Digital Sound Processors for FPD TVs 32bit Audio DSP BU9414FV No.12083EAT04 ●General Description This LSI is the digital sound processor which made the use digital signal processing for FPD TVs. DSP of ROHM original is used for the TV sound processor unit, and it excels in cost performance. There are two digital input systems. An output is a digital output corresponding to 2.1ch. ●Features ■ Digital Signal Processor unit Word length: The fastest machine cycle: Multiplier: Adder: Data RAM: Coefficient RAM: Sampling frequency: Master clock : 32bit (Data RAM) 40.7ns (512fs, fs = 48kHz) 32 x 24 → 56bit 32 + 32 → 32bit 256 x 32bit 128 x 24bit fs = 48kHz 512fs (It is a slave to 256fs of fs = 48kHz, 44.1 kHz, and 32 kHz) ■ Digital signal input (Stereo 2 lines): 16/20/24bit(I2S, Left-Justified, Right-Justified) Digital signal output (Stereo 2 lines): 16/20/24bit(I2S, Left-Justified, Right-Justified, S/PDIF) ■The sound signal processing function for FPD TVs 2 Pre-Scaler, DC cut HPF, Channel Mixer, P Volume(Perfect Pure Volume), BASS, MIDDLE, TREBLE, Pseudo BASS, Surround, P2Bass, P2Treble, 7Band Parametric EQ, Master Volume, L/R balance, Post-Scaler, Output signal clipper (P2Volume, P2Bass, and P2Treble are the sound effect functions of ROHM original.) ●Applications Flat Panel TVs (LCD, Plasma) www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 1/57 2012.03 - Rev.A Technical Note BU9414FV ●Absolute maximum rating(Ta=25°C) Item Symbol Power-supply voltage VDD Allowable dissipation Pd operating temperature range Topr Storage temperature range Tstg *1: 7mW is decreased for 1°C when using it with Ta=25°C or more. *Operation can’t be guaranteed. ●Operating condition(Ta=-25~+85°C) Item Power-supply voltage * It isn’t Radiation-proof designed for the product. www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. Symbol VDD 2/57 Rating 4.5 700 (*1) -25~+85 -55~+125 Unit V mW °C °C Rating 3.0~3.6 Unit V 2012.03 - Rev.A Technical Note BU9414FV ●Electric characteristic(Digital serial) VDD=3.3V unless specified, Ta=25°C Rating value Standard Item Symbol Hysteresis H Level voltage Input voltage L Level voltage Input current Pull-up resistor input L current VIH VIL II IIL 2.5 -1 -150 -100 0.8 +1 -50 V V µA µA VIN=0~3.3V VIN=0V Adaptive terminal *1,2,3 *1,2,3 *1 *2 Pull-down resistor input H current H Level voltage Output voltage L Level voltage IIH VOH VOL 35 2.75 - 70 - 105 0.55 µA V V VIN=3.3V IO=-0.6mA IO=0.6mA *3 *4 *4 SDA terminal Output voltage VOL - - 0.4 V IO=3mA *5 L Level voltage Min. Max. Unit Terms Adaptive terminal *1 CMOS hysteresis input terminal SCLI(8pin), SDAI(9pin), MODE(20pin) *2 Pull-up resistor built-in CMOS hysteresis input terminal LRCKI(2pin), SDATA1(3pin), SDATA2(4pin), MCLK(39pin), BCKI(40pin) *3 Pull-down resistor built-in CMOS hysteresis input terminal RESETX(5pin), MUTEX_SP(6pin), MUTEX_DAC(7pin), ADDR(21pin) *4 CMOS output terminal SPDIFO(22pin), SDAO(28pin), SCLO(29pin), MUTEX_DACO(30pin), MUTEX_SPO(31pin), RESETXO(32pin), DATAO2(33pin), DATAO1(34pin), LRCKO(35pin), BCKO(36pin), SYSCKO(37pin) *5 Open drain output terminal SDAI(9pin) ・Electric characteristic(Analogue serial) VDD=3.3V Unless specified, Ta=25°C,RL=10kΩ, VC standard Rating Value Item Symbol Min Standard whole Circuit current IQ 15 Regulator part Output voltage VREG 1.3 1.5 PLL part Lock frequency FLK8 24.576 www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 3/57 Max Unit 30 mA 1.7 V - MHz Object pin/Condition VDD IO=100mA 256fs(fs=48kHz) input 2012.03 - Rev.A Technical Note BU9414FV BCKI MCLK VSS3 SYSCLKO BCKO LRCKO SDATAO1 SDATAO2 RESETXO MUTEX_SPO MUTEX_DACO SCLO SDAO N.C. N.C. N.C. N.C. N.C. SPDIFO ADDR ●Block diagram 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 CLK DSP SP Conv. TEST PLLA 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 LRCKI SDATA1 SDATA2 RESETX MUTEX_SP MUTEX_DAC SCLI SDAI VSS1 DVDDCORE REG15 LDOPOFF ANATEST VDD N.C. N.C. PLLFIL LDO15 19 20 MODE I2C IF N.C. Control IF VSS2 I2S IF Fig.2 Block diagram www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 4/57 2012.03 - Rev.A Technical Note BU9414FV ●Pin Description(s) No. Name Description of terminals Type No. Name Description of terminals Type 2 1 N.C (*2) - 21 2 3 4 5 6 7 8 9 10 11 12 13 LRCKI SDATA1 SDATA2 RESETX MUTEX_SP MUTEX_DAC SCLI SDAI VSS1 DVDDCORE REG15 LDOPOFF D D D B B B F E G G 22 23 24 25 26 27 28 29 30 31 32 33 14 15 16 17 18 19 20 ANATEST VDD N.C N.C PLLFIL VSS2 MODE I2S Audio LR signal input I2S Audio data input 1 I2S Audio data input 2 Reset status with “L” DAC mute signal input(*1) SP mute signal input(*1) I2C Forwarding clock input I2C Data input output Digital I/O GND Connect to REG15 terminal Built-in regulator voltage output Built-in regulator POFF signal input Analog test monitor terminal Digital I/O power supply I C Slave address selection B terminal C SPDIFO S/PDIF Signal output N.C N.C N.C N.C N.C C SDAO 2 line serial data output(*1) SCLO 2 line serial clock output(*1) C C MUTEX_DACO DAC mute signal output(*1) C MUTEX_SPO SP mute signal output(*1) C RESETXO Reset signal output(*1) C SDATAO2 I2S Audio data output 2 G G A 34 35 36 37 38 39 40 SDATAO1 LRCKO BCKO SYSCLKO VSS3 MCLK BCKI Filter connection terminal for PLL Digital I/O GND Test mode selection input ADDR I2S Audio data output 1 I2S Audio LR signal output 1 I2S Audio clock output 1 System clock output(*1) Digital I/O GND Master clock input I2S Audio clock input C C C C H D N.C.:Non Connection (*1):signal terminal is used with D class amplifier IC (BD5446EFV etc.) for input I2S made by Rohm. (*2) :It connects with the lead frame of a package. Please use by OPEN or GND connection. www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 5/57 2012.03 - Rev.A Technical Note BU9414FV ● Pin Equivalent Circuit Diagrams A B C VDD VDD VDD VSS VSS VSS D E F VDD VSS VSS VSS G H VDD VSS www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. VDD VSS 6/57 2012.03 - Rev.A Technical Note BU9414FV 1.Command interface I2C bus method is used in command interface with host CPU on BU9414FV. In BU9414FV, not only writing but read-out is possible except for some registers. Besides the slave address in BU9414FV, one byte select address can be Specified, written and readout. 2 The format of I C bus slave mode is shown below. S MSB LSB Slave Address A MSB Select Address LSB MSB Data A LSB A P S: Start condition Slave Address: Putting up the bit of read mode (H") or write mode (L") after slave address (7bit) set with ADDR, the data of eight bits in total will be sent. (MSB first) A: The acknowledge bit in each byte adds into the data when acknowledge is sent and received. When data is correctly sent and received, "L" will be sent and received. There was no acknowledge for "H". Select Address: 1 byte select address is used in BU9414FV. (MSB first) Data: Data-byte, data(MSB first)sent and received P: Stop Condition MSB SDAI 6 LSB 5 SCLI Stop Start condition When SDAI ↓ ,SCLI=”H” condition When SDAI ↑, SCLI=”H” 1-1. Data writing S Slave Address A Select Address A Data A : From master to slave ADDR=0 MSB A6 A5 1 0 A4 0 A3 0 A2 0 A1 0 A0 0 LSB R/W 0 ADDR=1 MSB A6 A5 1 0 A4 0 A3 0 A2 0 A1 0 A0 1 LSB R/W 0 A Select Address 20h A S Slave Address (example) 80h www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. Data : From slave to master Setting of BU9414FV slave address Terminal setting Write-mode Slave-address ADDR 0 80h 1 82h A Data 00h 00h : From master to slave 7/57 P A Data A P 00h : From slave to master 2012.03 - Rev.A Technical Note BU9414FV Writing procedure Step Clock Master 1 Slave(BU9414FV) Note Start Condition 2 7 Slave Address 3 1 R/W (0) 4 1 5 8 6 1 7 8 8 1 &h80 (&h82) Acknowledge Select Address Writing object register 8 bit Acknowledge Data Writing data 8 bit Acknowledge 9 Stop Condition - The select address add +1 by auto increment function when the data is transferred continuously. Repeat of Step 7~8. 1-2. Data readout First of all, the readout target address(ex.&h20h) is written in &hD0 address register at the time of readout. In the following stream, data is read out after the slave address. Please do not return the acknowledge when ending the reception. S Slave Address (example) S A Req_Addr 80h D0h Slave Address (example) A A Data 1 81h A P 20h A **h : Master to slave, Select Address Data 2 A A : Slave to master, Ā Data N **h P **h A:With acknowledge, Ā:without acknowledge Readout Procedure Step Clock 1 Master Slave(BU9414FV) Start Condition 2 7 Slave Address 3 1 R/W (0) 4 1 5 8 6 1 7 8 8 1 9 1 Stop Condition 10 1 Start Condition 11 7 Slave Address 12 1 R/W (1) &h80 (&h82) Acknowledge Address for I2C readout &hD0 Req_Addr Acknowledge Select Address Readout object register 8 bit Acknowledge &h81 (&h82) 13 1 Acknowledge 14 8 Data 15 1 16 Note Readout data 8 bit Acknowledge Stop Condition ○ The select address adds +1 by auto increment function when continuous data is transferred. Repeat Step14~15. www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 8/57 2012.03 - Rev.A Technical Note BU9414FV 1-3. Control signal specification ○ Bus line, I/O stage electrical specification and timing. SDAI t BUF tF tLOW tHD;STA tR SCLI t HD;STA P tHIGH t HD;DAT tSU;DAT tSU;STA S tSU;STO Sr P Fig.1-1: Timing chart Table 1-1: SDAI and SCLI bus-line characteristic (Unless specified, Ta=25°C, Vcc=3.3V) Parameter 1 2 3 4 5 Code between Max. 0 400 kHz BUF 1.3 - μS HD;STA 0.6 - μS LOW 1.3 - μS HIGH 0.6 - μS SU;STA 0.6 - μS HD;DAT 1) - μS - ns fSCL "Stop" condition and "Start" t condition "Start" condition of hold-time (resending). After this period, Unit Min. SCLI clock frequency Bus-free-time High-speed mode t the first clock-pulse is generated. LOW status hold-time of SCLI clock t HIGH status hold-time of SCLI clock t Setup time of resending “Start” condition t 7 Data-hold-time t 8 Data-setup time t 9 Rising time of SDAI and SCL signal t R 20+Cb 300 ns 10 Fall time of SDAI and SCL signal t F 20+Cb 300 ns 11 Setup time of "Stop" condition SU;STO 0.6 - μS 12 Capacitive load of each bus-line Cb - 400 pF 6 t SU;DAT 0 500/250/15 0 The above-mentioned numerical values are all the values corresponding to VIH min and VIL max level. 1) To exceed an undefined area on falling edged of SCLI, transmission device should internally offer the hold-time of 300ns or more for SDAI signal(VIH min of SCLI signal). 2) Data-setup time changes with setup of MCLK. In MCLK=512fs, data setup time is 150ns. In MCLK=256fs, data setup time is 250ns. In MCLK=128fs, data setup time is 500ns. The above-mentioned characteristic is a theory value in IC design and it doesn't be guaranteed by shipment inspection. When problem occurs by any chance, we talk in good faith and correspond. Neither terminal SCLI nor terminal SDAI correspond to 5V tolerant. Please use it within absolute maximum rating 4.5V. www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 9/57 2012.03 - Rev.A Technical Note BU9414FV 2.Switching of data and clock I/O system chart of BU9414FV audio data is shown below. DSP CLK (512fs) SEL1 Digital input1 Digital input1 SDATA1 S-P conversi on1 Digital input2 Digital input2 SDATA2 S-P conversi on2 SEL2 DSP operation part This part is performanced by hardware. Main Bass Treble Func. Main P-EQ EVR Sub Main Sub P-S SDATAO1(Main) Convers ion1 D Class amp output (Main SP) P-S Convers ion2 D Class amp output (Sub Woofer) SDATAO2(Sub) P-S Convers ion3 SEL3 plla_ div SPDIFO Optical output PLLA ADDR MODE RESET I2C Audio DSP (BU9414FV) MCLK SYSCLKO (256fs) Control I/F mclk_ div ・・・ BU9414FV has 2 digital stereo input and 3 digital stereo output with the same sampling rate. Output from DSP operation part is converted into I2S mode digital output or S/PDIF mode digital serial output. System clock uses master clock input from MCLK terminal, makes 512fs multiplying clock in PLL block. Moreover, 256fs synchronous clock can be output from terminal SYSCLKO, and the clock is supplied to external DAC or D class SP amplifier. SPDIFO and output data selection of SDATAO1 and SDATAO2 should unify the DSP processing after (post) or processing before (pre) with all outputs. 2-1. S-P conversion1 input data selection(SEL1) Default = 0 Select Address Value Operating Description &h03 [ 0 ] 0 Input data from SDATA1 1 Input data from SDATA2 2-2. S-P conversion2 input data selection(SEL1) Default = 0 Select Address Value Operating Description &h03 [ 4 ] 0 Input data from SDATA1 1 Input data from SDATA2 2-3. Output data selection(SEL2) to P-S conversion1 (SDATAO1 Terminal) Default = 0 Select Address Value &h04 [ 1:0 ] 0 Main data output after DSP is processed. 1 Sub data output after DSP is processed. 2 Main data output before DSP is processed. 3 Sub data output before DSP is processed. www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. Operating Description 10/57 2012.03 - Rev.A Technical Note BU9414FV 2-4. Output data selection(SEL2) to P-S conversion2 (SDATAO2 Terminal) Default = 0 Select Address Value Operating Description &h04 [ 5:4 ] 0 Sub data output after DSP is processed. 1 Main data output after DSP is processed. 2 Sub data output before DSP is processed. 3 Main data output before DSP is processed. 2-5. SPDIFO Terminal output data selection(SEL2) Default = 0 Select Address Value &h05 [ 1:0 ] 0 Main data output after DSP is processed. Operating Description 1 Sub data output after DSP is processed. 2 Main data output before DSP is processed. 3 Sub data output before DSP is processed. 2-6. System clock selection(SEL3) Select the DSP clock supplied to S-P conversion1、S-P conversion2、DSP、P-S conversion1、P-S conversion2、S/PDIF output part. Default = 0 Select Address Value &h08 [ 5:4 ] 0 Chose the input from a MCLK terminal as a clock. 1 Chose the PLL output as a clock. 2 3 Operating Description Chose the input from a SDATA2terminal as a clock. (used for IC test). After power on or reset released, system block selection uses clock(even if not 512fs is ok) input from terminal MCLK to receive I2C command and initialize BU9414. Then set the dividing frequency ratio of PLL block (mclk_div, pll_div) that is suitable for the clock frequency from terminal MCLK , when PLL_512fs clock from PLL is steady, set &h08 = 10h. 2-7. Dividing frequency ratio setting of PLL block which corresponding to input clock from terminal MCLK Sampling rate of input clock Setting of mclk_div Setting of pll_div PLL initialization &hF3 &hF5 &hF6 512fs(24.576MHz、fs=48kHz) 10h 01h 00h 256fs(12.288MHz、fs=48kHz) 08h 01h 00h 128fs(6.144MHz、fs=48kHz) 04h 01h 00h www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 11/57 2012.03 - Rev.A Technical Note BU9414FV 3. S-P Conversion 1, S-P Conversion 2 BU9414FV has two serial-parallel conversion circuits. (S-P conversion 1, S-P conversion 2) S-P conversion 1 & 2 receives the audio data of three-wire serial input from terminal and converts it into parallel data. They select the inputs from LRCKI (2pin), BCKI (40pin), SDATA1 (3pin), and SDATA2(4pin). Input format has IIS method, left-justified method and right-justified method. Moreover, for bit clock frequency, 64fs or 48fs can be selected, and when 48fs is selected, the input format becomes the fixed right-justification. In addition, 16bit, 20bit and 24bit inputs can be selected respectively. Timing chart of each transmission method is shown in the diagram below. IIS method IIS方式 LRCKI BCKI 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 MSB 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 1 LSB S DATAI 2 3 4 5 6 7 8 9 10 11 12 13 14 15 MSB 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 LSB S 16bit 16bit 20bit 20bit 24bit 24bit Left-justified method 左詰方式 LRCKI BCKI 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 MSB DATAI 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 LSB 1 2 3 4 5 6 7 8 9 10 11 12 13 14 MSB S 15 16 LSB S 16bit 16bit 20bit 20bit 24bit 24bit Right-justified 右詰方式 method LRCKI BCKI 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 MSB 31 32 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 LSB MSB S DATAI LSB S 16bit 16bit 20bit 20bit 24bit 24bit 48fs LRCKO BCKO 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 MSB DATAO 18 19 20 21 22 23 24 1 2 3 4 5 6 7 LSB 8 9 10 11 12 13 14 15 16 17 MSB S 18 19 20 21 22 23 24 LSB S 16bit 16bit 20bit 20bit 24bit www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 24bit 12/57 2012.03 - Rev.A Technical Note BU9414FV 3-1. Three-wire serial input’s bit clock frequency setting Default = 0 Select Address S-P conversion1, S-Pconversion2 &h0B [ 4 ] 3-2. Value Operational explanation 0 64fs method 1 48fs method Three-wire serial input’s format setting Default = 0 3-3. Select Address Value S-P conversion1 &h0B [ 3:2 ] 0 IIS method Operational explanation S-P conversion2 &h0C [ 3:2 ] 1 left-justified method 2 right-justified method Three-wire serial input’s data bit width setting Default = 0 Select Address Value S-P conversion1 &h0B [ 1:0 ] 0 16 bit S-P conversion2 &h0C [ 1:0 ] 1 20 bit 2 24 bit www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. Operational explanation 13/57 2012.03 - Rev.A Technical Note BU9414FV 4. Digital sound processing(DSP) BU9414FV’s Digital Sound Processing(DSP) consists of special hardware most suitable to Thin TV. BU9414FV uses this special DSP to perform the following processing. Prescaler, DC Cut 2 HPF, Channel Mixer, P Volume(Perfect Pure Volume), BASS, MIDDLE, TREBLE, 2 2 Pseudo Stereo, Surround, P Bass, Pseudo Bass, P Treble, 7 Band・Parametric Equalizer, Master Volume, Balance, PostScaler, Output L/R Clipper. DSP Outline and Signal Flow (DATA Data width: 32 bit Machine cycle: 40.7ns Multiplier: 32×24 → 56 bit Adder: 32+32 → 32 bit Data RAM RAM) Input Coefficient operation Circuit (512fs, fs=48kHz) Data RAM: 256×32 bit Coefficient RAM: 128×24 bit MUX 0 MUX Sampling frequency: fs=48kHz Master clock: 512fs (24.576MHz, fs=48kHz) Coefficient RAM M U X Decoder circuit ADD Acc Output Digital signal from 16bit to 24bit is inputted to DSP, and it is extended by +8bit(+42dB) as overflow margin on the upper side. The clip process is performed in DSP when the process exceeding this range is performed. DC cut HPF Pre scaler Input1 Channel mixer P2Volume Surround BASS MIDDLE TREBLE Pseudo BASS P2Bass P2Treble Scaler Input2 7Band Parametric EQ EVR & Blance 2Band DRC & Clipper Main output EVR & Blance Post scaler & Clipper Sub output Digital Audio Processing Signal Flow 4-1. Prescaler When digital signal is inputted to audio DSP, if the level is full scale input and the process of surround or equalizer is performed, then it overflows, therefore the input gain is adjusted by prescaler. Adjustable range is +24dB to -103dB and can be set by the step of 0.5dB. Prescaler does not incorporate the smooth transition function. Default = 30h Select Address Operational explanation command 00 01 &h20 [ 7:0 ] … 30 31 32 0dB -0.5dB -1dB … … 14/57 … www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. gain +24dB +23.5dB FE FF -103dB -∞ 2012.03 - Rev.A Technical Note BU9414FV 4-2. DC Cut HPF The DC offset component of digital signal inputted to the audio DSP is cut by this HPF. The cutoff frequency fc of HPF is 1Hz, and first-order filter is used. Default = 0 Select Address Value Operational explanation &h21 [ 0 ] 0 Not using the DC Cut HPF 1 Using the DC Cut HPF 4-3. Channel mixer It performs the setting of mixing the sounds of left channel & right channel of digital signal inputted to the audio DSP. Here the stereo signal is made to be monaural. The data inputted to Lch of DSP is mixed. Default = 0 Select Address Value Operational explanation &h22 [ 7:6 ] 0 Inputting the Lch data 1 Inputting the data of (Lch + Rch) / 2 2 Inputting the data of (Lch + Rch) / 2 3 Inputting the Rch data The data inputted to Rch of DSP is mixed. Default = 0 Select Address Value &h22 [ 5:4 ] 0 Inputting the Rch data 1 Inputting the data of (Lch + Rch) / 2 2 Inputting the data of(Lch + Rch) / 2 3 Inputting the Lch data www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. Operational explanation 15/57 2012.03 - Rev.A Technical Note BU9414FV 4-4. P2Volume (Perfect Pure Volume) There are some scenes in which sound suddenly becomes large like plosive sound in TV Commercial or Movie. 2 P Volume function automatically controls the volume and adjusts the output level. In addition, it also adjusts in such a way that a whispery sound can be heard easily. 2 P Volume function operates in the fields of (1), (2) & (3) divided according to input level. P2V off VO (1) at the time of VIinf(-∞)~VImin 2 Noise is prevented from being lifted by P Volume function. K (2) When input level is over VImin and output is below VOmax (3) VO = VI + α α: Lifting the Whole output level by the offset value α VOmax (3) When output level VO exceeds VOmax P2V_MAX (2) VO = K・VI + α K: Slope for suppressing of D range (P2V_K) It is also possible to set an output level constant. VOmin α (1) VOinf 2 Selection of using the P Volume function. VIinf Default = 0 VImin 0dB P2V_MIN Select Address &h33 [ 7 ] Value VI Operational explanation 2 0 Not using the P Volume function 1 Using the P2Volume function Setting of VImin 2 In order to cancel that noise etc. is lifted by P Volume, the P2V_MIN sets the minimum level at which (to the minimum) the 2 P Volume functions. command Default = 00h Select Address &h34 [ 4:0 ] Operational explanation command 00 01 02 03 04 05 06 07 gain -∞ -30dB -32dB -34dB -36dB -38dB -40dB -42dB command 08 09 0A 0B 0C 0D 0E 0F gain -44dB -46dB -48dB -50dB -52dB -54dB -56dB -58dB command 10 11 12 13 14 15 16 17 gain -60dB -62dB -64dB -66dB -68dB -70dB -72dB -74dB コマンド値 18 19 1A 1B 1C 1D 1E 1F ゲイン -76dB -78dB -80dB -82dB -84dB -86dB -88dB -90dB Setting of VOmax P2V_MAX sets the output suppression level. It represents the output level VOmax at the time of input level VI = 0dB in the case of setting of P2V_K = “0h”(slope is 0). Default = 00h Select Address &h35 [ 4:0 ] www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. Operational explanation command 00 01 02 03 04 05 06 07 gain 0dB -1dB -2dB -3dB -4dB -5dB -6dB -7dB command 08 09 0A 0B 0C 0D 0E 0F 16/57 gain -8dB -9dB -10dB -11dB -12dB -13dB -14dB -15dB command 10 11 12 13 14 15 16 17 gain -16dB -17dB -18dB -19dB -20dB -21dB -22dB -23dB command 18 19 1A 1B 1C 1D 1E 1F gain -24dB -25dB -26dB -27dB -28dB -29dB -30dB - 2012.03 - Rev.A Technical Note BU9414FV Setting of K P2V_K sets the slop of D range. It sets the P2V_MAX = “1Eh”(-30dB) and represents the output level VOmax at the time of input level VI = 0dB. Default = 00h Select Address Operational explanation &h36 [ 3:0 ] command 0 1 2 3 4 5 6 7 gain -30dB -28dB -26dB -24dB -22dB -20dB -18dB -16dB comman 8 9 A B C D E F gain -14dB -12dB -10dB -8dB -6dB -4dB -2dB 0dB Setting of α P2V_OFS makes small voice easy to be heard because the whole output level is lifted. Default = 00h Select Address &h37 [ 4:0 ] Operational explanation command 00 01 02 03 04 05 06 07 gain 0dB +1dB +2dB +3dB +4dB +5dB +6dB +7dB command 08 09 0A 0B 0C 0D 0E 0F gain +8dB +9dB +10dB +11dB +12dB +13dB +14dB +15dB command 10 11 12 13 14 15 16 17 gain +16dB +17dB +18dB +19dB +20dB +21dB +22dB +23dB command 18 19 1A 1B 1C 1D 1E 1F gain +24dB - Setting 1 of transition time at the time of attack 2 A_RATE is the setting of transition time when the state of P Volume function is transited to (2)→(3). Default = 0 Select Address &h38 [ 6:4 ] Operational explanation command A_RATE time command A_RATE time 5ms 4 0 1ms 1 2ms 5 10ms 2 6 20ms 3ms 3 4ms 7 40ms Setting 1 of transition time at the time of recovery 2 R_RATE is the setting of transition time when the state of P Volume function is transited to (3)→(2). Default = 0h Select Address Operational explanation command R_RATE time command R_RATE time 0 0.25s 8 3s 1 0.5s 9 4s 0.75s 5s 2 A 3 1s B 6s 4 1.25s C 7s 5 1.5s D 8s 6 2s E 9s 7 2.5s F 10s &h38 [ 3:0 ] www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 17/57 2012.03 - Rev.A Technical Note BU9414FV Explanation of A_RATE,R_RATE(field transition of (2)<->(3)) Time T VI Input Field (2) Field (3) Field (2) VOmax Output Time T VO Attack operation A_RATE The time from exceeding the attack operation detection level VOmax till the attack operation's transition to Field ( 3 ) is completed Recovery operation R_RATE The time from falling below the recovery operation detection level VOmax till the recovery operation's transition to Field (2) is completed Setting 1 of attack detection time 2 A_TIME is the setting of the initiation of P Volume function’s transition operation. If output level at the time of transiting to 2 (2)→(3) continues for more then A_TIME time in succession, then the state transition of P Volume is started. Default = 0 Select Address &h39 [ 6:4 ] Operational explanation command 0 1 2 3 A_TIME 0.5ms 1ms 1.5ms 2ms command 4 5 6 7 A_TIME 3ms 4ms 5ms 6ms Setting 1 of recovery detection time 2 R_TIME is the setting of the initiation of P Volume function’s transition operation. If output level at the time of transiting to 2 (3)→(2) continues for more then R_TIME time in succession, then the state transition of P Volume is started. Default = 0 Select Address &h39 [ 2:0 ] www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. Operational explanation command 0 1 2 3 18/57 R_TIME 50ms 100ms 150ms 200ms command 4 5 6 7 R_TIME 300ms 400ms 500ms 600ms 2012.03 - Rev.A Technical Note BU9414FV Explanation of A_RATE_Low,R_RATE_Low(field transition of (1)<->(2)) VImin VI Input Tme T Field (1) Field (2) Field (1) VOmin Output VO Time T Recovery operation R_RATE_Low Attack operation A_RATE_Low The time from falling below the recovery operation detection level V I m i n till the recovery operation's transition to Field (2) is completed The time from exceeding the attack operation detection level V I min till the attack operation's transition to Field (1) is completed Setting 2 of the transition time at the time of attack 2 A_RATE_LOW is the setting of transition time when the state of P Volume function is transited to (2)→(1). Default = 0 Select Address Operational explanation Command 0 1 2 3 &h3A [ 6:4 ] A_RATE_LOW Time 1ms 2ms 3ms 4ms Command 4 5 6 7 A_RATE_LOW Time 5ms 10ms 20ms 40ms Setting 2 of the transition time at the time of recovery R_RATE_LOW is the setting of transition time when the state of P2Volume function is transited to (1)→(2). Default = 0 Select Address Operational explanation &h3A [ 2:0 ] Command 0 1 2 3 R_RATE_LOW Time 1ms 2ms 3ms 4ms Command 4 5 6 7 R_RATE_LOW Time 5ms 10ms 20ms 40ms Setting 2 of attack recovery detection time 2 A_TIME_LOW is the setting of the initiation of P Volume function’s transition operation. If the input level below A continues more than continuation A_TIME_LOW in the state of (2) or (3), state transition of P2Volume will be started toward the state of (1). Default = 0 Select Address &h3B [ 6:4 ] www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. Operational explanation Command 0 1 2 3 19/57 A_TIME_LOW 50ms 100ms 150ms 200ms Command 4 5 6 7 A_TIME_LOW 300ms 400ms 500ms 600ms 2012.03 - Rev.A Technical Note BU9414FV Setting 3 of attack recovery detection time 2 R_TIME_LOW is the setting of the initiation of P Volume function’s transition operation. If the input level above A continues more than continuation R_TIME_LOW in the state of (1), state transition of P2Volume will be started toward the state of (2) or (3). Default = 0 Select Address Operational explanation Command 0 1 2 3 &h3B [ 6:4 ] R_TIME_LOW 0.5ms 1ms 1.5ms 2ms Command 4 5 6 7 R_TIME_LOW 3ms 4ms 5ms 6ms ○Scene change detection and High-speed recovery function(functioning only at the time of transition of (2)<->(3)) 2 2 P Volume function makes the P Volume also compatible with large pulse sounds (clapping of hands, fireworks & shooting 2 etc.) in addition to normal P Volume operation. When large pulse sound is inputted, attack operation (A_RATE) or recovery operation (R_RATE) is performed at 4 or 64 times the speed of normal attack operation or recovery operation. Selection of using the scene change detection function. Default = 0 Select Address Value Operational explanation &h3C[ 7 ] 0 Not using of pulse sound detection function 1 Using of pulse sound detection function Selection of operating times of Recovery Time (R_RATE) in the case of using the scene change detection function. (Operating-time selection at the time of R_RATE / scene detection) serves as a recovery time. Default = 0 Select Address Value Operational explanation Command 0 1 2 3 &h3D [ 1:0 ] Value 4 8 16 64 Selection of scene change detection time Default = 0 Select Address &h3C [ 6:4 ] www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. Operational explanation Command 0 1 2 3 20/57 Time 50ms 100ms 150ms 200ms Command 4 5 6 7 Time 300ms 400ms 500ms 600ms 2012.03 - Rev.A Technical Note BU9414FV Setting of operating level of scene change detection function Operation is started by the difference between the presently detected value and the last value as a standard. Default = 0 Select Address &h3C [ 2:0 ] www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. Operational explanation Command 0 1 2 3 21/57 Detection level Over Over Over Over 1.002 0.709 0.502 0.355 Command 4 5 6 7 Detection level Over Over Over Over 0.251 0.178 0.126 0.089 2012.03 - Rev.A Technical Note BU9414FV 4-5. Surround (Matrix Surround 3D) It realizes the Surround with little feeling of fatigue even after wide seat spot and long-time watching & listening to. It reproduces the feeling of broadening of the natural sounds in medium & high bands and realizes the sound field that do no damage to the feeling of locating of the vocal. If loop is used, then the number of stages of phase shifter can be increased in a pseudo way. + Lch + L-R + + PHASE SHIFTER - Lch + Loop EFFECT GAIN LPF + Rch Rch ON/OFF of Surround function Default = 0 Select Address Value Operational explanation &h70 [ 7 ] 0 Turning the Surround effect OFF 1 Turning the Surround effect ON Setting of using the LOOP Default = 0 Select Address Value &h70 [ 5 ] 0 Not using of LOOP Operational explanation 1 Using of LOOP Setting of Surround gain Default = Fh Select Address &h70 [ 3:0 ] www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. Operational explanation Command Gain Command Gain 0 1 2 3 4 5 6 7 0dB -1dB -2dB -3dB -4dB -5dB -6dB -7dB 8 9 A B C D E F -8dB -9dB -10dB -11dB -12dB -13dB -14dB -15dB 22/57 2012.03 - Rev.A Technical Note BU9414FV 4-6. BASS BASS of TONE Control can use Peaking filter or Low-shelf filter. The setting is converted, in the IC, into digital filter’s coefficients (b0, b1, b2, a1, a2)by selecting the F0,Q and Gain, and transmitted to coefficient RAM. The switching shock noise at the time of alteration of setting can be prevented by the smooth transition function. ○BASS Control Selection of filter types Default = 0 Select Address Value &h40 [ 7 ] 0 Peaking filter Operational explanation 1 Low-shelf filter Selection of smooth transition function Default = 0 Select Address Value Operational explanation &h40 [ 6 ] 0 Using BASS smooth transition function 1 Not BASS using smooth transition function Selection of smooth transition time Default = 0 Select Address Value Operational explanation &h40 [ 5:4 ] 0 21.4ms 1 10.7ms 2 5.4ms 3 2.7ms Setting of smooth transition start In the case of using the smooth transition function, after being transmitted, by the &h40[0] command, to the coefficient RAM for smooth transition, the alteration of BASS’s coefficients is completed by using this command. Default = 0 Select Address Value Operational explanation &h4C [ 0 ] 0 BASS smooth transition stop 1 BASS smooth transition start What is necessary is the time of waiting, which is more than the time selected by the setting of Bass smooth transition time, from the time the BASS smooth transition start (&h4C[0] = “1”) is executed until the following command is sent. Please make sure to perform the Bass smooth transition stop(&h4C[0] = “0”) after the smooth transition is completed. &h4D [0] and &hF4 [0] are set to H during soft transition. (Refer to Chapter 15) www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 23/57 2012.03 - Rev.A Technical Note BU9414FV Setting of the Start of transmitting to coefficient RAM In the case of using the smooth transition, it is transmitted to the coefficient RAM for smooth transition. In the case of not using of the smooth transition, it is transmitted directly to the coefficient RAM. Default = 0 Select Address Value Operational explanation &h40 [ 0 ] 0 BASS coefficient transmission stop 1 BASS coefficient transmission start selection of frequency(F0) Default = 0Eh Select Address &h41 [ 5:0 ] Operational explanation Command Frequency Command Frequency Command Frequency Command Frequency Command Frequency Command Frequency Command Frequency Command Frequency 20Hz 50Hz 125Hz 315Hz 800Hz 2kHz 5kHz 12.5kHz 00 08 10 18 20 28 30 38 01 22Hz 09 56Hz 11 140Hz 19 350Hz 21 900Hz 29 2.2kHz 31 5.6kHz 39 14kHz 63Hz 400Hz 2.5kHz 16kHz 25Hz 160Hz 1kHz 6.3kHz 02 0A 12 1A 22 2A 32 3A 03 28Hz 0B 70Hz 13 180Hz 1B 450Hz 23 1.1kHz 2B 2.8kHz 33 7kHz 3B 18kHz 32Hz 80Hz 200Hz 500Hz 1.25kHz 3.15kHz 8kHz 20kHz 04 0C 14 1C 24 2C 34 3C 05 35Hz 0D 90Hz 15 220Hz 1D 560Hz 25 1.4kHz 2D 3.5kHz 35 9kHz 3D 0E 100Hz 40Hz 250Hz 630Hz 1.6kHz 4kHz 10kHz 06 16 1E 26 2E 36 3E 07 45Hz 0F 110Hz 17 280Hz 1F 700Hz 27 1.8kHz 2F 4.5kHz 37 11kHz 3F - Selection of quality factor (Q) Default = 4h Select Address Operational explanation Command 0 1 2 3 4 5 6 7 &h42 [ 3:0 ] Command 8 9 A B C D E F Quality factor 0.33 0.43 0.56 0.75 1.0 1.2 1.5 1.8 Quality factor 2.2 2.7 3.3 3.9 4.7 5.6 6.8 8.2 Selection of Gain Default = 40h Select Address Operational explanation Command 1C &h43 [ 6:0 ] Gain -18dB … … 3E 3F 40 41 42 -1dB -0.5dB 0dB +0.5dB +1dB … … 64 +18dB If the coefficient of b0, b1, b2, a1, and a2 exceeds ±4, it may not operate normally. www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 24/57 2012.03 - Rev.A Technical Note BU9414FV 4-7. MIDDLE MIDDLE of TONE Control uses Peaking filter. The setting is converted, in the IC, into digital filter’s coefficients (b0, b1, b2, a1, a2)by selecting the F,Q and Gain, and transmitted to coefficient RAM. The switching shock noise at the time of alteration of setting can be prevented by the smooth transition function. ○MIDDLE Control Selection of smooth transition function Default = 0 Select Address Value &h44 [ 6 ] 0 Using MIDDLE smooth transition function Operational explanation 1 Not MIDDLE using smooth transition function Selection of smooth transition time Default = 0 Select Address Value Operational explanation &h44 [ 5:4 ] 0 21.4ms 1 10.7ms 2 5.4ms 3 2.7ms Setting of smooth transition start In the case of using the smooth transition function, after being transmitted, by the &h44[0] command, to the coefficient RAM for smooth transition, the alteration of MIDDLE’s coefficients is completed by using this command. Default = 0 Select Address Value Operational explanation &h4C [ 1 ] 0 MIDDLE smooth transition stop 1 MIDDLE smooth transition start What is necessary is the time of waiting, which is more than the time selected by the setting of MIDDLE smooth transition time, from the time the MIDDLE smooth transition start (&h4C[1] = “1”) is executed until the following command is sent. Please make sure to perform the MIDDLE smooth transition stop(&h4C[1] = “0”) after the smooth transition is completed. Setting of the Start of transmitting to coefficient RAM In the case of using the smooth transition, it is transmitted to the coefficient RAM for smooth transition. In the case of not using of the smooth transition, it is transmitted to the direct coefficient RAM. Default = 0 Select Address Value &h44 [ 0 ] 0 MIDDLE coefficient transmission stop 1 MIDDLE coefficient transmission sart www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. Operational explanation 25/57 2012.03 - Rev.A Technical Note BU9414FV Selection of frequency(F0) Default = 0Eh Select Address Operational explanation &h45 [ 5:0 ] Command Frequency Command Frequency Command Frequency Command Frequency Command Frequency Command Frequency Command Frequency Command Frequency 20Hz 50Hz 125Hz 315Hz 800Hz 2kHz 5kHz 12.5kHz 00 08 10 18 20 28 30 38 01 22Hz 09 56Hz 11 140Hz 19 350Hz 21 900Hz 29 2.2kHz 31 5.6kHz 39 14kHz 63Hz 400Hz 2.5kHz 16kHz 25Hz 160Hz 1kHz 6.3kHz 02 0A 12 1A 22 2A 32 3A 03 28Hz 0B 70Hz 13 180Hz 1B 450Hz 23 1.1kHz 2B 2.8kHz 33 7kHz 3B 18kHz 32Hz 80Hz 200Hz 500Hz 1.25kHz 3.15kHz 8kHz 20kHz 04 0C 14 1C 24 2C 34 3C 05 35Hz 0D 90Hz 15 220Hz 1D 560Hz 25 1.4kHz 2D 3.5kHz 35 9kHz 3D 0E 100Hz 40Hz 250Hz 630Hz 1.6kHz 4kHz 10kHz 06 16 1E 26 2E 36 3E 07 45Hz 0F 110Hz 17 280Hz 1F 700Hz 27 1.8kHz 2F 4.5kHz 37 11kHz 3F - Selection of quality factor(Q) Default = 4h Select Address &h46 [ 3:0 ] Operational explanation Command 0 1 2 3 4 5 6 7 Quality factor 0.33 0.43 0.56 0.75 1.0 1.2 1.5 1.8 Command 8 9 A B C D E F Quality factor 2.2 2.7 3.3 3.9 4.7 5.6 6.8 8.2 Selection of Gain Default = 40h Select Address Operational explanation &h47 [ 6:0 ] Command 1C Gain -18dB … … 3E 3F 40 41 42 -1dB -0.5dB 0dB +0.5dB +1dB … … 64 +18dB If the coefficient of b0, b1, b2, a1, and a2 exceeds ±4, it may not operate normally. www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 26/57 2012.03 - Rev.A Technical Note BU9414FV 4-8. TREBLE TREBLE of TONE Control can use Peaking filter or High-shelf filter. The setting is converted, in the IC, into digital filter’s coefficients (b0, b1, b2, a1, a2)by selecting the F0,Q and Gain, and transmitted to coefficient RAM. The switching shock noise at the time of alteration of setting can be prevented by the smooth transition function. ○TREBLE Control Selection of filter types Default = 0 Select Address Value &h48 [ 7 ] 0 Peaking filter Operational explanation 1 High-shelf filter Selection of smooth transition function Default = 0 Select Address Value Operational explanation &h48 [ 6 ] 0 Using smooth transition function 1 Not using smooth transition function Selection of smooth transition time Default = 0 Select Address Value Operational explanation &h48 [ 5:4 ] 0 21.4ms 1 10.7ms 2 5.4ms 3 2.7ms Setting of smooth transition start In the case of using the smooth transition function, after being transmitted, by the &h48[0] command, to the coefficient RAM for smooth transition, the alteration of TREBLE’s coefficients is completed by using this command. Default = 0 Select Address Value Operational explanation &h4C [ 2 ] 0 TREBLE smooth transition stop 1 TREBLE smooth transition start What is necessary is the time of waiting, which is more than the time selected by the setting of TREBLE smooth transition time, from the time the TREBLE smooth transition start (&h4C[2] = “1”) is executed until the following command is sent. Please make sure to perform the TREBLE smooth transition stop(&h4C[2] = “0”) after the smooth transition is completed. &h4D [0] and &hF4 [0] are set to H during soft transition.(Refer to Chapter 15) www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 27/57 2012.03 - Rev.A Technical Note BU9414FV Setting of the Start of transmitting to coefficient RAM In the case of using the smooth transition, it is transmitted to the coefficient RAM for smooth transition. In the case of not using of the smooth transition, it is transmitted to the direct coefficient RAM. Default = 0 Select Address Value &h48 [ 0 ] 0 TREBLE coefficient transmission stop Operational explanation 1 TREBLE coefficient transmission start Selection of frequency(F0) Default = 0Eh Select Operational explanation Address &h49 [ 5:0 ] Command Frequency Command Frequency Command Frequency Command Frequency Command Frequency Command Frequency Command Frequency Command Frequency 20Hz 50Hz 125Hz 315Hz 800Hz 2kHz 5kHz 12.5kHz 00 08 10 18 20 28 30 38 01 22Hz 09 56Hz 11 140Hz 19 350Hz 21 900Hz 29 2.2kHz 31 5.6kHz 39 14kHz 63Hz 400Hz 2.5kHz 16kHz 25Hz 160Hz 1kHz 6.3kHz 02 0A 12 1A 22 2A 32 3A 03 28Hz 0B 70Hz 13 180Hz 1B 450Hz 23 1.1kHz 2B 2.8kHz 33 7kHz 3B 18kHz 32Hz 80Hz 200Hz 500Hz 1.25kHz 3.15kHz 8kHz 20kHz 04 0C 14 1C 24 2C 34 3C 05 35Hz 0D 90Hz 15 220Hz 1D 560Hz 25 1.4kHz 2D 3.5kHz 35 9kHz 3D 0E 100Hz 40Hz 250Hz 630Hz 1.6kHz 4kHz 10kHz 06 16 1E 26 2E 36 3E 07 45Hz 0F 110Hz 17 280Hz 1F 700Hz 27 1.8kHz 2F 4.5kHz 37 11kHz 3F - Selection of quality factor(Q) Default = 4h Select Address Operational explanation Command 0 1 2 3 4 5 6 7 &h4A [ 3:0 ] Quality factor 0.33 0.43 0.56 0.75 1.0 1.2 1.5 1.8 Command 8 9 A B C D E F Quality factor 2.2 2.7 3.3 3.9 4.7 5.6 6.8 8.2 Selection of Gain Default = 40h Select Address Operational explanation &h4B [ 6:0 ] Command 1C Gain -18dB … … 3E 3F 40 41 42 -1dB -0.5dB 0dB +0.5dB +1dB … … 64 +18dB If the coefficient of b0, b1, b2, a1, and a2 exceeds ±4, it may not operate normally. www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 28/57 2012.03 - Rev.A Technical Note BU9414FV 4-9. P2Bass (Perfect Pure Bass: Deep Bass Equalizer) It is the deep bass equalizer making it possible that even thin-screen TV, by which the enclosure of speaker is restricted, can reproduce the real sound close to powerful deep bass & original sound. Solid & clear deep bass with little feeling of distortion is realized. Even boosting of bass does not interfere with vocal band, therefore rich and natural deep band is realized. Gain Vocal band ボーカル帯域 22 P Bass gain Bassゲイン f LPF Cutoff frequency LPFカットオフ周波数 HPF Cutoff frequency HPFカットオフ周波数 2 ON/OFF of P Bass function Default = 0 Select Address &h73 [ 7 ] www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. Value Operational explanation 2 0 Not using of P Bass function 1 Using of P2Bass function 29/57 2012.03 - Rev.A Technical Note BU9414FV Setting of P2Bass deep bass gain Default = 00h Select Address Operational explanation Command 0 1 2 3 4 5 6 7 &h74 [ 7:4 ] Gain 0dB +1dB +2dB +3dB +4dB +5dB +6dB +7dB Command 8 9 A B C D E F Gain +8dB +9dB +10dB +11dB +12dB +13dB +14dB +15dB 2 Setting of P Bass HPF cutoff frequency Default = 0 Select Address Value Operational explanation &h74 [ 3:2 ] 0 60Hz 1 80Hz 2 100Hz 3 120Hz 2 Setting of P Bass HPF order Default = 0 Select Address Value &h73[ 1:0 ] 0 1st order Operational explanation 1 2nd order 2 OFF 2 Setting of P Bass LPF cutoff frequency Default = 0 Select Address Value &h74 [ 1:0 ] 0 120Hz 1 160Hz 2 200Hz 3 240Hz www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. Operational explanation 30/57 2012.03 - Rev.A Technical Note BU9414FV 4-10. Pseudo bass(Double sound) A Pseudo bass function is a function which turns into that it is possible to emphasize low frequency sound effectively also to the low speaker of low-pass reproduction capability. In order to be audible as the fundamental wave is sounding in false by adding 2 double sound and 3 time sound to a fundamental wave, the reproduction capability of the band of a fundamental wave becomes possible. Although use independently is also possible for a pseudo bass function, low-pitched sound can be emphasized more by combining with P2Bass function. Moreover, since it is possible to change the band to emphasize, optimizing to the frequency characteristic of the speaker to be used is possible. IN OUT A super-low-pass component is intercepted.(ex. fL=40Hz) HPF LPF1 A fundamental-wave component is extracted.(ex. fH=120Hz) Multiple sound (even number) Generator LPF2 The generated noise signal is operated orthopedically.(ex. fC=240Hz) Multiple sound (odd number) Generator LPF2 ON/OFF of pseudo bass function Pseudo bass sound (3 time sound) is used. Default = 0 Select Address Value Operational explanation &h7B [ 7 ] 0 Not using of pseudo bass(3 time sound) function 1 Using of pseudo bass(3 time sound) function Pseudo bass sound (2 time sound) is used. Default = 0 Select Address Value &h7B [ 6 ] 0 Not using of pseudo bass(2 time sound) function Operational explanation 1 Using of pseudo bass(2 time sound) function Setting of pseudo bass input HPF Default = 00h Select Address Operational explanation &h7B [ 2:0 ] Command 0 1 2 3 Frequency OFF 20Hz 30Hz 40Hz Command 4 5 6 7 Frequency 50Hz 60Hz 70Hz 80Hz Setting of order of LPF for 2 or 3 time sound. Default = 0 Select Address Value &h7C [ 7 ] 0 2nd order 1 4th order www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. Operational explanation 31/57 2012.03 - Rev.A Technical Note BU9414FV Setting of pseudo bass input LPF Default = 00h Select Address &h7C [ 6:4 ] Operational explanation Command 0 1 2 3 Frequency 40Hz 60Hz 80Hz 100Hz Command 4 5 6 7 Frequency 120Hz 140Hz 160Hz 180Hz Setting of order of LPF for 2 or 3 time sound. Default = 00h Select Address &h7C [ 3:0 ] Operational explanation Command 0 1 2 3 4 5 6 7 Frequency 80Hz 100Hz 120Hz 140Hz 160Hz 180Hz 200Hz 220Hz Command 8 9 A B C D E F Frequency 240Hz 260Hz 280Hz 300hz 320Hz 340Hz 360Hz 380Hz Setting of addition gain for 3 time sound Default = 00h Select Address &h7D[ 7:4 ] Operational explanation Command 0 1 2 3 4 5 6 7 Gain 0dB 1dB 2dB 3dB 4dB 5dB 6dB 7dB Command 8 9 A B C D E F Gain 8dB 9dB 10dB 11dB 12dB 13dB 14dB 15dB Setting of addition gain for 2 time sound Default = 00h Select Address &h7D[ 3:0 ] Operational explanation Command 0 1 2 3 4 5 6 7 Gain -6dB -5dB -4dB -3dB -2dB -1dB 0dB 1dB Command 8 9 A B C D E F Gain 2dB 3dB 4dB 5dB 6dB - Setting of subtraction gain for 3 time sound Default = 00h Select Address &h7E[ 2:0 ] www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. Operational explanation Command 0 1 2 3 32/57 Gain -∞ -12dB -10dB -8dB Command 4 5 6 7 Gain -6dB -4dB -2dB 0dB 2012.03 - Rev.A Technical Note BU9414FV 4-11. P2Treble (Perfect Pure Treble:Medium・High-band equalizer) It realizes good Clearness, sound stretch, and clear-cut manner. It realizes such an effect that the sound is raised and can be heard when speaker is located on the underside of a device. 2 ON/OFF of P Treble function Default = 0 Select Address &h75 [ 7 ] Value Operational explanation 2 0 Not using of P Treble function 1 Using of P2Treble function 2 Setting of P Treble medium・high-band gain Default = 0h Select Address &h76 [ 7:4 ] www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. Operational explanation Command 0 1 2 3 4 5 6 7 33/57 Gain 0dB +1dB +2dB +3dB +4dB +5dB +6dB +7dB Command 8 9 A B C D E F Gain +8dB +9dB +10dB +11dB +12dB +13dB +14dB +15dB 2012.03 - Rev.A Technical Note BU9414FV 4-12. Scaler Scaler adjusts the gain in order to prevent the overflow in DSP. Adjustable range is +24dB to -103dB and can be set by the step of 0.5dB. Scaler 1 does not incorporate the smooth transition function. Default = 30h Select Address Operational explanation Command 00 01 &h24 [ 7:0 ] … … 30 31 32 0dB -0.5dB -1dB … … 4-13. Gain +24dB +23.5dB FE FF -103dB -∞ 7 band・parametric equalizer 7-band parametric equalizer can use Peaking filter, Low-shelf filter or high-shelf filter. The setting is converted, in the IC, into digital filter’s coefficients (b0, b1, b2, a1, a2)by selecting the F,Q and Gain, and transmitted to coefficient RAM. There is no smooth transition function. Band1 Band2 Band3 Band4 Band5 Band6 Band7 Level ±18dB (0.5dB step) f 63 160 400 1k 2.5k 6.3k 16k (Hz) Selection of filter types Default = 0 Select Address Value Operational explanation bit[ 7:6 ] 0 Peaking filter It sets to all band 1 Low-shelf filter 2 High-shelf filter Setting of the Start of transmitting to coefficient RAM It is transmitted to direct coefficient RAM. Default = 0 Select Address Value bit [ 0 ] 0 Coefficient transmission stop It sets to all band 1 Coefficient transmission start www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. Operational explanation 34/57 2012.03 - Rev.A Technical Note BU9414FV Selection of frequency(F0) Default = 0Eh Select Operational explanation Address bit [ 5:0 ] It sets to all band Command Frequency Command Frequency Command Frequency Command Frequency Command Frequency Command Frequency Command Frequency Command Frequency 20Hz 50Hz 125Hz 315Hz 800Hz 2kHz 5kHz 12.5kHz 00 08 10 18 20 28 30 38 01 22Hz 09 56Hz 11 140Hz 19 350Hz 21 900Hz 29 2.2kHz 31 5.6kHz 39 14kHz 63Hz 400Hz 2.5kHz 16kHz 02 0A 12 1A 22 2A 32 3A 25Hz 160Hz 1kHz 6.3kHz 03 28Hz 0B 70Hz 13 180Hz 1B 450Hz 23 1.1kHz 2B 2.8kHz 33 7kHz 3B 18kHz 32Hz 80Hz 200Hz 500Hz 1.25kHz 3.15kHz 8kHz 20kHz 04 0C 14 1C 24 2C 34 3C 05 35Hz 0D 90Hz 15 220Hz 1D 560Hz 25 1.4kHz 2D 3.5kHz 35 9kHz 3D 06 16 1E 26 2E 36 3E 0E 100Hz 40Hz 250Hz 630Hz 1.6kHz 4kHz 10kHz 07 45Hz 0F 110Hz 17 280Hz 1F 700Hz 27 1.8kHz 2F 4.5kHz 37 11kHz 3F - Selection of quality factor(Q) Default = 4h Select Address Operational explanation Command 0 1 2 3 4 5 6 7 bit [ 3:0 ] It sets to every band Quality factor 0.33 0.43 0.56 0.75 1.0 1.2 1.5 1.8 Command 8 9 A B C D E F Quality factor 2.2 2.7 3.3 3.9 4.7 5.6 6.8 8.2 Selection of Gain Default = 40h Select Address Operational explanation bit [ 6:0 ] Command 1C It sets to every band Gain -18dB … … 3E 3F 40 41 42 -1dB -0.5dB 0dB +0.5dB +1dB … … 64 +18dB If the coefficient of b0, b1, b2, a1, and a2 exceeds ±4, it may not operate normally. The Select Address of each band is shown in the table below: Band1 Band2 Band3 Band4 Band5 Band6 Band7 &h50h &h54h &h58h &h5Ch &h60h &h64h &h68h F(frequency)selection bit [ 5:0 ] &h51h &h55h &h59h &h5Dh &h61h &h65h &h69h Q(Quality Factor) selection bit [ 3:0 ] &h52h &h56h &h5Ah &h5Eh &h62h &h66h &h6Ah Gain selection bit [ 6:0 ] &h53h &h57h &h5Bh &h5Fh &h63h &h67h &h6Bh Selection of filter type bit [ 7:6 ] Setting of the coefficient RAM Start of transmitting to bit [ 0 ] www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 35/57 2012.03 - Rev.A Technical Note BU9414FV 4-14. Main output EVR (Electronic volume) Volume is from+24dB to -103dB, and can be selected by the step of 0.5dB. At the time of switching of Volume, smooth transition is performed. The smooth transition time takes about 22ms in the case of transiting from 0dB. (Fixed) Setting of Volume Default = FFh Select Address Operational explanation Command 00 01 &h26 [ 7:0 ] Gain +24dB +23.5dB … … 30 31 32 0dB -0.5dB -1dB … … FE FF -103dB -∞ 4-15. Main output balance Balance can be attenuated, by the step width of 1dB, from the Volume setting value. At the time of switching, smooth transition is performed. At the time of switching of Balance, smooth transition is performed. The smooth transition time takes about 22ms. (Fixed) Setting of L/R Balance Default = 80h Select Address Operational explanation Command 00 01 &h27 [ 7:0 ] Rch -∞ -126dB … … … 7E 7F 80 81 0dB 0dB 0dB -1dB -1dB 0dB 0dB 0dB … … … 4-16. Lch 0dB 0dB FE FF -126dB -∞ 0dB 0dB Main output postscaler It performs the level adjustment when the data calculated in the 32-bit-width DSP is outputted in the form of 24bitwidth. Adjustable range is from +24dB to -103dB and can be set by the step of 0.5dB. There is no smooth transition function in Postscaler. Default = 30h Select Address Operational explanation Command 00 01 &h28 [ 7:0 ] … 30 31 32 0dB -0.5dB -1dB … … 36/57 … www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. Gain +24dB +23.5dB FE FF -103dB -∞ 2012.03 - Rev.A Technical Note BU9414FV 4-17. 2 Band dynamic range compression Like the explosion in TV commercials or a movie, it is the function to control volume automatically and to adjust volume so that a televiewer may not be surprised, when sound becomes large suddenly. Compression operation is performed about each two band of low-pass and a high region. Moreover, the high region builds in LPF for preventing the incorrect reaction to the pilot signal of an image. Input Max A_RATE R_RATE Output min DET BASS and MIDDLE frequency component is extracted. LPF1 IN OUT MIDDLE and TREBLE frequency component is extracted. DET LPF2 ON/OFF low frequency DRC . Default = 0 Select Address Value &h18 [ 7 ] 0 Use low frequency DRC 1 Not use low frequency DRC www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. Operational explanation 37/57 2012.03 - Rev.A Technical Note BU9414FV ON/OFF high frequency DRC . Default = 0 Select Address Value Operational explanation &h18 [ 6 ] 0 Use high frequency DRC 1 Not use high frequency DRC Setting of LPF(LPF2) . Default = 0 Select Address Value &h19 [ 5:4 ] 0 OFF Operational explanation 1 1st order 2 2nd order Setting of LPF(LPF1) . Default = 00h Select Address &h19 [ 3:0 ] Operational explanation Command 0 1 2 3 4 5 6 7 Frequency スルー 200Hz 400Hz 600Hz 800Hz 1000Hz 1200Hz 1400Hz Command 8 9 A B C D E F Frequency 1600Hz 1800Hz 2000Hz - Setting of low frequency A_RATE. Default = 0h Select Address &h1A [ 6:4 ] Operational explanation Command 0 1 2 3 Time 1ms 2ms 3ms 4ms Command 4 5 6 7 Time 5ms 10ms 20ms 40ms Setting of low frequency R_RATE. Default = 0h Select Address &h1A [ 3:0 ] www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. Operational explanation Command 0 1 2 3 4 5 6 7 38/57 R_RATE 0.25s 0.5s 0.75s 1s 1.25s 1.5s 2s 2.5s Command 8 9 A B C D E F R_RATE 3s 4s 5s 6s 7s 8s 9s 10s 2012.03 - Rev.A Technical Note BU9414FV Setting of low frequency A_TIME. Default = 0h Select Address &h1B [ 6:4 ] Operational explanation Command 0 1 2 3 A_TIME 0.5ms 1ms 1.5ms 2ms Command 4 5 6 7 A_TIME 3ms 4ms 5ms 6ms Setting of low frequency R_TIME. Default = 0h Select Address &h1B [ 2:0 ] www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. Operational explanation Command 0 1 2 3 39/57 R_TIME 50ms 100ms 150ms 200ms Command 4 5 6 7 R_TIME 300ms 400ms 500ms 600ms 2012.03 - Rev.A Technical Note BU9414FV Setting of high frequency A_RATE. Default = 0h Select Address &h1C [ 6:4 ] Operational explanation Command 0 1 2 3 Time 1ms 2ms 3ms 4ms Command 4 5 6 7 Time 5ms 10ms 20ms 40ms Setting of high frequency R_RATE. Default = 0h Select Address &h1C [ 3:0 ] Operational explanation Command 0 1 2 3 4 5 6 7 R_RATE 0.25s 0.5s 0.75s 1s 1.25s 1.5s 2s 2.5s Command 8 9 A B C D E F R_RATE 3s 4s 5s 6s 7s 8s 9s 10s Setting of high frequency A_TIME. Default = 0h Select Address &h1D [ 6:4 ] Operational explanation Command 0 1 2 3 A_TIME 0.5ms 1ms 1.5ms 2ms Command 4 5 6 7 A_TIME 3ms 4ms 5ms 6ms Setting of high frequency R_TIME. Default = 0h Select Address &h1D [ 2:0 ] www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. Operational explanation Command 0 1 2 3 40/57 R_TIME 50ms 100ms 150ms 200ms Command 4 5 6 7 R_TIME 300ms 400ms 500ms 600ms 2012.03 - Rev.A Technical Note BU9414FV 4-18. Main output clipper When measuring the rated output (practical maximum output), it is measured where the total distortion rate (THD+N) is 10%. Clipping with any output amplitude is possible by using of clipper function, for example, the rated output of 10W or 5W can be obtained by using an amplifier with 15W output. Clip Level Please set the &h27[7] at “H” when using of clipper function. Default = 0 Select Address Value Operational explanation &h29 [ 7 ] 0 Not using clipper function 1 Using clipper function Clip level is set in the form of higher-order 8 bit&h2A[7:0] and lower-order 8 bit&h2B[7:0]. 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 clip_level[15:0] 0 0 1 ~clip_level[15:0] 1 1 4 1 0 0 1 3 1 0 0 1 2 1 0 0 1 1 1 0 0 1 0 1 0 0 1 Maximum value Minimum value A positive clip level A negative clip level The clip leve l becomes narrow if the setting value is reduced. Negative clip level is set in such a way that it is the inversion data of positive clip level. 4-19. Selection of sub input data Selection of Sub input (Sub woofer processing etc.). The Sub woofer output interlocked with P2Bass’s gain setting is possible by inputting the data that after P2Bass processing. In addition, in BU9414FV, the data can be inputted from SP conversion2. Default = 0 Select Address Value &h2F [ 1:0 ] 0 Inputting of data that are after scaler 1 1 Inputting of data that are after P2Bass processing 2 Inputting of data from SP conversion2 www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. Operational explanation 41/57 2012.03 - Rev.A Technical Note BU9414FV 4-20. Sub output EVR (electronic volume) The volume for sub output can select with 0.5dB step from +24dB to -103dB. When changing volume, smooth transition is done. Smooth transition duration is required approximately 22ms when it is from 0dB. (Fixed) Volume setting Default = FFh Select Address Operating explanation Command 00 01 &h2C [ 7:0 ] Gain +24dB +23.5dB … … 30 31 32 0dB -0.5dB -1dB … … FE FF -103dB -∞ 4-21. Sub output balance As for sub output balance, it is possible to be attenuated at 1dB step width from volume setting value. When changing, smooth transition is done. When changing balance, smooth transition is done. Smooth transition duration is required approximately 22ms. (Fixed) L/R Balance setting Default = 80h Select Address Operating explanation Command 00 01 &h2D [ 7:0 ] Rch -∞ -126dB … … … 7E 7F 80 81 0dB 0dB 0dB -1dB -1dB 0dB 0dB 0dB … … … 4-22. Lch 0dB 0dB FE FF -126dB -∞ 0dB 0dB Sub output post scaler The occasion when the data which is calculated with DSP of 32bit width is output at 24bit width, level adjustment is done. The adjustment range can be set with 0.5dB step from +24dB to -103dB. There is no smooth transition function in the sub output post scaler. Default = 30h Select Address Operating explanation Command 00 01 &h2E [ 7:0 ] … 30 31 32 0dB -0.5dB -1dB … … 42/57 … www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. Gain +24dB +23.5dB FE FF -103dB -∞ 2012.03 - Rev.A Technical Note BU9414FV 4-26. Sub output clipper The case when rated output (practical maximum output) of the television is measured, total harmonic distortion + noise (THD+N) measures at the place of 10%. It can obtain the rated output of 10W and 5W for example making use of the amplifier of 15W output, because it is possible to clip with optional output amplitude by using the clipper function. C lip L e v e l Please designate &h30 [7] as” H when function. using sub output clipper Default = 0 Select Address Value Operating explanation &h30 [ 7 ] 0 Clipper function is not used 1 Clipper function is used As for clip level, it sets with superior 8 bits &h31 [7: 0] and subordinate 8 bits &h32 [7: 0]. 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 clip_level[15:0] 0 0 1 ~clip_level[15:0] 1 1 4 1 0 0 1 3 1 0 0 1 2 1 0 0 1 1 1 0 0 1 0 1 0 0 1 Maximum value Minimum value A positive clip level A negative clip level When settin g value is made small, clip level becomes narrow. As for negative clip level, the reversal data of positive clip level is set. www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 43/57 2012.03 - Rev.A Technical Note BU9414FV 4-27. Direct setting five coefficient of b0, b1, b2, a1 and a2 of Bi-quad Filter 7 bands Parametric Equalizer of main output and of 3 bands Parametric Equalizer of sub output have used the secondary IIR type digital filter (Bi-quad Filter). It is possible to set five coefficient 24 bit of b0, b1, b2, a1 and a2 of Bi-quad Filter (-4~+4) directly from an external. When this function is used, it can do the filter type and frequency setting, Q value (quality factor) setting and gain setting other than Peaking, Low-Shelf and High-Shelf unrestrictedly. (Note) five coefficient have the necessity to make below the ±4, there is no read-out function of setting value and an automatic renewal function of coefficient RAM. Register for the coefficient transfer of 24bit Before transferring into coefficient RAM in a lumping, the data is housed in the register for coefficient transfer from the micro-computer. Default = 00h Select Address Operating explanation &h8D [ 7:0] bit[23:16] which transfers 24 bit coefficient &h8E [ 7:0] bit[15:8] which transfers 24 bit coefficient &h8F [ 7:0] bit[7:0] which transfers 24 bit coefficient It starts to transmit the coefficient of 24bit into coefficient RAM Default = 0 Select Address Value &h8C [ 7 ] 0 Coefficient transmission stop Operating explanation 1 Coefficient transmission start Coefficient number appointment of coefficient RAM Default = 00h Select Address Operating explanation &h8C [ 6:0] Coefficient number appointment of coefficient RAM Appointment of coefficient number other than 14H↔45H is prohibition Main output 7Band Parametric EQ Coefficient number : Coefficient number : Coefficient number : Coefficient number : Coefficient number : Coefficient number : 14H. 19H. 1EH. 23H. 28H. 2DH. b0 Z-1 15H. b1 + + + + b0 17H 1AH. b1 -1 Z 18H 16H. b2 BAND1 (Main) + Z-1 Z-1 a1 -1 + Z Z + + b0 1CH a2 1FH. b1 -1 1BH. b2 1DH BAND2 (Main) + Z-1 Z-1 a1 -1 + + + b0 21H Z 22H 20H. a2 24H. b1 -1 Z b2 BAND3 (Main) + Z-1 Z-1 a1 -1 + Z + + b0 26H Z 27H 25H. a2 b2 29H. b1 Z -1 + + b0 2BH 2EH. b1 -1 2AH. b2 2CH BAND5 (Main) a2 + Z 32H. + Z-1 Z-1 a1 -1 Z a2 BAND4 (Main) + Z-1 Z-1 a1 -1 + Coefficient number : b0 30H + + 33H. a1 -1 b1 -1 Z 2FH. b2 31H BAND6 (Main) a2 + + Z-1 Z-1 Z 35H + + 34H. b2 Coefficient number : 37H. 3CH. b0 + + Z-1 38H. b1 b0 3AH + Z-1 39H. + Z-1 Z-1 a1 3BH b2 BAND1 (Sub) a2 3DH. b1 Coefficient number : + 41H. + b0 3FH + + Z-1 Z-1 3EH. b2 BAND2 (Sub) www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. a2 + Z-1 Z-1 42H. a1 40H + b1 44H + + Z-1 Z-1 43H. Z-1 a1 45H b2 Z-1 a2 BAND3 (Sub) 44/57 36H BAND7 (Main) Sub output 3Band Parametric EQ Coefficient number : a1 -1 Z 2012.03 - Rev.A Z-1 a2 Z-1 Technical Note BU9414FV 4-28. About the automatic renewal of five coefficients of b0, b1, b2, a1 and a2 of Bi-quad Filter BASS, MIDDLE, TREBLE, main output 7 bands Parametric Equalizer and sub output 3 band Parametric Equalizer have used coefficient RAM. As for this coefficient RAM, because direct access is not possible from the micro-computer, it cannot refresh the register efficiently. There is an automatic renewal function of coefficient RAM in this DSP, the automatic write-in renewal of coefficient RAM is possible by using this function. However when 4-26 「the function of direct setting a coefficient RAM」 is utilized, it is not possible to utilize automatic write-in renewal. Selection of using the automatic write-in renewal function Default = 0 Select Address Value Operating explanation &h6D [ 0 ] 0 Automatic write-in renewal function is used 1 Automatic write-in renewal function is not used The separate setting of Filter of automatic write-in renewal function Default = 00h Select Address Filter &h6E [ 0 ] BASS Operating explanation 0:Automatic renewal function OFF 1:Automatic renewal function ON &h6E [ 1 ] MIDDLE 0:Automatic renewal function OFF 1:Automatic renewal function ON &h6E [ 2 ] TREBLE &h6F [ 0 ] Main MAND1 0:Automatic renewal function OFF 1:Automatic renewal function ON 0:Automatic renewal function OFF 1:Automatic renewal function ON &h6F [ 1 ] Main MAND2 0:Automatic renewal function OFF 1:Automatic renewal function ON &h6F [ 2 ] Main MAND3 0:Automatic renewal function OFF 1:Automatic renewal function ON &h6F [ 3 ] Main MAND4 0:Automatic renewal function OFF 1:Automatic renewal function ON &h6F [ 4 ] Main MAND5 0:Automatic renewal function OFF 1:Automatic renewal function ON &h6F [ 5 ] Main MAND6 0:Automatic renewal function OFF 1:Automatic renewal function ON &h6F [ 6 ] Main MAND7 0:Automatic renewal function OFF 1:Automatic renewal function ON www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 45/57 2012.03 - Rev.A Technical Note BU9414FV 5. P-S conversion 1 ,P-S conversion 2 Two parallel serial conversion circuits are built in BU9414FV. (P-S conversion 1, P-S conversion 2) P-S conversion 1 convert the Main output of DSP from SDATAO1, LRCKO, and BCKO (34,35,36pin) into three line serial data and output the data. P-S conversion 2 convert the sub output of DSP from SDATAO1, LRCKO, and BCKO (33,35,36pin) into three line serial data and output the data. Output format has the IIS mode, left-align mode, and right-align mode. 16 each bit, 20bit, and 24bit output can also be selected. The figure below shows the timing chart of each transmission mode. IIS mode IIS方式 LRCKO BCKO 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 MSB 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 1 LSB 2 3 4 5 6 7 8 9 10 11 12 13 14 15 MSB S DATAO 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 LSB S 16bit 16bit 20bit 20bit 24bit 24bit left-align mode 左詰方式 LRCKO BCKO 1 2 3 4 5 6 7 8 9 10 11 12 13 14 MSB DATAO 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 LSB 1 2 3 4 5 6 7 8 9 10 11 12 13 14 MSB S 15 16 LSB S 16bit 16bit 20bit 20bit 24bit 24bit right-align mode 右詰方式 LRCKO BCKO 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 MSB 31 32 1 2 3 LSB S DATAO 4 5 6 7 8 9 10 11 12 13 14 15 16 MSB LSB S 16bit 16bit 20bit 20bit 24bit 24bit 5-1. Format setting of three line serial output Default = 0 Select Address Value Operating Description P-S conversion 1 &h0D [ 3:2 ] 0 IIS mode P-S conversion 2 & h0E [ 3:2 ] 1 left-align mode 2 right-align mode 5-2. Setting data bit width of three line serial output Default = 0 Select Address Value P-S conversion 1 &h0D [ 1:0 ] 0 16 bit P-S conversion 2 & h0E [ 1:0 ] 1 20 bit 2 24 bit www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. Operating Description 46/57 2012.03 - Rev.A Technical Note BU9414FV 6. Mute function by command Mute function by command is provided in BU9414FV. It's possible to mute DSP's main and sub digital output by setting to &hF4 [ 4 ] = 1h and MUTEX_DAC terminal and a MUTEX_SP terminal both to L. Setting the transition time of smooth mute Mute the Main and Sub output of DSP. Select the transition time of entering from 0dB to mute state. Smooth transition time when releasing mute is about 22ms(fixed) . Default = 0 Select Address Value Operating Description &h10 [ 1:0 ] 0 Don’t use mute function. 1 10.8ms 2 5.4ms 3 2.7ms Soft mute release time setup Setting of soft mute release start time from detect soft mute release state Default = 0 7. Select Address Value Operating Description &h10 [ 7:6 ] 0 0ms 1 100ms 2 200ms 3 300ms Clock halt function of DSP part Clock halt function of DSP part with terminal MUTEX_DAC and MUTEX_SP is provided in BU9414FV. Clock halt function’s setting Default = 0 Select Address Value Operating Description &hA9 [ 7 ] 0 Don’t use the clock halt function 1 Use the clock halt function When setting on using the clock halt function, then set the MUTEX_DAC and MUTEX_SP terminal on L ,the clock of DSP part will be halted. If clock is halted, command can’t be sent and received in a part of the block. If &hA9 [ 7 ] is input from MCLK into clock, command can be sent and received even on the clock halt condition. When MUTEX_DAC or MUTEX_SP terminal is on H, the clock halt will be released. Power consumption decreases in the clock halt condition. www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 47/57 2012.03 - Rev.A Technical Note BU9414FV 8. Command sent after releasing reset Please send the following command after releasing reset including power supply on. 0. Power supply turning on ↓ ○ Please input the clock from the outside. When the clock is not input, reset can't normally be done. ↓ 1. Reset release (RESETB="H") ↓ 2. &hA0[7:0] = C2h :Set PLLA. ↓ 3. &hF3[5:0] = 08h :Set the dividing frequency ratio of MCLK. Please do as follows to set a value by fs of MCLK. (MCLK:512fs=08h、256fs=04h、128fs=02h) ↓ 4. &hF5[3:0] = 01h:Set the dividing frequency ratio of PLL. ↓ 5. &hF6[7:0] = 00h:Set the phase adjust command of PLL. ↓ 6. &hF1[4] = 0:Enable analog input. ↓ 7. &h08[5:4] = 1h :Select system clock is PLL. ↓ 8. &hA7[7:0] = F4h:Synchronous detection condition setting 1 for PLLA is initialized. ↓ 9. &hA8[7:0] = 33h:Synchronous detection condition setting 2 for PLLA is initialized. ↓ 10. &hA9[3:0] = 3h:Synchronous detection condition setting 3 for PLLA is initialized. ↓ 11. &hA9[5:4] = 2h or 1h or 0h :Set MCLK. (Set in “2h”While MCLK is 512fs, set in “1h”While MCLK is 256fs, set in “0h”While MCLK is 128fs.) ↓ ○ It is about 10ms wait until PLL is steady. ↓ 12. &hAA[7:0] = 80h :A data taking-in position is adjusted. ↓ 13. Read back &hAA[7] address data and check read result is 0. ↓ ○ It is about 5ms wait until RAM all address clear. ↓ 14.&h01 = 00h : Set ram clear off. ↓ 15. Other register setting &h26[7:0] = **h :Release the mute of the Main output volume(30h=0dB). &h2C[7:0] = **h :Release the mute of the Sub output volume(30h=0dB). www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 48/57 2012.03 - Rev.A Technical Note BU9414FV 9. About frequency setting such as tone control and parametric equalizer Because the sampling rate converter is not built into BU9414FV, the calculation clock of DSP is changed according to the input sampling rate of I2S. Because sampling rate describes the frequency on the assumption of 48kHz in this function specification, conversion is needed in case of sampling frequency of 44.1kHz and 32kHz. Please refer to the table below for F0 setting of tone control (Bass, Middle, Treble) and parametric equalizer. F0 (fs=48kHz) Command Frequency Command Frequency Command Frequency Command Frequency Command Frequency Command Frequency Command Frequency Command Frequency 20Hz 50Hz 125Hz 315Hz 800Hz 2kHz 5kHz 12.5kHz 00 08 10 18 20 28 30 38 01 22Hz 09 56Hz 11 140Hz 19 350Hz 21 900Hz 29 2.2kHz 31 5.6kHz 39 14kHz 02 0A 12 1A 22 2A 32 3A 25Hz 160Hz 1kHz 6.3kHz 63Hz 400Hz 2.5kHz 16kHz 03 28Hz 0B 70Hz 13 180Hz 1B 450Hz 23 1.1kHz 2B 2.8kHz 33 7kHz 3B 18kHz 04 0C 14 1C 24 2C 34 3C 32Hz 80Hz 200Hz 500Hz 1.25kHz 3.15kHz 8kHz 20kHz 05 35Hz 0D 90Hz 15 220Hz 1D 560Hz 25 1.4kHz 2D 3.5kHz 35 9kHz 3D 40Hz 250Hz 630Hz 1.6kHz 4kHz 10kHz 06 16 1E 26 2E 36 3E 0E 100Hz 07 45Hz 0F 110Hz 17 280Hz 1F 700Hz 27 1.8kHz 2F 4.5kHz 37 11kHz 3F - F0 (fs=44.1kHz) Command Frequency Command Frequency Command Frequency Command Frequency Command Frequency Command Frequency Command Frequency Command Frequency 00 01 02 03 04 05 06 07 18Hz 20Hz 23Hz 26Hz 29Hz 32Hz 37Hz 41Hz 08 09 0A 0B 0C 0D 0E 0F 46Hz 51Hz 58Hz 64Hz 74Hz 83Hz 92Hz 101Hz 10 11 12 13 14 15 16 17 115Hz 129Hz 147Hz 165Hz 184Hz 202Hz 230Hz 257Hz 18 19 1A 1B 1C 1D 1E 1F 289Hz 322Hz 368Hz 413Hz 459Hz 515Hz 579Hz 643Hz 20 21 22 23 24 25 26 27 735Hz 827Hz 919Hz 1.01kHz 1.15kHz 1.29kHz 1.47kHz 1.65kHz 28 29 2A 2B 2C 2D 2E 2F 1.84kHz 2.02kHz 2.3kHz 2.57kHz 2.89kHz 3.22kHz 3.68kHz 4.13kHz 30 31 32 33 34 35 36 37 4.59kHz 5.15kHz 5.79kHz 6.43kHz 7.35kHz 8.27kHz 9.19kHz 10.1kHz 38 39 3A 3B 3C 3D 3E 3F 11.5kHz 12.9kHz 14.7kHz 16.5kHz 18.4kHz - F0 (fs=32kHz) Command Frequency Command Frequency Command Frequency Command Frequency Command Frequency Command Frequency Command Frequency Command Frequency 00 01 02 03 04 05 06 07 13Hz 15Hz 17Hz 19Hz 21Hz 23Hz 27Hz 30Hz 08 09 0A 0B 0C 0D 0E 0F 33Hz 37Hz 42Hz 47Hz 53Hz 60Hz 67Hz 73Hz 10 11 12 13 14 15 16 17 www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 83Hz 93Hz 107Hz 120Hz 133Hz 147Hz 167Hz 187Hz 18 19 1A 1B 1C 1D 1E 1F 210Hz 233Hz 267Hz 300Hz 333Hz 373Hz 420Hz 467Hz 49/57 20 21 22 23 24 25 26 27 533Hz 600Hz 667Hz 733Hz 833Hz 933Hz 1.07kHz 1.2kHz 28 29 2A 2B 2C 2D 2E 2F 1.33kHz 1.47kHz 1.67kHz 1.87kHz 2.1kHz 2.33kHz 2.67kHz 3kHz 30 31 32 33 34 35 36 37 3.33kHz 3.73kHz 4.2kHz 4.67kHz 5.33kHz 6kHz 6.67kHz 7.33kHz 38 39 3A 3B 3C 3D 3E 3F 8.33kHz 9.33kHz 10.7kHz 12kHz 13.3kHz - 2012.03 - Rev.A Technical Note BU9414FV 10. About a setup of a clock, and the input of a command The input of MCLK is decided by combination of three kinds of sampling rates (fs=32kHz, 44.1kHz, 48kHz), and three kinds of magnifications (128 times, 256 times, 512 times). Sampling rate(fs) MCLK clock 32kHz 44.1kHz 48kHz 128fs 4.096MHz 5.6448MHz 6.144MHz 256fs 8.192MHz 11.2896MHz 12.288MHz 512fs 16.384MHz 22.5792MHz 24.576MHz In order that PLL may multiple the dividing output of MCLK, the dividing ratio of MCLK is not concerned with a sampling rate like explanation in Chapter 8, but is decided by the magnification of MCLK. MCLK clock &hF3[5:0] 128fs 04h 256fs 08h 512fs 10h Therefore, as for the case of the input of 4.096MHz-6.144NHz, and a 256fs setup, in the input frequency of MCLK, in a 128fs setup, a 16.384MHz - 24.576MHz input serves as a range which can be operated in a 8.192MHz - 12.288MHz input and a 512fs setup. &hF3[5:0] MCLK DIV PLLA PLL_DIV DSP S E L 1 I2C CONTROL LOGIC AUDIO IF &h08[5:4] ERROR_DET S E L 2 BU9414FV Clock line SYSCLKO The clock system figure of BU9414FV is as mentioned above. (1) In the case of &h08 [5:4] =1, the block of an above figure light blue operates with a PLL clock. (2) In the case of &h08 [5:4] =0, the block of an above figure light blue operates by MCLK. Be careful of the following points at the time of a command input. In (1), a part of blocks containing DSP are operating with the clock of PLL. Therefore, even if MCLK is the range which is 4.096MHz - 24.576MHz, when a setup of PLL and the setup of &hF3 are not performed correctly, a command may not be received other than command &h08 of a system control system, &hA0-&hA9, &hB0-&hBA, &hD0, &hF0 - &hFA. In (2), the whole operates with the clock of MCLK. If MCLK is the range which is 4.096MHz - 24.576MHz, all blocks will receive an I2C command. www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 50/57 2012.03 - Rev.A Technical Note BU9414FV 11. About the change of a sampling rate 11-1. When a sampling rate change can predict beforehand When the change of a sampling rate can predict beforehand, please switch a sampling rate in the following procedures. 1.The mute of the DAC is carried out (MUTEX_SP and MUTEX_DAC are set to L and it is a mute about BD5446.). ↓ 2. EVR is set as -infinity. ↓ 3. Set prescaler as -infinity. ↓ 4. A RAM clearance is carried out by setting it as &h01= C0h. ↓ 5. &h08[5:4] = by setting it as 0, the whole clock is switched to MCLK. ↓ 6. Switch a sampling rate. ↓ 7. Switch to a PLL clock after stabilizing the input of MCLK by setting it as more 10 msec WAIT and &h08 [5:4] =1h, since it is PLL stability. ↓ 8. &hAA[7:0] = 80h :A data taking-in position is adjusted. ↓ 9. Read back &hAA[7] address data and check read result is 0. ↓ ○ It is about 5ms wait until RAM all address clear. ↓ 10.&h01 = 00h : Set ram clear off. ↓↓ 11. Since the coefficient is cleared, please set up DSP. ↓ 12. Please cancel a DAC mute. 11-2. When a sampling rate change cannot predict beforehand Please do the following work, when the change of a sampling rate cannot predict beforehand, and having switched is detected. 1.The mute of the DAC is carried out (MUTEX_SP and MUTEX_DAC are set to L and it is a mute about BD5446.). ↓ ○When the input of MCLK has stopped, please do not input a command until MCLK is inputted again. Please perform the following setup, after MCLK is inputted on the frequency of specification within the limits. ↓ 2. It is set as &h08[5:4] = 0 and the whole clock is switched to MCLK. ↓ 3.Switch to a PLL clock after stabilizing the input of MCLK by setting it as more 10 msec WAIT and &h08 [5:4] =1h, since it is PLL stability. ↓ 4.A RAM clearance is carried out by setting it as &h01= C0h. ↓ 5.EVR is set as -infinity. ↓ 6.Prescaler is set as -infinity. ↓ 7. &hAA[7:0] = 80h :A data taking-in position is adjusted. ↓ 8. Read back &hAA[7] address data and check read result is 0. ↓ ○ It is about 5ms wait until RAM all address clear. ↓ 9.&h01 = 00h : Set ram clear off. ↓ 10.Since the coefficient is cleared, please set up DSP. ↓ 11.Please cancel a DAC mute. www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 51/57 2012.03 - Rev.A Technical Note BU9414FV 11-3. When the frequency more than a stop or the specification range does not enter [ MCLK ] at the time of a sampling rate change When switching a sampling rate, the clock of the frequency more than the specification range does not go into MCLK, but when input data is 0, it can return with the following procedures. 1. Carry out the mute of the DAC (MUTEX_SP and MUTEX_DAC are set to L and it is a mute about BD5446.) ↓ ○When the input of MCLK has stopped, please do not input a command until MCLK is inputted again. Please perform the following setup, after MCLK is inputted on the frequency of specification within the limits. ↓ 2. It is 10ms or more WAIT because of PLL stability. ↓ ○When the section where MCLK stopped or the relation with I2S input had collapsed in the midst of the midst of soft transition and transmission of a coefficient exists, the coefficient may not be able to be transmitted well. When soft transition and a coefficient are transmitting, please perform a setup from 11-2 4. Please perform the following setup, when you are not the midst of soft transition or transmission of a coefficient. ↓ 3. &hAA[7:0] = 80h :A data taking-in position is adjusted. ↓ 4. Read back &hAA[7] address data and check read result is 0. ↓ 5. Please cancel a DAC mute. www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 52/57 2012.03 - Rev.A Technical Note BU9414FV 12. When the clock which exceeded the specification range from MCLK is inputted When the frequency beyond fs=48kHz is inputted from Frequency MCLK in the state where it was set as &h08 [5:4] =1, since PLL follows inputted MCLK, as shown in the right figure, when it exceeds Time Ter, it will exceed the frequency in The frequency limit that DSP can operate which DSP can operate. In this case, an allophone may carry out irrespective of the existence of data. PLL output frequency When you change into such a state, please carry out the mute of the DAC immediately, apply reset (RESETB=L), and do the work after reset release of Chapter 8. 48kHz MCLK inputted frequency The time of Ter serves as about 70 usec. Time Ter www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 53/57 2012.03 - Rev.A Technical Note BU9414FV 13. Audio Interface Signal Specification ○Electric specification and timing of MCK, BCK, LRCK, and SDATA1 and SDATA2 1/fM CLK M CLK 1/fLR CK LR CK tBCK BC K tBCKH tBC KL Fig 1-2 Clock timing LRC K tBLR DG tLBRD G BC K tHD;SD tSU;SD SDATA1,SDATA 2 Fig 1-3 Audio interface timing Parameter 1 2 3 4 MCK LRCK 5 6 BCK 7 Sign Min. Max. Unit Frequency fSCLK 4.096 24.576 MHz DUTY dSCLK 40 60 % Frequency fLRCK 32 48 kHz DUTY dLRCK 40 60 % Cycle tBCK 325 - ns H width tBCKH 130 - ns L width tBCKL 130 - ns 8 It is time to the edge of LRCK from a BCK rising edge.*1 tBLRDG 20 - ns 9 It is time to a BCK rising edge from the edge of LRCK.*1 tLBRDG 20 - ns 10 Setup time of SDATA tSU;SD 20 - ns 11 Hold time of SDATA tHD;SD 20 - ns *1 This standard value has specified that the edge of LRCK and the rising edge of BCK do not overlap. www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 54/57 2012.03 - Rev.A Technical Note BU9414FV 14. Notes at the Time of Reset Since the state of IC is not decided, please make it into RESETX=L at the time of a power supply injection, and surely apply reset. Reset of BU9414FV is performing noise removal by MCLK. Therefore, in order to apply reset, a MCLK clock pulse is required of the state of RESETX=L more than 10 times. The power-on reset after a power supply injection, and when you usually apply reset at the time of operation, please be sure to carry out in the state where the clock is inputted, from MCLK. 15. Read-out of Soft Transition Flag It is set to &hF4[0] =H, &hFD[0]=H when BASS, MIDDLE, TREBLE or P2Bass, and P2Treble are soft transiting. It is possible to check whether soft transition is completed by reading &hF4 [0]or &hFD[0] Soft transition will be completed if the read-out result of &hF4 [0] or &hFD [0] is L. 16. Data taking-in position adjustment circuit There is a circuit which adjusts the position of data taking in so that data can be received, even when the incoming signal is shaking by jitter. DSP clock use multiplied input clock by PLL. Even when I2S signal inputted is shaking by jitter, the taking-in position of data is adjusted to the position which has a margin most so that take data and they may not be spilt. Adjust a data taking-in position by making it &hAA[7] =H. The read-out value of &hAA[7] is set to H during adjustment of a data taking-in position. It reads, after adjustment of a data taking-in position finishes, and a value is set to L. The reset release back, the time of an input sampling rate change, etc. adjust, when the lock state of PLL changes. Please refer to the recommendation procedure of Chapter 8 and Chapter 11 for details. When there is no margin in the data taking-in position of DSP, the read-out value of &hAA[3] is set to H. & Once hAA [3] is set to H, it will read until it adjusts a data taking-in position or writes 0 in &hAA[3], and a value will not be set to L. www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 55/57 2012.03 - Rev.A Technical Note BU9414FV ●Operational Notes (1) ABSOLUTE MAXIMUM RATINGS Permanent device damage may occur and break mode (open or short) can not be specified if power supply, operating temperature, and those of ABSOLUTE MAXIMUM RATINGS are exceeded. If such a special condition is expected, components for safety such as fuse must be used. (2)Regarding of SCLI and SDAI terminals SCLI and the SDAI terminal do not support 5 V-tolerant. Please use it within absolute maximum rating (4.5V). (3) Power Supply Power and Ground line must be designed as low impedance in the PCB. Print patterns if digital power supply and analog power supply must be separated even if these have same voltage level. Print patterns for ground must be designed as same as power supply. These considerations avoid analog circuits from the digital circuit noise. All pair of power supply and ground must have their own de-coupling capacitor. Those capacitor should be checked about their specification, etc. (nominal electrolytic capacitor degrades its capacity at low temperature) and choose the constant of an electrolytic capacitor. (4) Functionality in the strong electro-magnetic field Malfunction may occur if in the strong electro-magnetic field. (5) Input terminals All LSI contain parasitic components. Some are junctions which normally reverse bias. When these junctions forward bias, currents flows on unwanted path, malfunction or device damage may occur. To prevent this, all input terminal voltage must be between ground and power supply, or in the range of guaranteed value in the Electrical characteristics. And no voltage should be supplied to all input terminal when power is not supplied. www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 56/57 2012.03 - Rev.A Technical Note BU9414FV ●Ordering Information B U 9 4 1 4 Part Number F E2 V Package FV: SSO-B40 Packaging and forming specification E2: Embossed tape and reel ●Physical Dimension Tape and Reel Information SSOP-B40 <Tape and Reel information> 13.6 ± 0.2 (MAX 13.95 include BURR) 0.5 ± 0.2 1 2000pcs Direction of feed E2 The direction is the 1pin of product is at the upper left when you hold ( reel on the left hand and you pull out the tape on the right hand ) 20 0.15 ± 0.1 0.1 1.8 ± 0.1 Embossed carrier tape Quantity 21 5.4 ± 0.2 7.8 ± 0.3 40 Tape 0.1 S 0.65 0.22 ± 0.1 0.08 M 1pin (Unit : mm) Reel Direction of feed ∗ Order quantity needs to be multiple of the minimum quantity. ●Marking Diagram(s)(TOP VIEW) BU9414F Lot No. www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 57/57 2012.03 - Rev.A Datasheet Notice Precaution on using ROHM Products 1. Our Products are designed and manufactured for application in ordinary electronic equipments (such as AV equipment, OA equipment, telecommunication equipment, home electronic appliances, amusement equipment, etc.). If you (Note 1) , transport intend to use our Products in devices requiring extremely high reliability (such as medical equipment equipment, traffic equipment, aircraft/spacecraft, nuclear power controllers, fuel controllers, car equipment including car accessories, safety devices, etc.) and whose malfunction or failure may cause loss of human life, bodily injury or serious damage to property (“Specific Applications”), please consult with the ROHM sales representative in advance. Unless otherwise agreed in writing by ROHM in advance, ROHM shall not be in any way responsible or liable for any damages, expenses or losses incurred by you or third parties arising from the use of any ROHM’s Products for Specific Applications. (Note1) Medical Equipment Classification of the Specific Applications JAPAN USA EU CHINA CLASSⅢ CLASSⅡb CLASSⅢ CLASSⅢ CLASSⅣ CLASSⅢ 2. ROHM designs and manufactures its Products subject to strict quality control system. However, semiconductor products can fail or malfunction at a certain rate. Please be sure to implement, at your own responsibilities, adequate safety measures including but not limited to fail-safe design against the physical injury, damage to any property, which a failure or malfunction of our Products may cause. The following are examples of safety measures: [a] Installation of protection circuits or other protective devices to improve system safety [b] Installation of redundant circuits to reduce the impact of single or multiple circuit failure 3. Our Products are designed and manufactured for use under standard conditions and not under any special or extraordinary environments or conditions, as exemplified below. Accordingly, ROHM shall not be in any way responsible or liable for any damages, expenses or losses arising from the use of any ROHM’s Products under any special or extraordinary environments or conditions. If you intend to use our Products under any special or extraordinary environments or conditions (as exemplified below), your independent verification and confirmation of product performance, reliability, etc, prior to use, must be necessary: [a] Use of our Products in any types of liquid, including water, oils, chemicals, and organic solvents [b] Use of our Products outdoors or in places where the Products are exposed to direct sunlight or dust [c] Use of our Products in places where the Products are exposed to sea wind or corrosive gases, including Cl2, H2S, NH3, SO2, and NO2 [d] Use of our Products in places where the Products are exposed to static electricity or electromagnetic waves [e] Use of our Products in proximity to heat-producing components, plastic cords, or other flammable items [f] Sealing or coating our Products with resin or other coating materials [g] Use of our Products without cleaning residue of flux (even if you use no-clean type fluxes, cleaning residue of flux is recommended); or Washing our Products by using water or water-soluble cleaning agents for cleaning residue after soldering [h] Use of the Products in places subject to dew condensation 4. The Products are not subject to radiation-proof design. 5. Please verify and confirm characteristics of the final or mounted products in using the Products. 6. In particular, if a transient load (a large amount of load applied in a short period of time, such as pulse. is applied, confirmation of performance characteristics after on-board mounting is strongly recommended. Avoid applying power exceeding normal rated power; exceeding the power rating under steady-state loading condition may negatively affect product performance and reliability. 7. De-rate Power Dissipation (Pd) depending on Ambient temperature (Ta). When used in sealed area, confirm the actual ambient temperature. 8. Confirm that operation temperature is within the specified range described in the product specification. 9. ROHM shall not be in any way responsible or liable for failure induced under deviant condition from what is defined in this document. Precaution for Mounting / Circuit board design 1. When a highly active halogenous (chlorine, bromine, etc.) flux is used, the residue of flux may negatively affect product performance and reliability. 2. In principle, the reflow soldering method must be used; if flow soldering method is preferred, please consult with the ROHM representative in advance. For details, please refer to ROHM Mounting specification Notice - GE © 2014 ROHM Co., Ltd. All rights reserved. Rev.002 Datasheet Precautions Regarding Application Examples and External Circuits 1. If change is made to the constant of an external circuit, please allow a sufficient margin considering variations of the characteristics of the Products and external components, including transient characteristics, as well as static characteristics. 2. You agree that application notes, reference designs, and associated data and information contained in this document are presented only as guidance for Products use. Therefore, in case you use such information, you are solely responsible for it and you must exercise your own independent verification and judgment in the use of such information contained in this document. ROHM shall not be in any way responsible or liable for any damages, expenses or losses incurred by you or third parties arising from the use of such information. Precaution for Electrostatic This Product is electrostatic sensitive product, which may be damaged due to electrostatic discharge. Please take proper caution in your manufacturing process and storage so that voltage exceeding the Products maximum rating will not be applied to Products. Please take special care under dry condition (e.g. Grounding of human body / equipment / solder iron, isolation from charged objects, setting of Ionizer, friction prevention and temperature / humidity control). Precaution for Storage / Transportation 1. Product performance and soldered connections may deteriorate if the Products are stored in the places where: [a] the Products are exposed to sea winds or corrosive gases, including Cl2, H2S, NH3, SO2, and NO2 [b] the temperature or humidity exceeds those recommended by ROHM [c] the Products are exposed to direct sunshine or condensation [d] the Products are exposed to high Electrostatic 2. Even under ROHM recommended storage condition, solderability of products out of recommended storage time period may be degraded. It is strongly recommended to confirm solderability before using Products of which storage time is exceeding the recommended storage time period. 3. Store / transport cartons in the correct direction, which is indicated on a carton with a symbol. Otherwise bent leads may occur due to excessive stress applied when dropping of a carton. 4. Use Products within the specified time after opening a humidity barrier bag. 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The information contained in this doc ument is provi ded on an “as is” basis and ROHM does not warrant that all information contained in this document is accurate an d/or error-free. ROHM shall not be in an y way responsible or liable for an y damages, expenses or losses incurred b y you or third parties resulting from inaccur acy or errors of or concerning such information. Notice – WE © 2014 ROHM Co., Ltd. All rights reserved. Rev.001