Current Measure

This document is intended to introduce the current power consumption measurement scenario for RTK RTL87x3 solution. The following topics are included to help users establish the power consumption environment.

The settings of hardware environment.
The configuration in MCUConfig Tool and DSPConfig Tool.
The settings of application.

EVB Hardware Environment

This section describes the hardware environment for testing.

../../../../_images/evb_environment.png — EVB Environment

The above figure shows RTK’s tested situation, which is without LED, MIC and Speaker.
RTK provides general results, the Bluetooth chip is connected to iPhone series.
The power supply is set to 3.7V.
The power supply used by RTK is KA3003P.
The current meter used by RTK is DMM6500.
The current meter is configured as follows:
- The current range is 100mA.
- The sample rate is 60000 samples/s.
- The sample time is 30s.
The iPhone used by RTK is iPhone 6 Plus, the system version is 12.4.8.

Note

DUT: The equipment for testing power consumption.
SUT: The end device for testing power consumption.

EVB Setup for RTL87x3D in DSP1 Only Mode

The jumpers of EVB for the RTL87x3D when testing in DSP1 only mode.

The jumpers of EVB
Name	Condition
DEV_1	Floating
VDEV2	Floating
KEY	Floating
LED	Floating
VIO1	Floating
VIO2	VEXT
VIO3	Floating
VIO4	Floating
VIO5	Floating
VIO_FLASH	VEXT
TXD	M3_0
RXD	M3_1
FT_VIO	Floating

Note

VIO1 needs to be connected to VEXT and FT_VIO needs to be connected to VIO1 when burning image.

EVB Setup for RTL87x3D when DSP1 and DSP2 Both Enabled

The difference with DSP1 only.

Connect jumper according to the external buck enable pin, for example, if using P5_1, connect VIO3; if using P6_1, connect VIO4.
Remove R15 to remove unused flash on EVB.
VDDIO1=VEXT.

EVB Setup for RTL87x3E

The jumpers of EVB for the RTL87x3E when testing power consumption.

The jumpers of EVB
Name	Condition
V_DEV1	Floating
V_DEV2	Floating
KEY	Floating
LED	Floating
R62	Remove
TX	M3_0
RX	M3_1
FT_VIO	Floating

Configuration

The configuration in MCUConfig Tool and DSPConfig Tool.

Peripherals

The settings of peripherals.

../../../../_images/Peripherals_2.jpg — Part Two Peripheral Configuration

Turn off power-independent peripherals.

Turn off LED.
Turn off key, only use MFB.
Turn off sensor.
Etc.

Log

The settings of log.

../../../../_images/Log_1.jpg — Part One Log Configuration

../../../../_images/Log_2.jpg — Part Two Log Configuration

../../../../_images/Log_3.jpg — Part Three Log Configuration

Turn off MCU log.
Turn off DSP log.
Turn off DSP2 log for RTL87x3D.

Audio

The settings of audio.

../../../../_images/Audio_2.jpg — Part Two Audio Configuration

The power data provided by RTK is based on AMIC.
Settings for RTL87x3D.
- Speaker uses Class D.
- AMIC1 and AMIC2 are low power mode.
- AMIC3 and AMIC4 are normal mode.
- Speaker uses differential.

Power Off

The settings for power off.

../../../../_images/power_off_2.jpg — Part Two Power off Configuration

Disable Power off when pairing timeout.

Unnecessary Function

The settings for some unnecessary functions.

../../../../_images/unnecessary_function_2.jpg — Part Two Unnecessary Function Configuration

../../../../_images/unnecessary_function_3.jpg — Part Three Unnecessary Function Configuration

../../../../_images/unnecessary_function_4.jpg — Part Four Unnecessary Function Configuration

Turn off unnecessary functions.

Disable Enable RTK App advertising.
Disable Enable RTK fast pair advertising.
Disable Multi-link support.
Disable Battery detection support.
Disable Charger.
Disable Charger box detect method.
Etc.

AAC/SBC

The settings of AAC/SBC.

If testing AAC.
- Enable AAC.
If testing SBC.
- Disable AAC.

ANC On Setup

The settings of ANC.

../../../../_images/anc_on_3.jpg — ANC on

Configure ANC MIC and Speaker.
- MIC for RTL87x3D.
  - ANC FF = AMIC3.
  - ANC FB = AMIC4.

LE Audio

The settings of LE audio.

../../../../_images/le_audio_3.jpg — Part Two LE Audio Configuration

../../../../_images/le_audio_4.jpg — Part Three LE Audio Configuration

../../../../_images/le_audio_5.jpg — Part Four LE Audio Configuration

Turn on BIS and CIS.
Turn off Legacy.
Configure LE link number.
Configure the sample rate of conversation to 16K.

DSP1 Only for RTL87x3D

The settings of RTL87x3D for DSP1 only.

../../../../_images/dsp1_for_rtl87x3d.jpg — DSP1 for RTL87x3D

Disable Buck support.
Configure in app_flags.h.
- Set F_APP_POWER_TEST to 1.
- Set F_APP_HIF4_SUPPORT to 0.
DSP.
- The DSP image used by RTK is turning off NN/NR.

DSP1+DSP2 for RTL87x3D

The settings of RTL87x3D for DSP1 with DSP2.

Open Buck support.

Fixed Transmit Power

The settings of fixed transmit power.

../../../../_images/fixed_tx_power.jpg — Fixed Transmit Power

For power consumption data stability, the RTK’s tested situation fixed the transmit power of BR/EDR/LE at 6dbm. To disable transmit power control and fix the transmit power, please follow the shown steps.

Enable Export RF TX power to System Config Bin.
Enable Export Frequency Offset to System Config Bin.
Set BR/EDR Level Number of Power Control to 1. LE transmit power setting is also controlled by this setting.
Set the transmit power of BR/EDR/LE to the target value.

Note

This configuration is only for the power consumption test. The transmit power control needs to be enabled when BQB certification.

DSP Configure

The settings of DSP.

../../../../_images/dsp_config_1.jpg — Part One DSP Config Configuration

../../../../_images/dsp_config_2.jpg — Part Two DSP Config Configuration

Select Bypass Nearend Process.
Select Bypass Farend Process.
Disable APT.

Application

The settings of the application.

Disable RSSI and Lower Battery Role Swap

Set F_APP_POWER_TEST in app_flags.h to 1.