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Original question:

CC2500: CC2500 (and similar) AGC Control

Compiler/CC2500: About AGCCTRL0 Register of CC2500

TsungSheng Huang
Prodigy 40 points
Part Number: CC2500


Tool/software: TI C/C++ Compiler

I want to understand AGCCTRL0 register of CC2500.

The AGCCTRL0 register include following:

1. HYST_LEVEL 

2. WAIT_TIME

3. AGC_FREEZE

4. FILTER_LENGTH

Except AGC_FREEZE register is following Link:

e2e.ti.com/.../605997

My question:

1. What is the result of each register setting for the receiver?

2. Is the setting value of the AGC register different depending on the environment?

Thanks,

TsungSheng.

  • 0
    TI__Guru**** 317180 points
    See www.ti.com/.../swra114d.pdf which cover this in some detail.
  • 0 in reply to TER
    Prodigy 40 points
    Thanks, TER.
    I have already read this document.
    Regarding HYST_LEVEL, there seems to be no information in this document.

    and,
    About the difference in the environment whether affect the register settings, I still understand.

    Thanks for your help.
  • 0 in reply to TsungSheng Huang
    TI__Guru**** 317180 points
    As the app note indicate it could be that you would need to increase some of the register settings if you have a very noise environment. But I would recommend you to start with the values given in SmartRF Studio for the setting with the RX BW closest to what you need.

    What is the background for the question?
  • 0 in reply to TER
    Prodigy 40 points
    Hi, TER.

    OK, I see.
    And, I want to know the the detail of HYST_LEVEL.
    Can you tell me that change the setting of HYST_LEVEL can cause what effect?

    The background for the question:
    I want to know how to set the registers of AGCCTRL2、AGCCTRL1 and AGCCTRL0?
    What is difference of results between these register settings are different?
    Environment or RF specification or......cause the setting difference of AGCCTRL2 / AGCCTRL1 / AGCCTRL0?

    And, if a product need to use in many environment, include openly place (ex:park), many obstacle place ( ex:hypermarket).
    How to setting there registers?


    Thanks for your help.
  • 0 in reply to TsungSheng Huang
    TI__Guru**** 317180 points
    We have not seen any issues with the AGC settings. I would recommend you to start with the settings in SmartRF Studio and report back if you see an issue with this settings.

    A park is normally not a noisy RF environment. You can experience more issues if you are a place with a lot of WiFi or Bluetooth traffic.
  • 0 in reply to TER
    Prodigy 40 points
    Hi, TER.

    OK, I see.
    Thanks for your help.