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Cypress AN214934 Manual

Bluetooth low energy current consumption measurements
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Spec No:
Spec Title:
Replaced by: NONE
THIS SPEC IS OBSOLETE
002-14934
AN214934 - BLUETOOTH LOW ENERGY
CURRENT CONSUMPTION MEASUREMENTS

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Summary of Contents for Cypress AN214934

  • Page 1 THIS SPEC IS OBSOLETE Spec No: 002-14934 Spec Title: AN214934 - BLUETOOTH LOW ENERGY CURRENT CONSUMPTION MEASUREMENTS Replaced by: NONE...

  • Page 2: Table Of Contents

    Cypress is converting the acquired IoT part numbers from Broadcom to the Cypress part numbering scheme. Due to this conversion, there is no change in form, fit, or function as a result of offering the device with Cypress part number marking. The table provides Cypress ordering part number that matches an existing IoT part number.

  • Page 3: Acronyms And Abbreviations

    Note: Cypress provides customer access to technical documentation and software through its Cypress Developer Community and Downloads & Support site (see Overview). For Cypress documents, replace the “xx” in the document number with the largest number available in the reposi- tory to ensure that you have the most current version of the document.

  • Page 4: Test Setup

    BlueTool is a proprietary Cypress software tool for exercising, testing, scripting, debugging, and programming devices that use Cypress Bluetooth chips. BlueTool runs on a standard PC running the Microsoft® Windows® operating system. BlueTool interfaces with the Cypress Bluetooth chips at the HCI protocol layer.

  • Page 5: Test Equipment Settings

    Agilent N6705A with N6761A precision power module is used. Settings for the N6761A are: Range: 0.1A ■ Current limit: 0.1A ■ Sampling rate: 0.04 ms ■ Mode: Data logger mode is used to capture current consumption ■ Figure 1. Board Configuration for the BLE Current Consumption www.cypress.com Document No. 002-14934 Rev. *C...

  • Page 6: Daughterboard Settings

    Bluetooth Low Energy Current Consumption Measurements Daughterboard Settings The McLaren daughterboard has to be configured prior to taking the measurements. Remove L10 and R30 on the topside of the board, refer to Figure ■ Figure 2. CYW4330 McLaren Daughterboard www.cypress.com Document No. 002-14934 Rev. *C...
  • Page 7 Bluetooth Low Energy Current Consumption Measurements Remove R23 on the bottomside of the board, refer to Figure ■ Figure 3. R23 on the Bottomside of the CYW4330 McLaren Daughterboard www.cypress.com Document No. 002-14934 Rev. *C...

  • Page 8: Bcm9Umb Bluetooth/Wlan Motherboard Settings

    Equivalent equipment can be used for measuring current consumption. Note that VBAT is the supply for the daughterboard. Refer to the BCM9UMB Hardware User Manual for a full descrip- tion of the motherboard. Figure 4. BCM9UMB Jumpers 3.3V Remove Jumpers www.cypress.com Document No. 002-14934 Rev. *C...
  • Page 9 Pole 1 Pole 2 High Float (no connect) BT_GPIO_1 Pole 3 Pole 4 High Float (no connect) BT_GPIO_2 Pole 5 Pole 6 High Float (no connect) BT_GPIO_3 Pole 7 Pole 8 High Float (no connect) www.cypress.com Document No. 002-14934 Rev. *C...
  • Page 10 Bluetooth Low Energy Current Consumption Measurements Figure 6. Switch Location of SW4 www.cypress.com Document No. 002-14934 Rev. *C...

  • Page 11: Loading The Configuration File

    This section provides steps for loading the configuration file. Follow these steps to load the configuration file after the CYW4330 McLaren daughterboard is powered up: 1. Launch the Cypress BlueTool software. 2. Enter CNTL+0 to open the log window.
  • Page 12 Bluetooth Low Energy Current Consumption Measurements 5. Click Reset and the log window should display ‘success’. 6. Select the 0: Vendor-specific Commands (0 key) from the list. www.cypress.com Document No. 002-14934 Rev. *C...
  • Page 13 Bluetooth Low Energy Current Consumption Measurements 7. Select the Download Minidriver from the list and enter CNTL+9. www.cypress.com Document No. 002-14934 Rev. *C...

  • Page 14: Current Consumption Measurements

    This application note provides current consumption measurements in two of the most common modes: advertising and scan mode. Note: Contact your local Cypress technical representative for BlueTool support and to download the configuration file (refer to 5.5. Loading the Configuration File) needed for the following sections.
  • Page 15 BT_WAKE_Active_Mode is set to Active Low, and click OK. 5. In the HCI Control window, select 7.8: LE Controller Commands (8 key) from the list. 6. Select LE_Set_Advertising_Data from the menu. Set the Advertising_Data parameter with any 4 bytes. www.cypress.com Document No. 002-14934 Rev. *C...
  • Page 16 Bluetooth Low Energy Current Consumption Measurements 7. Select LE_Set_Advertising_Parameters from the menu. 8. Set the LE_Set_Advertising_Parameters by selecting both the Advertising_Interval_Min and Advertising_In- terval_Max to 4096, click OK. www.cypress.com Document No. 002-14934 Rev. *C...
  • Page 17 162 μA with 4 bytes of data. It is measured over 2.56 seconds (advertising interval). The actual current consumption is approximately 142 A. The front-end module (U2) needs to be μ removed. There is 20 A of leakage, which is difficult to remove μ www.cypress.com Document No. 002-14934 Rev. *C...
  • Page 18 11. Switch the BT_WAKE to low by toggling position 1 and 2 of the SW4 (refer to Figure on page 8 Table 3 BT_WAKE control). 12. Select LE_Set_Advertise_Enable from the menu. In the Advertising_Enable window, select Advertising is disabled, and click OK. www.cypress.com Document No. 002-14934 Rev. *C...

  • Page 19: Scan Mode

    The devices in scan mode look for advertisers to setup a connection. This is an example of a non-connected mode. 1. Launch the Cypress BlueTool software. 2. From the Transport menu, select HCI Control or enter CNTL+1. 3. In the HCI Control window, select 0: Vendor-specific Commands (0 key) from the list.
  • Page 20 7. Select LE_Set_Scan_Parameters from the menu. Set the scan parameters as below, and click OK: LE_Scan_type: Passive Scanning LE_Scan_Interval: 2048 LE_Scan_Window: 18 8. Select LE_Set_Scan_Enable from the menu. In the LE_Scan_Enable window, select Scanning is enabled, and click OK. www.cypress.com Document No. 002-14934 Rev. *C...
  • Page 21 341 μA. It is measured over 1.28 seconds (scan interval). Again, there is 20 A of current leakage in the front-end module (U2). The corrected current con- μ sumption should be approximately 321 μ www.cypress.com Document No. 002-14934 Rev. *C...
  • Page 22 10. Switch the BT_WAKE to low by toggling position 1 and 2 of the SW4 (refer to Figure 6 Table 3 BT_WAKE control). 11. Select LE_Set_Scan_Enable from the menu. In the LE_Scan_Enable window, select Scanning is disabled, and click OK. www.cypress.com Document No. 002-14934 Rev. *C...

  • Page 23: Document History Page

    Bluetooth Low Energy Current Consumption Measurements Document History Page Document Title: AN214934 - Bluetooth Low Energy Current Consumption Measurements Document Number: 002-14934 Orig. of Submission Rev. ECN No. Description of Change Change Date – – 05/12/2011 4330-AN400-R Initial release. 5480516...

  • Page 24: Worldwide Sales And Design Support

    If the Software is not accompanied by a license agreement and you do not otherwise have a written agreement with Cypress governing the use of...

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