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S110_SoftDevice_Specification_2.0(S110_SoftDevice_Specification_2.0).pdf
1 Introduction
1.1 Documentation
2 Product overview
2.1 SoftDevice
2.2 Multiprotocol support
3 Bluetooth low energy protocol stack
3.1 Profile and service support
3.2 Bluetooth low energy features
4 SoC library
5 SoftDevice Manager
6 SoftDevice information structure
7 Flash memory API
8 Radio Notification
9 Concurrent Multiprotocol Timeslot API
9.1 Request types
9.2 Request priorities
9.3 Timeslot length
9.4 Scheduling
9.5 Performance considerations
9.6 Multiprotocol timeslot API
9.6.1 API calls
9.6.2 Timeslot events
9.6.3 Timeslot signals
9.6.4 Signal handler return actions
9.6.5 Ending a timeslot in time
9.6.6 The signal handler runs at LowerStack priority
9.7 Timeslot usage examples
9.7.1 Complete session example
9.7.2 Blocked timeslot example
9.7.3 Canceled timeslot example
9.7.4 Timeslot extension example
10 Master Boot Record and Bootloader
10.1 Master Boot Record
10.2 Bootloader
10.3 Master Boot Record (MBR) and SoftDevice reset behavior
10.4 Master Boot Record (MBR) and SoftDevice initialization
11 SoC resource requirements
11.1 Attribute Table size
11.2 Memory resource map and usage
11.3 Hardware blocks and interrupt vectors
11.4 Application signals - software interrupts
11.5 Programmable Peripheral Interconnect (PPI)
11.6 SVC number ranges
11.7 External requirements
12 Processor availability and interrupt latency
12.1 Interrupt latency due to SoC framework
12.2 Processor availability
12.3 BLE peripheral performance
12.3.1 Advertising interrupt latency
12.3.2 BLE peripheral connection
12.3.3 API calls
12.3.4 CPU utilization in connection
12.4 Performance with Flash memory API and Concurrent Multiprotocol Timeslot API
13 BLE data throughput
14 BLE power profiles
14.1 Connection event
14.2 Advertising event
15 SoftDevice identification and revision scheme
15.1 MBR distribution and revision scheme
15.2 Notification of SoftDevice revision updates
Appendix A SoftDevice architecture
SoC library
SoftDevice Manager
Protocol stack
Application Program Interface (API)
Memory isolation and run-time protection
Call stack
Heap
Peripheral run-time protection
Exception (interrupt) management with a SoftDevice
Interrupt forwarding to the application
Events - SoftDevice to application
SoftDevice enable and disable
Power management
Error handling
S110 nRF51
Bluetooth® low energy Peripheral SoftDevice
SoftDevice Specification v2.0
Key Features
Applications
• Bluetooth® 4.1 compliant low energy single-mode protocol
• Computer peripherals and I/O devices
stack
• Link layer
• L2CAP, ATT, and SM protocols
• GATT, GAP, and L2CAP
• Concurrent Peripheral and Broadcaster roles
• GATT Client and Server
• Full SMP support including MITM and OOB pairing
• Mouse
• Keyboard
• Multi-touch trackpad
•
Interactive entertainment devices
• Remote control
• 3D glasses
• Gaming controller
• Complementary nRF51 SDK including Bluetooth profiles and
• Personal Area Networks
• Health and fitness sensor and monitor
devices
• Medical devices
• Key fobs and wrist watches
• Remote control toys
• Home automation
example applications
• Master Boot Record for over-the-air device firmware update
• Memory isolation between application and protocol stack for
robustness and security
• Thread-safe supervisor-call based API
• Asynchronous, event-driven behavior
• No RTOS dependency
• Any RTOS can be used
• No link-time dependencies
• Standard ARM® Cortex™-M0 project configuration for
application development
• Support for multiprotocol operation concurrent with
Bluetooth low energy connections and non-concurrently
• Concurrent multiprotocol timeslot API
• Alternate protocol stack running in application space
Reproduction in whole or in part is prohibited without the prior written permission of the copyright holder.
Copyright © 2014 Nordic Semiconductor ASA. All rights reserved.
S110 nRF51 SoftDevice Specification v2.0
Liability disclaimer
Nordic Semiconductor ASA reserves the right to make changes without further notice to the product to
improve reliability, function or design. Nordic Semiconductor ASA does not assume any liability arising out
of the application or use of any product or circuits described herein.
Life support applications
Nordic Semiconductor’s products are not designed for use in life support appliances, devices, or systems
where malfunction of these products can reasonably be expected to result in personal injury. Nordic
Semiconductor ASA customers using or selling these products for use in such applications do so at their
own risk and agree to fully indemnify Nordic Semiconductor ASA for any damages resulting from such
improper use or sale.
Contact details
For your nearest distributor, please visit http://www.nordicsemi.com.
Information regarding product updates, downloads, and technical support can be accessed through your
My Page account on our homepage.
Main office:
Otto Nielsens veg 12
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Phone: +47 72 89 89 00
Fax: +47 72 89 89 89
Mailing address:
Nordic Semiconductor
P.O. Box 2336
7004 Trondheim
Norway
Page 2
S110 nRF51 SoftDevice Specification v2.0
Document Status
Status
Description
v0.5
v0.7
v1.0
This specification contains target specifications for product development.
This specification contains preliminary data; supplementary data may be published from Nordic
Semiconductor ASA later.
This specification contains final product specifications. Nordic Semiconductor ASA reserves the right
to make changes at any time without notice in order to improve design and supply the best possible
product.
Revision History
Date
Version
Description
February 2015
2.0
Updated for S110 SoftDevice v8.0.0.
Added:
• Chapter 6 “SoftDevice information structure” on page 14
• Section 11.1 “Attribute Table size” on page 33
•
Appendix A "SoftDevice architecture" on page 50
Updated:
• Section 3.1 “Profile and service support” on page 8
• Section 3.2 “Bluetooth low energy features” on page 9
• Chapter 8 “Radio Notification” on page 16
• Section 10.2 “Bootloader” on page 30
• Section 10.3 “Master Boot Record (MBR) and SoftDevice reset
behavior” on page 31
• Section 10.4 “Master Boot Record (MBR) and SoftDevice
initialization” on page 32
• Section 11.2 “Memory resource map and usage” on page 34
• Section 12.3 “BLE peripheral performance” on page 41
• Chapter 13 “BLE data throughput” on page 44
• Chapter 14 “BLE power profiles” on page 45
June 2014
1.3
Updated for S110 SoftDevice v7.0.0.
Added:
• Chapter 11.7 “External requirements” on page 38
Updated:
• Key Features on front page
• Section 1.1 “Documentation” on page 5
• Section 2.2 “Multiprotocol support” on page 6
• Section 3.1 “Profile and service support” on page 8
• Section 3.2 “Bluetooth low energy features” on page 9
• Chapter 4 “SoC library” on page 12
• Chapter 5 “SoftDevice Manager” on page 13
• Chapter 7 “Flash memory API” on page 15
• Section 9.6 “Multiprotocol timeslot API” on page 22
• Section 9.1 “Master Boot Record (MBR)” on page 30
• Section 11.2 “Memory resource map and usage” on page 34
Page 3
S110 nRF51 SoftDevice Specification v2.0
Date
April 2014
Version
Description
1.3A
Updated for S110 SoftDevice v7.0.0. alpha
Added:
• Chapter 9 “Concurrent Multiprotocol Timeslot API” on page 20
• Section 9.1 “Master Boot Record (MBR)” on page 30
November 2013
1.2
March 2013
1.1
February 2013
1.0
Updated:
• Key Features on front page
• Section 2.2 “Multiprotocol support” on page 6
• Table 3 “GAP features in the BLE stack” on page 9
• Table 9 “Proprietary features in the BLE stack” on page 11
• Table 26 “Additional latency due to SoftDevice and MBR
processing” on page 39
• 12.4 “Performance with Flash memory API and Concurrent
Multiprotocol Timeslot API” on page 43
Updated for S110 v6.0.0 release.
Added Chapter 7 “Flash memory API” on page 15;
Added Chapter 10 “Master Boot Record and Bootloader” on page 30
Updated Table 1 on page 8;
Updated Table 4 on page 10;
Updated Table 10 on page 12;
Updated Chapter 8 “Radio Notification” on page 16;
Updated Table 17 on page 19.
Updated for changes made as of S110 v5.0.0;
Changed Section 9.2 “Processor availability” on page 37 and Section
14 “BLE power profiles” on page 45;
Changed Table 27 on page 37;
Added Table 28 on page 38;
Changed Table 30 on page 40;
Changed Figure 16 on page 46 and Figure 17 on page 47.
Changed Memory resource requirements in Table 16 on page 19;
Added Section 9.3 “Application signals - software interrupts” on
page 21;
Updated Chapter 9 “BLE performance” on page 36 and added Section
9.3 “Data throughput” on page 40;
Updated diagrams in Chapter 14 “BLE power profiles” on page 45;
Added Chapter 15 “SoftDevice identification and revision scheme” on
page 48;
Updated Chapter 15.2 “Notification of SoftDevice revision updates” on
page 49.
September 2012
0.6
First release.
Page 4
S110 nRF51 SoftDevice Specification v2.0
Introduction
1
The S110 SoftDevice is a Bluetooth® low energy (BLE) Peripheral protocol stack solution. It integrates a low
energy controller and host, and provides a full and flexible Application Programming Interface (API) for
building Bluetooth low energy System on Chip (SoC) solutions.
This document contains information about the SoftDevice features and performance.
Note: The SoftDevice features and performance are subject to change between revisions of this
document. See Section 15.2 “Notification of SoftDevice revision updates” on page 49 for more
information. This specification outlines the supported features of a production level
SoftDevice. Alpha and beta versions of the SoftDevice may not support all features. To find
information on any limitations or omissions, see the SoftDevice release notes, which will
contain a detailed summary of the release status.
Documentation
1.1
Below is a list of the core documentation for the SoftDevice.
Document
Description
Appendix A: SoftDevice
Architecture
nRF51822 Product
Specification (PS)
nRF51822 Product
Anomaly Notification (PAN)
nRF51 Series Compatibility
Matrix
Bluetooth Core
Specification
Essential reading for understanding the resource usage and performance related chapters of
this document.
Contains a description of the hardware, modules, and electrical specifications specific to the
nRF51822 chip.
Contains information on anomalies related to the nRF51822 chip.
Compatibility and relations between nRF51 IC revisions, SoftDevices and SoftDevice
Specifications, SDKs, development kits, documentation, and QDIDs.
The Bluetooth Core Specification version 4.1, Volumes 1, 3, 4, and 6 describes Bluetooth
terminology which is used throughout the SoftDevice Specification.
Page 5
S110 nRF51 SoftDevice Specification v2.0
Product overview
2
This section provides an overview of the SoftDevice.
SoftDevice
2.1
The SoftDevice is a precompiled and linked binary software implementing a Bluetooth 4.1 low energy
protocol stack for the nRF51 series of chips. See the nRF51 Series Compatibility Matrix for SoftDevice/chip
compatibility information.
The Application Programming Interface (API) is a set of standard C language functions and data types that
give the application complete compiler and linker independence from the SoftDevice implementation.
The SoftDevice enables the application programmer to develop their code as a standard ARM® Cortex™-M0
project without needing to integrate with proprietary chip-vendor software frameworks. This means that
any ARM® Cortex™-M0 compatible toolchain can be used to develop Bluetooth low energy applications with
the SoftDevice.
Application – Profiles and Services
nRF API
| Protocol API
(SV Calls)
nRF SoftDevice
Protocol Stack
App-Specific
peripheral
drivers
SoC Library
SoftDevice
Manager
CMSIS
nRF51 HW
Figure 1 System on Chip application with the SoftDevice
The SoftDevice can be programmed onto compatible nRF51 Series chips during both development and
production.
Multiprotocol support
2.2
The SoftDevice supports both non-concurrent and fully concurrent multiprotocol implementations. For
non-concurrent operation, a proprietary 2.4 GHz protocol can be implemented in the application program
area and can access all hardware resources when the SoftDevice is disabled. For concurrent multiprotocol
operation, with a proprietary protocol running concurrently with the SoftDevice protocol(s), see Chapter 9
“Concurrent Multiprotocol Timeslot API” on page 20.
Page 6
S110 nRF51 SoftDevice Specification v2.0
Bluetooth low energy protocol stack
3
The Bluetooth 4.1 compliant low energy Host and Controller embedded in the SoftDevice are fully qualified
with multi-role support (Peripheral and Broadcaster). The API is defined above the Generic Attribute
Protocol (GATT), Generic Access Profile (GAP), and Logical Link Control and Adaptation Protocol (L2CAP).
The SoftDevice allows applications to implement standard Bluetooth low energy profiles as well as
proprietary use case implementations.
The nRF51 Software Development Kit (SDK) complements the BLE protocol stack with Service and Profile
implementations. Single-mode System on Chip (SoC) applications are enabled by the full BLE protocol stack
and nRF51 series integrated circuit (IC).
Application
Profiles and Services
nRF51 SoC
SoftDevice
Host
Generic Attribute
Profile (GATT)
Generic Access Profile
(GAP)
Attribute
Protocol (ATT)
Security Manager
(SM)
Logical Link Control and Adaptation Layer
Protocol (L2CAP)
Link Layer (LL)
Physical Layer (PHY)
Controller
Figure 2 SoftDevice stack architecture
Page 7
S110 nRF51 SoftDevice Specification v2.0
Profile and service support
3.1
Table 1 lists the profiles and services adopted by the Bluetooth Special Interest Group at the time of
publication of this document. The SoftDevice supports all of these as well as additional proprietary profiles.
Adopted Profile
Adopted Services
HID over GATT
Heart Rate
Proximity
Blood Pressure
Health Thermometer
Glucose
Phone Alert Status
Alert Notification
Time
Find Me
Cycling Speed and Cadence
Running Speed and Cadence
Location and Navigation
Cycling Power
Scan Parameters
Weight Scale
HID
Battery
Device Information
Heart Rate
Device Information
Link Loss
Immediate Alert
TX Power
Blood Pressure
Device Information
Health Thermometer
Device Information
Glucose
Device Information
Phone Alert Status
Alert Notification
Current Time
Next DST Change
Reference Time Update
Immediate Alert
Cycling Speed and Cadence
Device information
Running Speed and Cadence
Device Information
Location and Navigation
Cycling Power
Scan Parameters
Weight Scale
Body Composition
User Data
Device Information
Continuous Glucose Monitoring Continuous Glucose Monitoring
Environmental Sensing
Bond Management
Device Information
Environmental Sensing
Table 1 Supported profiles and services
Note: Examples for selected profiles and services are available in the nRF51 SDK. See the SDK
documentation for details.
Page 8
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