Locale Icon
English
  • Forums

    Popular Forums

    • LTspice
    • RF and Microwave
    • Video
    • Power Management
    • Precision ADCs
    • FPGA Reference Designs
    • Linux Software Drivers

    Product Forums

    • Amplifiers
    • Microcontrollers
    • Clock and Timing
    • Data Converters
    • Direct Digital Synthesis (DDS)
    • Energy Monitoring and Metering
    • Interface and Isolation
    • MEMS Inertial Sensors
    • Power Management
    • Processors and DSP
    • Switches/Multiplexers
    • Temperature Sensors
    • Voltage References
    View All

    Application Forums

    • A2B
    • Audio
    • Automated Test Equipment (ATE)
    • Condition-Based Monitoring
    • Depth, Perception & Ranging Technologies
    • Embedded Vision Sensing Library
    • Motor Control Hardware Platforms
    • Precision Technology Signal Chains Library
    • Video
    • Wireless Sensor Networks Reference Library

    Design Center Forums

    • ACE Evaluation Software
    • ADEF System Platforms
    • Design Tools and Calculators
    • FPGA Reference Designs
    • Linux Software Drivers
    • Microcontroller no-OS Drivers
    • Reference Designs
    • Signal Chain Power (SCP)
    • Software Interface Tools
    • System Demonstration Platform (SDP) Support
  • Learn

    Highlighted Webinar

    Upcoming Webinar: Simplify High-Accuracy Instrumentation Design with Latest Precision Data Converters

    Join us for an insightful webinar on how ADI’s Precision technology is transforming the landscape of high accuracy instrument design with cutting-edge...

    Places

    • ADI Education Home
    • ADI Webinars
    • GMSL U
    • StudentZone (Analog Dialogue)
    • Video Annex
    • Virtual Classroom

    Libraries

    • 3D ToF Depth Sensing Library
    • Continuous-Wave CMOS Time of Flight (TOF) Library
    • Embedded Vision Sensing Library
    • Gigabit Multimedia Serial Link (GMSL) Library
    • Optical Sensing Library
    • Precision Technology Signal Chains Library
    • Software Modules and SDKs Library
    • Supervisory Circuits Library
    • Wireless Sensor Networks Library

    Latest Webinars

    • Simplifying Connectivity - Remote Controlled (RC) Nodes in a Software Defined Vehicle (SDV)
    • Upcoming Webinar: Simplify High-Accuracy Instrumentation Design with Latest Precision Data Converters
    • Design High Performance Power Systems with Ultralow Noise Technology
    • µModule Solution for Intelligent Motion Control
    • Accelerating Embedded System Development with CodeFusion Studio™︎
    View All Webinars
  • Community Hub

    Challenge Yourself!

      KCC's Quizzes AQQ286 about Right Labels on the Right Boxes containing colored balls

      1. Quote of the week: "Knowledge is knowing a tomato is a fruit. Wisdom is not putting it in a fruit salad" - unknown Sources: commons.wikimedia...

    View All

    What's Brewing

      Quiz! Why a Hybrid Approach Works Blog and Test Your Knowledge

      Quiz! Understand ISO 26262 Compliance Test your knowledge with our quick quiz , based on the blog " Safety in Layers: Why a Hybrid Approach Works ...

    View All

    Places

    • Community Help
    • Logic Lounge
    • Super User Program

    Resources

    • EZ Code of Conduct
    • EZ How To Help Articles
    • Getting Started Guide
    • ADI: Words Matter
    • Community Help Videos
    View All
  • Blogs

    Highlighted Blogs

    Exploring DCM and CCM in SMPS: Part 1 of 6

    Power supplies are the unsung heroes of electronic devices, ensuring that they receive the precise, stable, and clean DC voltages they need to function...

     

    Let’s Take a Field-Bus Trip

    Let’s dive deep into what makes field buses unique compared to each other. Building on our previous blog post, What Makes Field Bus Communication Unique...

    Latest Blogs

    • Countable vs Non-countable Faults
    • Power Your Signal: DAS Networks Unleashed: Part 2 of 4
    • Combining Functional Safety and Availability Using Redundancy
    • Top 3 Engineering Blogs That Captivated Minds on EngineerZone
    • How to Generate a Custom Profile for Optimal System Performance
    Read All Blogs

    ADI Blogs

    • EZ Spotlight
    • The Engineering Mind
  • ContentZone

    Visit ContentZone

    ContentZone

    Technical articles. Blogs. Videos. Your ADI content, all in one place.

    View ContentZone

    Featured Content

    Featured Content Title

    Blurb About Content

    View Content By Industry

    • Aerospace and Defense Systems
    • Automotive Solutions
    • Consumer Technology Solutions
    • Data Center Solutions
    • Energy Solutions
    • Healthcare Solutions
    • Industrial Automation Technology Solutions
    • Instrumentation and Measurement Solutions
    • Intelligent Building Solutions
    • Internet of Things (IoT)
    • Wireless Communication Solutions

    View Content By Technology

    • A2B Audio Bus
    • ADI OtoSense Predictive Maintenance Solutions
    • Dynamic Speaker Management
    • Gallium Nitride (GaN) Technology
    • Gigabit Multimedia Serial Link (GMSL)
    • Industrial Vision
    • Power Solutions
    • Precision Technology
    • RF
    • Security Solutions
    • Sensor Interfaces
    • SmartMesh
  • Partners

    Partner Forums

    • Boston Engineering
    • PalmSens
    • Richardson RFPD
    • Tri-Star Design, Inc.

    Partner Libraries

    • Calian, Advanced Technologies Library
    • Clockworks Signal Processing Library
    • Colorado Engineering Inc. (DBA CAES AT&E) Library
    • Epiq Solutions Library
    • Fidus Library
    • VadaTech Library
    • Vanteon Library
    • X-Microwave Library
EngineerZone
EngineerZone
ADSP-BF70x
  • Log In
  • User
  • Site
  • Search
OR
Ask a Question
ADSP-BF70x
  • Processors and DSP
  • Blackfin Processors
  • ADSP-BF70x
  • Cancel
ADSP-BF70x
Documents the secret BF70x documentation
  • Q&A
  • FAQs/Docs
  • Members
  • Tags
  • More
  • Cancel
  • +Documents
  • ADSP BF706 Ezkit Mini SPI1 cannot be done in master mode.
  • +ADSP-BF707: FAQ
  • -ADSP-BF70X: FAQ
    • Different Wake-up Sources on BF70x
    • ADSP-BF70x application cannot boot using Secure Boot
    • CPLB enhancements in Blackfin+ Core
    • FAQ: Different Wake-up Sources on BF70x
    • Digital watch code for RTC
    • Enhancements in Hardware Loop in Blackfin+ core
    • Enhancements in Supervisor Mode in Blackfin+ core
    • HADC maximum bandwidth
    • Highlights of MSI on BF70x
    • How can I initialize DDR memory device connected to BF70x processor ?
    • How do I access the full memory space of the SPI slave?
    • How L2CTL in BF70x is different than BF60x ?
    • How the System Cross Bar (SCB) in BF70x different than in BF60x ?
    • How to configure MSI IDMAC for Dual Buffer Descriptor Ring mode operation
    • FAQ: How to re-enable the Core clock on BF70x after gating it
    • How to send data using SPI READY signal
    • How to take the core out of reset on BF70x
    • How to use the Signtool Utility to encrypt and sign the unsigned bootstream (loader file generated for an application, example:bootstream.ldr)
    • Is INIT Code supported in Secure Boot in ADSP-BF707
    • Monitoring Cache Performance on the ADSP-BF70x
    • Performance Enhancements in Blackfin+ core
    • UART slave boot BF70x with Higher BAUD rate
    • Sample code for HADC on BF70x?
    • What are the salient features of SPI Host Port on BF70x?
    • What is the effect of bus disabling (RDEN bit) on RTC functionality?
    • What is the Encrypt-Hash and Hash-Decrypt mode in PKTE module
    • What is the purpose of the ownership bit when programming the PKTE module for encryption/hashing?
    • What modes of Encryption and Hashing are supported and how do they make an application secure
    • Getting Started with ADSP-BF70x Processors
    • How to re-enable the Core clock on BF70x after gating it
    • Known Errata Against ADSP-BF70x Blackfin+ Datasheet
    • the secret BF70x documentation
    • Where can I find power consumption data for BF70x processors?
    • What are the major differences between DMC module of BF60x and BF70x ?
    • Cache Enhancements in Blackfin+ core
    • Can I pass the output generated from PKA directly to the PKTE module for encryption/decryption
    • Configuring Timer in continuous/single pulse mode
    • DMA error interrupt
    • How to verify that the boot bytes are accurate in all boot modes for the ADSP-BF60x and ADSP-BF70x?
  • BF707 SPI Slave to Master loopback communication
  • Example for UART transmit and receive operation using Core Mode for BF707
  • Hardware Reset using Watchdog in BF706

the secret BF70x documentation

For anyone trying to evaluate the BF70x for design-in, there are definite gaps in the documentations.

I don't claim to have all the answers, but I'm posting what I've managed to infer in the hopes that it saves someone else some anguish.


RE: the secret BF70x documentation by pinaz:

Lesson 1:

Figure 36-8 in the Hardware Reference Manual (Revision 0.2, May 2014) is inaccurate/incomplete. Refer to the "BITM_ROM_BCMD_" #define values in "defBF70x_rom.h" in the CrossCore IDE.


RE: the secret BF70x documentation by pinaz:

Lesson 2:

An essential piece of information not found in any Analog document is the following table that should accompany a corrected version of Figure 36-8:

NOAUTO BCODE DUMMY ADDR SPEED
0 ignored ignored ignored ignored
1 used used used used

In other words, when NOAUTO is not set, the BCODE, DUMMY, ADDR, and SPEED values are ignored.


RE: the secret BF70x documentation by pinaz:

Lesson 3:

Table 36-14 in the Hardware Reference Manual and the preceding text implies that selection of "SPIMCODE" (called "BCODE" in "defBF70x_rom.h") controls the Command, Dummy Bytes, and SPI Clock.  However, this is not true.

SPIMCODE / BCODE appears to only control which command byte is used.


RE: the secret BF70x documentation by pinaz:

Lesson 4:

Table 36-14 in the Hardware Reference Manual doesn't enumerate what the algorithms and/or assumptions are in booting.

For example, both SPIMCODE / BCODE modes 0xA " QOR FAST_MODE (Atmel) " and 0xC " QOR FAST_MODE " appear to boot the Winbond W25Q32 populated on the ADZS-BF707-EZBRD.

However, mode 0xC is at a considerable performance disadvantage to mode 0xA.

For an unexplained reason, mode 0xC wastes 11-12 milliseconds continuously polling with a RDSR (Read Status Register 05h) command, which costs that much in extra boot time.

Mode 0xA also issues a RDSR, but only does so for four SPI cycles.  It doesn't seem the polling is waiting for a change of value; it just issues that number of transactions.


RE: the secret BF70x documentation by pinaz:

Here is some collected data on the SPI clock speed in different boot modes using BF707 0.0 silicon on a ADZS-BF707-EZBRD development board.  As you will see, some boot modes appear to be broken.

BootCMD BCODE SPEED measured SPI clock MHz
F0210242 1 F 6.25
80210242 1 8 11.11
F0220242 2 F 6.25
80220242 2 8 11.11
F0230242 3 F 6.25
80230242 3 8 11.11
F0640242 4 F 6.25
80640242 4 8 11.11
F0680242 8 F 6.25
80680242 8 8 11.11
F0690242 9 F 6.25
80690242 9 8 11.11
F06A0242 A F 3.125
806A0242 A 8 3.125
F06C0242 C F 3.125
806C0242 C 8 3.125

The "quad" SPI modes of BCODEs A and C ought to offer extra speed.  However, if the clock rate is stuck, it could erode the advantage and cost boot time.

  • Share
  • History
  • More
  • Cancel
analog-devices logo

About Analog Devices

  • Who We Are
  • Careers
  • Newsroom
  • What We Do (Signals+)
  • Investor RelationsExternalLink
  • Quality & Reliability
  • Sales and Distribution
  • What's New on Analog.com
  • Contact Us

Find Help

  • Support
  • Resources
  • WikiExternalLink
  • Analog Dialogue

Get the Latest News

Stay up to date with our latest news and articles about Analog Devices' products, design tools, trainings, and events.

Sign Up Now
  • Instagram page
  • Twitter page
  • Linkedin page
  • Youtube page
  • Facebook
  • Legal and Risk
  • Accessibility
  • Privacy Policy
  • Privacy Settings
  • Cookie Settings
沪ICP备09046653号-1

©2025 Analog Devices, Inc. All Rights Reserved

analog-devices

About Analog Devices

Down Up
  • Who We Are
  • Careers
  • Newsroom
  • What We Do (Signals+)
  • Investor RelationsExternalLink
  • Quality & Reliability
  • Sales and Distribution
  • What's New on Analog.com
  • Contact Us

Find Help

Down Up
  • Support
  • Resources
  • WikiExternalLink
  • Analog Dialogue

Get the Latest News

Stay up to date with our latest news and articles about Analog Devices' products, design tools, trainings, and events.

Instagram page Facebook Twitter page Linkedin page Youtube page
  • Legal and Risk
  • Accessibility
  • Privacy Policy
  • Privacy Settings
  • Cookie Settings
沪ICP备09046653号-1

©2025 Analog Devices, Inc. All Rights Reserved