RN4020 Datasheet PDF - Microchip


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RN4020
Microchip

Part Number RN4020
Description Bluetooth Low Energy Module
Page 28 Pages

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RN4020
Bluetooth® Low Energy Module
Features
• Fully certified Bluetooth® version 4.1 module
• On-board Bluetooth Low Energy 4.1 stack
• ASCII command interface API over UART
• Device Firmware Upgrade (DFU) over UART or Over
the Air (OTA)
• Microchip Low-energy Data Profile (MLDP) for serial
data applications
• Remote commands over-the-air
• 64 KB internal flash
• Compact form factor: 11.5 x 19.5 x 2.5 mm
• Castellated SMT pads for easy and reliable PCB
mounting
• Environmentally friendly, RoHS compliant
• Certifications: FCC, IC, CE, QDID, VCCI, KCC, and
NCC
Operational
• Single operating voltage: 1.8V to 3.6V (3.3V typical)
• Temperature range: -30°C to 85°C
• Low-power consumption
• Simple, UART interface
• Integrated Crystal, I2C Interface, Internal Voltage
Regulator, Matching Circuitry, and PCB Antenna
• Multiple IOs for control and status
• GPIO, ADC
• Three Pulse Width Modulation (PWM) outputs
RF/Analog Features
• ISM Band 2.402 to 2.480 GHz operation
• Channels 0-39
• RX Sensitivity: -92.5 dBm at 0.1% BER
• TX Power: -19.0 dBm to +7.5 dBm
• RSSI Monitor
MAC/Baseband/Higher Layer Features
• Secure AES128 encryption
• GAP, GATT, SM, L2CAP, and integrated public
profiles
• Create custom services using command API
• Keyboard I/O Authentication
• Software configurable role as peripheral or central
and client or server
• Built-in scripting capabilities for hostless operation
Applications
• Health/Medical Devices
- Glucose meters
- Heart rate
- Scale
• Sports Activity and Fitness
- Pedometer
- Cycling computer
- Heart rate
• Retail
- Point of Sale (POS)
- Asset tagging and tracking
- Proximity advertising
• Beacon Applications
• Internet of Things (IoT) Sensor tag
• Remote Control
- Embedded Device Control
- AV consoles and game controllers
• Wearable Smart Devices and Accessories
• Industrial Control
- Private (custom) services
- Low bandwidth cable replacement
• Smart Energy/Smart Home
Description
Microchip’s RN4020 Bluetooth Low Energy Module pro-
vides a highly integrated solution for delivering low-power
Bluetooth 4.1 solutions. The advanced command inter-
face offers rapid time to market. The RN4020 module
complies with Bluetooth specification version 4.1. The
module integrates RF, a baseband controller, and a com-
mand API processor, making it a complete Bluetooth Low
Energy solution. The RN4020 can be used with ultra-low
cost microcontroller for intelligent Bluetooth Low Energy
applications. For simple sensor applications, the RN4020
internal scripting capabilities enable basic functions to be
implemented without the need for external host MCU or
software development tools.
2015 Microchip Technology Inc.
DS50002279B-page 1



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RN4020
Table of Contents
1.0 Device Overview........................................................................................................................................................................... 3
2.0 General Specifications .................................................................................................................................................................. 6
3.0 Microcontroller to RN4020 Interface ............................................................................................................................................. 7
4.0 Physical Dimensions .................................................................................................................................................................... 8
5.0 Typical Application Schematic .................................................................................................................................................... 11
6.0 ASCII Command API .................................................................................................................................................................. 12
7.0 Supported Services .................................................................................................................................................................... 13
8.0 Regulatory Approval ................................................................................................................................................................... 15
9.0 Ordering Information................................................................................................................................................................... 21
Appendix A: Revision History ............................................................................................................................................................... 23
The Microchip Web Site ....................................................................................................................................................................... 25
Customer Change Notification Service ................................................................................................................................................ 25
Customer Support ................................................................................................................................................................................ 25
TO OUR VALUED CUSTOMERS
It is our intention to provide our valued customers with the best documentation possible to ensure successful use of your Microchip
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Most Current Data Sheet
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http://www.microchip.com
You can determine the version of a data sheet by examining its literature number found on the bottom outside corner of any page.
The last character of the literature number is the version number, (e.g., DS30000000A is version A of document DS30000000).
Errata
An errata sheet, describing minor operational differences from the data sheet and recommended workarounds, may exist for current
devices. As device/documentation issues become known to us, we will publish an errata sheet. The errata will specify the revision
of silicon and revision of document to which it applies.
To determine if an errata sheet exists for a particular device, please check with one of the following:
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When contacting a sales office, please specify which device, revision of silicon and data sheet (include literature number) you are
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DS50002279B-page 2
2015 Microchip Technology Inc.



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1.0 DEVICE OVERVIEW
The RN4020 Bluetooth Low Energy RF module
integrates Bluetooth 4.1 radio baseband, MCU, digital
analog I/O, on-board stack, and ASCII command API.
Figure 1-1 shows the top view of the module. The
pinout of the module is shown in Figure 1-2, and the
description is presented in Table 1-1. Figure 1-3 lists all
the key components of the module.
FIGURE 1-1:
RN4020 TOP VIEW
RN4020
FIGURE 1-2:
RN4020 PIN DIAGRAM

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FIGURE 1-3:
RN4020 BLOCK DIAGRAM
RN4020 Bluetooth© 4.1 Low Energy Module
High-Performance
Integrated Antenna
UART Interface
3x Analog I/O
4 PWM I/O, I2C Comm.
UART
10-bit ADC
GPIO
128b AES Encryption
Radio
Modem
BTLE v 4.1 Core
with BT SIG Certified
Firmware GATT/GAP
VReg
64KB serial
Flash for
User profiles
and scripts
1.8 3.6V
Crystal
2015 Microchip Technology Inc.
DS50002279B-page 3



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RN4020
TABLE 1-1: PIN DESCRIPTION
Pin Name
Description
Function
1 GND
Ground
Ground
2 AIO2
Bi-directional with programmable analog I/O
1.35V and 30 mA max out
3 AIO1
Bi-directional with programmable analog I/O
1.35V and 30 mA max out
4 AIO0
Bi-directional with programmable analog I/O
1.35V and 30 mA max out
5 UART TX
UART Transmit (TX)
Output
6 UART RX
UART Receive (RX)
Input
7 WAKE_SW
Deep Sleep Wake; active-high to wake module from
Deep Sleep. If the module runs without a host micro-
controller, connect the UART_RX pin to VDD via a
Input; weak pull down
10K resistor to conserve power in Deep Sleep.
8 CMD/MLDP
Command or MLDP mode – In Command mode,
UART traffic is sent to the command interpreter. In
MLDP mode, UART traffic is routed to the MLDP
Bluetooth LED connection, if active.
Input; Edge triggered; Change
from High to Low to enter CMD
mode from MLDP mode
9 GND
Ground
Ground
CONNECTION Default state is output. Active-high indicates the
• Connection Status Indicator
LED module is connected to a remote device. Active-low (Green LED)
10 PIO[1]
indicates a disconnected state. Configurable as
• PIO[1]
SCK
PIO[1] via software command. SCK for Diagnostics • SCK
PWM1
and Factory Calibration if pin 17 is asserted.
• PWM1
MLDP_EV
11
PIO[2]
CS
PWM2
Default function is output used for MLDP data event
indicator (Red LED). Active-high indicates MLDP
data received or UART console data pending. Low
level indicates no events. Event is only triggered in
MLDP mode, when CMD/MLDP (pin 8) is high.
Configurable as PIO[2] via “|I” and “|O” commands.
CS for Diagnostics and Factory Calibration if pin 17
is asserted.
• MLDP Data Indicator (Red
LED)
• PIO[2]
• CS
• PWM2
WS
12
PIO[3]
MOSI
PWM3
Default function is an output used for Activity
Indicator (Blue LED). High level indicates module is
awake and active. Low level indicates module is in a
Sleep state. Accessible as PIO[3] via “|>” and “|<”
commands. MOSI for Diagnostics and Factory
Calibration if pin 17 is asserted.
• WS (Blue LED)
• PIO[3]
• MOSI
• PWM3
13
PIO[4]
MISO
MISO for Diagnostics and Factory Calibration if pin • PIO[4]
17 asserted.
• MISO
14
CTS
PIO[5]
Reserved for CTS if hardware flow control is enabled • CTS (input)
on the UART; active-low.
• PIO[5]
DS50002279B-page 4
2015 Microchip Technology Inc.




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