIO
GPIOA_17,
hardware PWM, IC
Pin38
GPIOA_18,
hardware PWM, IC
Pin39
GPIOA_19,
hardware PWM, IC
Pin40
GPIOA_13,
UART0_RXD,
which is used as a
user-side serial
interface pin
GPIOA_14,
UART0_TXD,
which is used as a
user-side serial
interface pin
12
13
14
15
16
A_17
A_18
A_19
RXD
TXD
I/O
I/O
I/O
I/O
I/O
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Note: P indicates power supply pins and I/O indicates input/output pins.
4 ELECTRICAL PARAMETERS
4 Electrical parameters
4.1 Absolute electrical parameters
Parameter
Description
Minimum
Value
Maximum
Value
Storage
temperature
Power supply
voltage
-40
-0.3
TAMB-25℃
-
125
3.6
2
Unit
℃
V
KV
TAMB-25℃
-
0.5
KV
Ts
VDD
Static
electricity
discharge
voltage
(human body
model)
Static
electricity
discharge
voltage
(machine
model)
4.2 Working conditions
Parameter
Description
Minimum
Value
Typical
Value
Maximum
Value
Unit
Ta
VDD
Working
tempera-
ture
Working
voltage
-40
3.0
105
3.6
℃
V
-
-
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Parameter
Description
Minimum
Value
Typical
Value
Maximum
Value
Unit
4 ELECTRICAL PARAMETERS
0.8
0.4
16
-
-
-
V
V
V
V
mA
pF
Average
Value
Peak Value
(Typical
Value)
Unit
mA
mA
mA
65
67
67
VIL
VIH
VOL
VOH
Imax
Cpad
2.0
2.4
-
-
-
-
I/O
low-level
input
I/O
high-level
input
I/O
low-level
output
I/O
high-level
output
I/O drive
current
Input pin
capaci-
tance
4.3 RF power consumption
TX power consumption:
Symbol
Mode
RF
RF
RF
11B 11M
11G 54M
11N HT20
MCS7
63
65
65
RX power consumption:
-
-
-
-
-
2
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4 ELECTRICAL PARAMETERS
Average
Value
Peak Value
(Typical
Value)
Symbol
Mode
IRF
IRF
IRF
11B 11M
11G 54M
11N HT20
MCS7
63
65
65
65
67
67
4.4 Working power consumption
Working
Status (Ta =
25°C)
Average
Value
Peak Value
(Typical
Value)
75
324
Unit
mA
mA
mA
Unit
mA
Working Mode
Quick
connection
network
status
Network
connection
idle state
Network
connection
operation
status
The module is
in the fast
network
connection
state and the
WiFi indicator
always
flashes
The module is
connected to
the network
and the WiFi
indicator is
always on
The module is
connected to
the network
and the WiFi
indicator is
always on
64
314
mA
66
305
mA
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5 RF PARAMETERS
Working
Status (Ta =
25°C)
Average
Value
Working Mode
Disconnected The module is
status
66
Peak Value
(Typical
Value)
309
Unit
mA
offline and
the WiFi
indicator is
dark
5 RF parameters
5.1 Basic RF features
Parameter
Description
Frequency range
2.400 to 2.4835 GHz
WiFi standard
BLE standard
IEEE 802.11b/g/n (channels 1 to 14)
Bluetooth 4.2
Data transmission rate
Data transmission rate
Data transmission rate
11g: 6, 9, 12, 18, 24, 36, 48, 54 (Mbps)
Data transmission rate
11n: HT20 MCS 0 to 7
Antenna Type
FPC antenna
5.2 TX performance
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Parameter
Typical Value
Minimum
Value
Maximum
Value
5 RF PARAMETERS
-
-
-
-
Average RF
output power,
802.11b CCK
Mode, 1
Mbit/s
Average RF
output power,
802.11g
OFDM mode,
54 Mbit/s
Average RF
output power,
802.11n
OFDM mode,
MCS7
Average RF
output power,
BLE 4.2, 1
Mbit/s
Frequency
error
-20
EVM@802.11b -
CCK 11Mbps
Mode
17.5dBm
EVM@802.11g -
OFDM
54Mbps Mode
14.5dBm
Unit
dBm
dBm
ppm
dB
14.5
dBm
13.5
dBm
-
-
-
-
20
-10
17
6.5
-
-
-
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-29
dB
5 RF PARAMETERS
Parameter
Typical Value
Minimum
Value
Maximum
Value
-
-30
Parameter
Typical Value
Minimum
Value
Maximum
Value
-
-91
EVM@802.11n -
OFDM MCS7
Mode
13.5dBm
5.3 RX performance
PER<8%, RX
sensitivity,
802.11b CCK
Mode 1M
PER<10%, RX -
sensitivity,
802.11g
OFDM Mode
54M
PER<10%, RX -
sensitivity,
802.11n
OFDM Mode
MCS7
PER<10%, RX -
sensitivity,
BLE 4.2 1M
Unit
dB
Unit
dBm
dBm
dBm
dBm
-
-
-
-
-75
-72
-93
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6 ANTENNA
6 Antenna
6.1 Antenna type
CR3L-IPEX uses FPC antenna with a gain of 3.33 dBi.
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7 POWER-ON SEQUENCE AND RESETTING
7 Power-on sequence and resetting
7.1 Power-on sequence
The RTL8720CM chip has requirements on the power-on sequence.
mended that the voltage rises from 0 to 3.3V within 40mS.
It is recom-
Symbol
Parameter
Minimum
Value
Typical
Value
Maximum
Value
Unit
mS
mS
20
20
TPRDY
CHIP_EN
3.3V ready
time
CHIP_EN
ready time
0.6
0.6
7.2 Resetting
When designing a plate of a module, you should set a reset IC at the foot of CHIP_EN
in advance. The preferable type of IC is BL8506-27NRO. The module is packaged in
the form of SOT23. For solutions to starting a module in some cases, refer to the
circuit in the following figure.
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7 POWER-ON SEQUENCE AND RESETTING
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8 PACKAGING INFORMATION AND PRODUCTION INSTRUCTIONS
8 Packaging information and production instructions
8.1 Mechanical dimensions
The mechanical dimensions of the PCB of CR3L-IPEX are 16±0.35 mm (W)×24±0.35
mm
(L) ×0.8±0.1 mm (H). The following figure shows the mechanical dimensions of
CR3L-IPEX.
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8 PACKAGING INFORMATION AND PRODUCTION INSTRUCTIONS
Note: The default dimensional tolerance is ±0.35 mm. If you have specific require-
ments on dimensions, make them clear in the datasheet after communication.
8.2 Recommended PCB layout
The following figure is a schematic diagram of CR3L-IPEX which shows how pins
corre- spond to each other.
CR3L-IPEX PCB Layout is shown as below:
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8 PACKAGING INFORMATION AND PRODUCTION INSTRUCTIONS
8.3 Pin header specifications
CR3L-IPEX has two models: CR3L-IPEX with pin headers and CR3L-IPEX without
pin headers. Which one is used depends on actual situations. Dimensions and
recommended layout of pin headers are as follows (unit: mm):
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8 PACKAGING INFORMATION AND PRODUCTION INSTRUCTIONS
8.4 Production instructions
1. Tuya’s stamp hole package module must be mounted by an SMT machine
within 24 hours after unpacking and programming of the firmware. Otherwise,
it must be packaged again under a vacuum. The module must be baked before
mounting.
• SMT equipment
– Reflow soldering machine
– Automated optical inspection (AOI) equipment
– Nozzle with a 6 mm to 8 mm diameter
• Baking equipment
– Cabinet oven
– Anti-static heat-resistant trays
– Anti-static heat-resistant gloves
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8 PACKAGING INFORMATION AND PRODUCTION INSTRUCTIONS
2. Storage conditions for a delivered module are as follows:
• The moisture-proof bag is placed in an environment where the tempera-
ture is below 30°C and the relative humidity is lower than 70%.
• The shelf life of a dry-packaged product is 6 months from the date when
the product is packaged and sealed.
• There is a humidity indicator card in the moisture-proof bag as below:
3. Bake a module based on HIC status as follows when you unpack the module
• If the 30%, 40%, and 50% circles are blue, bake the module for 2 consec-
• If the 30% circle is pink, bake the module for 4 consecutive hours.
• If the 30% and 40% circles are pink, bake the module for 6 consecutive
• If the 30%, 40%, and 50% circles are pink, bake the module for 12 consec-
package:
utive hours.
hours.
utive hours.
4. Baking settings:
• Baking temperature: 125±5°C
• Alarm temperature: 130°C
• SMT ready temperature after natural cooling: \< 36°C
• The number of drying times: 1
• Rebaking condition: The module is not soldered within 12 hours after bak-
ing
5. Do not use SMT to process modules that have been unpacked for more than
3 months, because electroless nickel/immersion gold (ENIG) is used for PCBs
and they are seriously oxidized after more than 3 months. SMT is very likely to
cause pseudo and missing soldering. Tuya is not liable for such problems and
consequences.
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8 PACKAGING INFORMATION AND PRODUCTION INSTRUCTIONS
6. Before SMT, take electrostatic discharge (ESD) protective measures.
7. To reduce the reflow defect rate, draw 10% of the products for visual inspection
and AOI before the first mounting to determine proper methods for controlling
the oven temperature and attaching and placing components. Draw 5 to 10
modules from subsequent batches each hour for visual inspection and AOI.
8.5 Recommended oven temperature curve
Perform SMT based on the following reflow oven temperature curve. The highest
temperature is 245°C. The reflow temperature curve is shown below:
Refer to IPC/JEDEC standard; Peak Temperature: \<245℃; The number of Times: ≤
2 times
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8 PACKAGING INFORMATION AND PRODUCTION INSTRUCTIONS
8.6 Storage conditions
23 / 26
10 APPENDIX: STATEMENT
9 MOQ and packaging information
Product
Number
MOQ (pcs)
Shipping
packaging
method
The number
of modules
per reel (pcs)
The number
of reels per
carton (reel)
CR3L-IPEX
3600
Tape reel
900
4
10 Appendix: Statement
FCC Caution: Any changes or modifications not expressly approved by the party
responsible for compliance could void the user’s authority to operate this device.
This device complies with Part 15 of the FCC Rules. Operation is subject to the
following two conditions: (1) This device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that
may cause undesired operation.
Note: This device has been tested and found to comply with the limits for a Class
B digital device, according to part 15 of the FCC Rules. These limits are designed
to provide reasonable protection against harmful interference in a residential instal-
lation. This device generates, uses, and can radiate radio frequency energy and, if
not installed and used following the instructions, may cause harmful interference
to radio communications. However, there is no guarantee that interference will not
occur in a particular installation.
If this device does cause harmful interference to radio or television reception, which
can be determined by turning the device off and on, the user is encouraged to try
to correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the device and receiver.
• Connect the device into an outlet on a circuit different from that to which the
receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
Radiation Exposure Statement
This device complies with FCC radiation exposure limits set forth for an uncontrolled
24 / 26
10 APPENDIX: STATEMENT
rolled environment. This device should be installed and operated with a minimum
distance of 20cm between the radiator and your body.
Important Note
This radio module must not be installed to co-locate and operating simultaneously
with other radios in the host system except following FCC multi-transmitter product
procedures. Additional testing and device authorization may be required to operate
simultaneously with other radios.
The availability of some specific channels and/or operational frequency bands are
country dependent and are firmware programmed at the factory to match the in-
tended destination. The firmware setting is not accessible by the end-user.
The host product manufacturer is responsible for compliance with any other FCC
rules that apply to the host not covered by the modular transmitter grant of certi-
fication. The final host product still requires Part 15 Subpart B compliance testing
with the modular transmitter installed.
The end-user manual shall include all required regulatory information/warnings as
shown in this manual, including “This product must be installed and operated with
a minimum distance of 20 cm between the radiator and user body”.
This device has got an FCC ID: 2ANDL-CR3L-IPEX. The end product must be labeled
in a vis- ible area with the following: “Contains Transmitter Module FCC ID: 2ANDL-
CR3L-IPEX”.
This device is intended only for OEM integrators under the following conditions:
The antenna must be installed such that 20cm is maintained between the antenna
and users, and the transmitter module may not be co-located with any other trans-
mitter or antenna.
As long as the 2 conditions above are met, further transmitter tests will not be re-
quired. However, the OEM integrator is still responsible for testing their end-product
for any additional compliance requirements required with this moduleinstalled.
Declaration of Conformity European Notice
Hereby, Hangzhou Tuya Information Technology Co., Ltd declares that this module
product is in compliance with essential requirements and other relevant provisions
25 / 26
of Directive 2014/53/EU,2011/65/EU. A copy of the Declaration of conformity can be
found at https://www.tuya.com.
10 APPENDIX: STATEMENT
This product must not be disposed of as normal household waste, in accordance with
the EU directive for waste electrical and electronic equipment (WEEE-2012/19/EU).
Instead, it should be disposed of by returning it to the point of sale, or to a municipal
recycling collection point.
The device could be used with a separation distance of 20cm to the human body.
26 / 26