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FM1182-FM1182E_parameters_tuning_guide_1.6.pdf

FM1182-FM1182E_parameters_tunin…

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简介:本文档为《FM1182-FM1182E_parameters_tuning_guide_1.6pdf》,可适用于硬件技术领域,主题内容包含FMFMEParameterTuningGuideRevisionForteMediaConfidentialRevisonhistoryRevst符等。

FM1182/FM1182E Parameter Tuning Guide Revision 1.6 ForteMedia Confidential 1 Revison history Rev 1.0 09/29/05 1 st release Rev 1.1 09/30/05 1) add lec_powref_th (0x 1E1D) 2) add pwrdwn_set (0x1E51) Rev 1.2 10/27/05 1) add lec_pf_min_gain (0x 1F08) 2) remove uart_baud_rate (0x1E31) 3) add uart_baud_rate (0x3FD8) 4) remove aec_reset_count (0x1E60) 5) fix typo Rev 1.3 06/14/06 1) fix UART baudrate typo (0x 3FD9) 2) add parameters associated with Line_out Equalizer Rev 1.4 07/10/06 1) add usb_switch for FM1182E Rev 1.5 03/20/06 1) clarify FM1182 and FM1182E default difference 2) add pwdn_device_off (x1E70) 3) correct description of yout_des_con0_low (x1EDF) Rev 1.6 02/14/08 1) add fq_period Note: Some of the parameter may be added later on, the existing parameter address will remain unchanged. FM1182/FM1182E Parameter Tuning Guide Revision 1.6 ForteMedia Confidential 2 FM1182/FM1182E Parameter Tuning Guide Parameters associate with device enable/format 1. 0x1E30 (dv_enable) 2. 0x1E32 (mic_revert_mode) 3. 0x1E38 (digi_control) 4. 0x1E3A (dv_flag) 5. 0x1E3B (mic_hpf_type) 6. 0x1E41 (num_of_mics) 7. 0x1E52 (dsp_mips) 8. 0x1E6A (gpi_check_max) 9. 0x1E70 (pwdn_device_off) 10. 0x1E71 (USB_pwdn_flag) 11. 0x3FD9 (uart_barud_rate) Parameters associate with HW gain 1. 0x1E34 (mic_pgagain) -- initialization stage only 2. 0x1E35 (linein_pgagain) -- initialization stage only 3. 0x1E36 (lineout_pgagain) -- initialization stage only 4. 0x1E37 (spkear_pgagain) -- initialization stage only 5. 0x1E75 (ear_spk_pgagain) -- initialization stage only 6. 0x1E6C (int_PA_gain) -- for FM1182E only 7. 0x1E6D (ear_PA_gain) -- for FM1182E only 8. 0x3FC0 (HW_mic_pgagain) -- run time only 9. 0x3FC1 (HW_linein_pgagain) -- run time only 10. 0x3FC6 (HW_speaker_pgagain) -- run time only Parameters associated with SW process on/off 1. 0x1E42 (mu_rx_exc) 2. 0x1E43 (mu_tx_exc) 3. 0x1E44 (kl_config) 4. 0x1E45 (sp_flag) 5. 0x1E46 (ft_flag) 6. 0x1E4F (fft_ifft) 7. 0x1E51 (pwrdwn_set) 8. 0x1E61 (mic_test_flag) Parameters associated with SW gain, and has no effect on algorithm 1. 0x1E3D (mic_volume) 2. 0x1E3E (spk_volume) 3. 0x1E3F (spk_mute) 4. 0x1E40 (mic_mute) 5. 0x1E50 (spk_volume_cap) 6. 0x1E59 (lout_clip_th) 7. 0x1E62 usb_mic_vol_cap 8. 0x1E6E (volume up/down step control) 9. 0x1E9B (micgain0) Parameters associated with mic-in auto calibration enable: bit 2 of 0x1E46 1. 0x1E9C (micgain1) 2. 0x1EF3 (vad12_diff_ceil) 3. 0x1EF4 (vad12_diff_max) FM1182/FM1182E Parameter Tuning Guide Revision 1.6 ForteMedia Confidential 3 Parameters associated with mic-in AGC enable: bit 15 of 0x1E45 1 0x1EA3 (micagc_ref_low) 2 0x1EA4 (micagc_ref_high) 3 0x1E9F (micagc_minagc) 4 0x1EA0 (micagc_maxagc) Parameters associated with line-in AGC enable: bit 11 of 0x1E45 1. 0x1EA8 (lineinagc_ref) 2. 0x1EA9 (lineinagc_minagc) 3. 0x1EAA (lineinagc_maxagc) Parameter associated with noise paste back enable: bit 0 of 0x1E46 1. 0x1E9A (noisegain) Parameter associated with Dynamic Range Control enable: bit6 (Lout) & bit 8 (spkout) of 0x1E44 1. 0x1E00 (spkout_drc_slant) 2. 0x1E01 (spkout_drc_level) 3. 0x1E07 (lout_drc_slant) 4. 0x1E08 (lout_drc_level) 5. 0x1E0F (spk_db_drop) 6. 0x1E10 (spk_db_decay) Parameters associated with Line_out Equalizer 1. 0x1EC9 (linout_equal0) 2. 0x1ECA (linout_equal1) 3. 0x1ECB (linout_equal2) 4. 0x1ECC (linout_equal3) 5. 0x1ECD (linout_equal4) Parameters associate with acoustic echo cancellation 1. 0x1E4D (AEC ref gain) 2. 0x1E86 (pf_z_factor_exp_high) 3. 0x1E87 (pf_z_factor_exp_low) 4. 0x1E88 (fe_th_yout) 5. 0x1E8C (fe_vad_th_big) 6. 0x1E90 (AEC_nw_shift) 7. 0x1E91 (AEC_fe_vad_shift) 8. 0x1E63 (AEC_delay_length) 9. 0x1EC5 (fevad_gain_limit) 10. 0x1EC6 (fq_fevad_gain_low) 11. 0x1EC7 (fq_fevad_gain_high) Parameters associate with big echo cancellation enable: bit 14 of 0x1E45 1. 0x1ED8 (inv_const1) 2. 0x1EDA (clipth1) 3. 0x1EDB (clipth2) FM1182/FM1182E Parameter Tuning Guide Revision 1.6 ForteMedia Confidential 4 4. 0x1EDE (yout_des_con0_high) 5. 0x1EDF (yout_des_con0_low) Parameters associate with half duplex control 1. 0x1E57 (mic_sat_th) 2. 0x1E5A (yout_sat_th) 3. 0x1E5C (st_hd_time) Parameters associate with noise suppression 1. 0x1E47 (mic_nss_level) 2. 0x1E48 (mic_ns_lowband_gain) 3. 0x1E49 (mic_ns_highband_gain) 4. 0x1EBC (fq_period) 5. 0x1EBD (fq_beta_v) -- 2-mic only 6. 0x1EBE (fq_beta_uv) -- 2-mic only Parameters associated with side tone cancellation 1. 0x1E1D (lec_refpow_th) 2. 0x1E4E (LEC ref_gain) 3. 0x1E64 (LEC_delay_length) 4. 0x1E94 (LEC_pf_z_factor_exp) 5. 0x1E95 (LEC_post_mu) 6. 0x1E96 (LEC_mu_shift) 7. 0x1F08 (LEC_pf_min_gain) Parameter associated with VAD (2-mic only) 1. 0x1E8B (pf_coef_gain) 2. 0x1ED4 (VAD0_ceil_low) 3. 0x1ED5 (VAD0_ceil_high) 4. 0x1ED6 (vad0_rat_thrd_fe) 5. 0x1ED7 (vad0_rat_thrd_nofe) 6. 0x1EED (vad3_rat_thrd) 7. 0x1EEE (vad3_mult) 8. 0x1EFC (vad1 _rat_thrd) 9. 0x1EFE (vad1_add_thrd) 10. 0x1F06 (VAD2_rat_thrd) 11. 0x1F07 (VAD2_add_thrd) Parameter for FM1182E only 1. 0x1E77 (usb_switch) Read only parameter for status 2. 0x1E65 (frame_counter) 3. 0x1E5E (watchdog_count) 4. 0x1E5F (mic_sat_count) 5. 0x1E80 (vad_led_flag) 6. 0x3FCE (strap_option_status) 7. 0xB82 ( ref mic calibration gain) 8. 0xB41 (line-in_AGC_gain) 9. 0x1BC3 (mic-in_AGC_gain) FM1182/FM1182E Parameter Tuning Guide Revision 1.6 ForteMedia Confidential 5 FM1182/FM1182E Parameter Tuning Guide Revision 1.6 ForteMedia Confidential 6 There are four categories of parameters, the 1 st category can only be changed at initialization, the 2 nd category can be changed at run time only with precaution, the 3 rd category has to be preset according to the application and physical placement of micropone and speaker, the 4 th category is read only status. When the system is powered up or reset, the SW will initialize the proper register according to the strap options, then wait in a loop for further instruction if it‟s in external host mode (i.e., EEPROM, Serial Host Interface or UART mode). Once SW get the “GO” instruction (i.e., 0x1E3A = 0x0000), the initialization is considered done. The system will be in “run” mode. Parameters can only be changed at initialization stage 1. Dv_enable Address: 0x1E30 (default value 0x033B) 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 - - - - - - 1 1 - - 1 1 1 - 1 1 D15:D10 - Reserved. D9 - Parser enable, 1: enable, 0: disable. D8 - Serial port (CHI bus) enable, 1: enable, 0: disable. D7:D6 - Reserved. D5 - Analog line-out enable, 1: enable, 0: disable. D4 - Analog line-in enable, 1: enable, 0: disable. D3 - Speaker out enable, 1: enable, 0: disable. D2 - Reserved. D1 - Mic_1 enable, 1: enable, 0: disable. D0 - Mic_0 enable, 1: enable, 0:disable. 2. Mic_revert_mode Address: 0x1E32 (default value 0x0) 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 1 1 D15:D0 - 1: enable, 0: disable. When mic_revert_mode is enabled, mic1 will be used for mic – lineout path instead of mic0. 3. Mic_pgagain Address: 0x1E34 (default value 0x24/0x25 for FM1182 and 0x8B/0x9D for FM1182E) 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 - - - - - - - - 0 0 1 0 0 1 0 0 D15:D8 - Reserved. D7:D4 – Mic_1_gain, PGA gain of mic1. D3:D0 – Mic_0_gain, PGA gain of mic0. Microphone/line-in Gain Table Microphone in gain setting Gain value 0x0 -2 dB 0x1 -1 dB 0x2 0 dB 0x3 +2 dB 0x4 +4 dB 0x5 +6 dB FM1182/FM1182E Parameter Tuning Guide Revision 1.6 ForteMedia Confidential 7 0x6 +8 dB 0x7 +10 dB 0x8 +12 dB 0x9 +14 dB 0xA +16 dB 0xB +18 dB 0xC +20 dB 0xD +22 dB 0xE +24 dB 0xF +26 dB 4. Linein_pgagain Address: 0x1E35 (default value 0x0002) 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 - - - - - - - - - - - - 0 0 1 0 D15:D4 – Reserved. D3:D0 – Line-in PGA gain. 5. Lineout_pgagain Address: 0x1E36 (default value 0x001D) 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 - - - - - - - - - - - 1 1 1 0 1 D15:D5 – Reserved. D4:D0 – Line-out PGA gain. Speaker/Line out Gain Table Speaker/line out gain setting Gain value 0x0000 -29 dB 0x0001 -28 dB 0x0002 -27 dB 0x0003 -26 dB 0x0004 -25 dB 0x0005 -24 dB 0x0006 -23 dB 0x0007 -22 dB 0x0008 -21 dB 0x0009 -20 dB 0x000A -19 dB 0x000B -18 dB 0x000C -17 dB 0x000D -16 dB 0x000E -15 dB 0x000F -14 dB 0x0010 -13 dB 0x0011 -12 dB 0x0012 -11 dB 0x0013 -10 dB 0x0014 -9 dB FM1182/FM1182E Parameter Tuning Guide Revision 1.6 ForteMedia Confidential 8 0x0015 -8 dB 0x0016 -7 dB 0x0017 -6 dB 0x0018 -5 dB 0x0019 -4 dB 0x001A -3 dB 0x001B -2 dB 0x001C -1 dB 0x001D 0 dB 0x001E 1 dB 0x001F 2 dB 6. Speaker_pgagain Address: 0x1E37 (default value 0x001D) 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 - - - - - - - - - - - 1 1 1 0 1 D15:D5 – Reserved. D4:D0 – Speaker PGA gain. 7. Digi_control Address: 0x1E38 (default value 0x000F) 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 - 0 - - - - - 0 - - - 0 1 1 1 1 D15 – Reserved. D14 - CHI_CLOCK_INTERNAL (Serial port, CHI bus, serial clock source), 1: internal, 0: external. D13:D9 - Reserved. D8 - CHI_SYN_INTERNAL, Serial port (CHI bus) frame sync source, 1: internal, 0: external. D7:D5 - Reserved. D4 - CHI_ONE_CLOCK_DELAY (Delay of Data) , 1: MSB valid one clock delay after frame sync, 0: MSB valid same cycle as frame sync. D3:D0 – CHI_WORD_LENGTH (Serial word length of serial port ), 15: 16-bit, 7: 8-bit. Other value: not valid. Word length of 16-bit is supported in linear PCM mode, 8-bit is supported in u-law mode. 8. DV_flag Address: 0x1E3A (default value 0x0000) 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 0 - - - - - - - - - - - - - - - D15 - Ready flag, 1: ready, 0: not ready. The device can be configured only when ready flag is set. The flags will be automatic cleared after the request is processed. 9. Pwrdwn_set Address: 0x1E51 (default value 0xD000) 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 1 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 D15 - resume_flag, FM1182/FM1182E Parameter Tuning Guide Revision 1.6 ForteMedia Confidential 9 0xD000: need to reload parameter after wakeup from power down, 0xC000: no need to reload parameter after wakeup from power down. 10. DSP_Mips Address: 0x1E52 (default value 0x0016) 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 - - - - - - - - - - - 1 0 1 1 0 D15 - D5 - Reserved. D4 - D0 - value. This parameter sets the DSP Mips. DSP_mips = 1.024 * (value + 17). The default setting is 1.024 * (22 + 17) = 39 Mips. The table below is the MIPs requirement for some typical application. Both spkout DRC & line-out DRC are included in the 1-mic & 2-mic application. Application MIPs 1-mic 23 2-mic O+O 32 2-mic U+O 35 spkout DRC 1 Line-out DRC 1 11. GPI_check_max Address: 0x1E6A (default value 0x0004) 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 D15 - D0 - value. This parameter sets the build-in function enable/disable. See table below Value Build-in function enabled 0 none 1 Volume up 2 Volume up, volume down 3 Volume up, volume down, mute_in 4 Volume up, volume down, mute_in, earphone_in 12. Ear_spk_pgagain Address: 0x1E75 (default value 0x0011) 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 - - - - - - - - - - - 1 0 0 0 1 D15-D3 - Reserved. D2-D0 - Spk_pga gain value under earpiece mode. This parameter defines the spk_pgagain in earpiece mode. Pin23 set to high will set FM1182/FM1182E to earpiece mode if not in SHI mode. 13. usb_switch Address: 0x1E77 (default value 0x0000) FM1182/FM1182E Parameter Tuning Guide Revision 1.6 ForteMedia Confidential 10 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 - - - - - - - - - - - - - - - 0 D15-D2 - Reserved. D0 - 1: enable USB/Bluetooth concurrent volume control. 0: disabled When USB/Bluetooth concurrent volume control is turned on, spk_volume and mic_volume will be controlled through USB and both volumes in Bluetooth mode will be saved. The volumes will be resumed when the system goes back to Bluetooth mode. FM1182/FM1182E Parameter Tuning Guide Revision 1.6 ForteMedia Confidential 11 Parameters can be changed at run time only with precaution 1. HW_mic_pgagain Address: 0x3FC0 (default value 0x0024) 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 - - - - - - - - 0 0 1 0 0 1 0 0 D15:D8 - Reserved. D7:D4 – Mic_1 gain. D3:D0 – Mic_0 gain. At initialization stage, SW will transfer the value of mic_pgagain (0x1E34) to HW_mic_pgagain. It is not recommaned to change the HW_mic_pgagain abruptly, which may cause system unstable. Microphone in Gain Table Microphone in gain setting Gain value 0x0 -2 dB 0x1 -1 dB 0x2 0 dB 0x3 +2 dB 0x4 +4 dB 0x5 +6 dB 0x6 +8 dB 0x7 +10 dB 0x8 +12 dB 0x9 +14 dB 0xA +16 dB 0xB +18 dB 0xC +20 dB 0xD +22 dB 0xE +24 dB 0xF +26 dB 2. HW_linein_pgagain Address: 0x3FC1 (default value 0x2) 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 - - - - - - - - - - - - - - 1 0 D15:D4 – Reserved D3:D0 – Line-in PGA gain. At initialization stage, SW will transfer the value of linein_pgagain (0x1E35) to HW_linein_pgagain. It is not recommended to change the HW_linein_pgagain abruptly, which may cause system unstable. 3. HW_speaker_pgagain Address: 0x3FC6 (default value 0x03BD) 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 - - - - - - 1 1 1 0 1 1 1 1 0 1 D15:D3 – Reserved. D9:D5 – Line-out PGA gain. FM1182/FM1182E Parameter Tuning Guide Revision 1.6 ForteMedia Confidential 12 D4:D0 – Speaker PGA gain. At initialization stage, SW will transfer the value of speaker_pgagain (0x1E37) to bit 9-5 of HW_speaker_pgagain, and line-out_pgagain(0x1E36) to bit 4-0 of HW speaker_pgagain. It is not recommended to change the HW_speaker_pgagain abruptly, which may cause system unstable. The PGA gain of build-in power amplifier can only be changed on the fly. Speaker/Line out Gain Table Speaker/line out gain setting Gain value 0x0000 -29 dB 0x0001 -28 dB 0x0002 -27 dB 0x0003 -26 dB 0x0004 -25 dB 0x0005 -24 dB 0x0006 -23 dB 0x0007 -22 dB 0x0008 -21 dB 0x0009 -20 dB 0x000A -19 dB 0x000B -18 dB 0x000C -17 dB 0x000D -16 dB 0x000E -15 dB 0x000F -14 dB 0x0010 -13 dB 0x0011 -12 dB 0x0012 -11 dB 0x0013 -10 dB 0x0014 -9 dB 0x0015 -8 dB 0x0016 -7 dB 0x0017 -6 dB 0x0018 -5 dB 0x0019 -4 dB 0x001A -3 dB 0x001B -2 dB 0x001C -1 dB 0x001D 0 dB 0x001E 1 dB 0x001F 2 dB 4. UART_baud_rate Address: 0x3FD9 (default value 0x0078) 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 - - - - 0 0 0 0 0 1 1 1 1 0 0 0 D15:D12 - Reserved. D11:D0 –clock factor, baud rate = clock frequency/ (clock factor * 16). The clock frequency is internal clock after PLL. For example, if the clock frequency is 18.432MHz, the default baud rate is 18.432/(0x0078 * 16) = 9600. FM1182/FM1182E Parameter Tuning Guide Revision 1.6 ForteMedia Confidential 13 External crystal is 4.096MHz Baud rate value 300 0x0F00 600 0x0780 1200 0x03C0 2400 0x01E0 4800 0x00F0 9600 0x0078 19200 0x003C 38400 0x001E 76800 0x000F 115200 0x000A External crystal is 13MHz Baud rate value 300 0x0C80 600 0x0640 1200 0x0320 2400 0x0190 4800 0x00C8 9600 0x0064 19200 0x0032 38400 0x0019 FM1182/FM1182E Parameter Tuning Guide Revision 1.6 ForteMedia Confidential 14 Parameters need to be preset according to application, placement and component 1. SPKOUT_DRC_slant Address: 0x1E00 (default value 0x2900) 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 0 0 1 0 1 0 0 1 0 0 0 0 0 0 0 0 D15:D0 - value. This parameter is to specify attenuation amount caused by DRC when the amplitude of speaker out is larger than the value spkout_DRC_level specified. Larger the value means more suppression at peaks. The slop is 1/(1+ y) when the speaker out amplitude is larger than spkout_DRC_level specified, but less than 2 times of spkout_DRC_level specified. The slop is 1/(1+2y) when the speaker out amplitude is larger than 2 times of spkout_DRC_level specified. Where y is spkout_DRC_slant/0x7FFF, y = 0.32 with default value of lout_DRC_slant = 0x2900 2. spkout_DRC_level Address: 0x1E01 (default value 0x3000) 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 D15:D0 - value. This parameter defines the lowest level where speaker out DRC (dynamic range control) suppresses speaker out. If the signal level is smaller than spkout_DRC_level, then no suppression will be done. 0x7FFF is mapped to 1200mV. The default value 0x3000 means any signal larger than 450mV (measured single end) will be suppressed, and the slew rate is determined by spkout_DRC_slant. 3. Lout_DRC_slant Address: 0x1E07 (default value 0x5300) 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 0 0 1 1 0 0 0 1 0 0 0 0 0 0 0 0 D15:D0 - value. This parameter is to specify attenuation amount caused by DRC when the amplitude of lineout is larger than the value lout_DRC_level specified. Larger the value means more suppression at peaks. The slop is 1/(1+ y) when the lineout amplitude is larger than lout_DRC_level specified, but less than 2 times of lout_DRC_level specified. The slop is 1/(1+2y) when the lineout amplitude is larger than 2 times of lout_DRC_level specified. Where y is lout_DRC_slant/0x7FFF, y = 0.648 with default value of lout_DRC_slant = 0x5300 4. Lout_DRC_level Address: 0x1E08 (default value 0x1800) 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 0 1 0 1 0 0 1 1 0 0 0 0 0 0 0 0 D15:D0 - value. This parameter defines the lowest level where line-out DRC (dynamic range control) suppresses line- out. If the signal level is smaller than lout_DRC_level, then no suppression will be done. 0x7FFF is FM1182/FM1182E Parameter Tuning Guide Revision 1.6 ForteMedia Confidential 15 mapped to 1200mV. The default value 0x1800 means any signal larger than 225mV (measured single end) will be suppressed, and the slew rate is determined by lout_DRC_slant. 5. Spk_dB_drop Address: 0x1E0F (default value 0x392D) 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 0 0 1 1 1 0 0 1 0 0 1 0 1 1 0 1 D15:D0 - value This parameter defines the maximum speaker volume attenuation at double talk. The default value 0x392D = 7dB 6. Spk_dB_decay Address: 0x1E10 (default value 0x30) 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 D15:D0 - value. This parameter defines the restoration speed at double talk when VAD3 is off. The default value 0x30 means the restoration speed from attenuation 0x392D (7 dB) to 0x6BB3 (-1.5 dB) is 4.31 seconds. Restoration time = [(0x6BB3 – Spk_dB_drop) /Spk_dB_decay] * 128/(8k) s. 7. LEC_refpow_th Address: 0x1E1D (default value 0x2000 for FM1182 and 0x0200 for FM1182E) 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 D15:D0 - value. This parameter defines the LEC adapt threshold. The LEC will adapt when the power of estimation is bigger than the threshold. Set the value to 0x200 is more suitable than default value. 8. mic_HPF_type Address: 0x1E3B (default value 0x0001) 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 - - - - - - - - - - -

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