ROHM BU9409FV Technical data

A

Digital Sound Processors for FPD TVs

32bit Audio DSP

BU9409FV

●General Description

It is a digital audio sound processor used for thin TV. Digital signal processor is Rohm original DSP only for TV sound signal processing, and it’s cost performance is excellent. Digital inputs are two lines. Output is digital output corresponding to 2.1ch or play of sub-voice L/R signal.

●Features

■DSP Part

Data width: 32bit (Data RAM) Quickest machine cycle:40.7ns (512fs,fs=48kHz) Multiplier: 32 x 24 → 56bit Adder: 32 + 32 → 32bit Data RAM: 256 x 32bit Coefficient RAM: 128 x 24bit Sampling frequency: fs=48kHz Master clock: 512fs

（24.576MHz,fs=48kHz）

■Input output I/F

2 stereo digital signal input port : 16/20/24bit (I2S,left-align,right-align) 2 stereo digital signal output port : 16/20/24bit (I2S,left-align,right-align), S/PDIF output

■Sound signal processing function for TV

Prescaler, DC cut HPF, channel mixer, P TREBLE, pseudo stereo, surround, P master volume, L/R balance, postscaler, output clipper, subwoofer output processing

2

（P

Volume，P2Bass，P2Treble are Rohm original sound effect functions.）

●Applications

Flat Panel TVs (LCD, Plasma)

2

Volume(Perfect Pure Volume),BASS,MIDDLE,

2

Bass, P2Treble, 7 band parametric equalizer,

No.12083EAT03

www.rohm.com

1/54

2012.03 - Rev.

BU9409FV

A

Technical Note

●Absolute maximum rating（Ta = 25 ° C）

Item Symbol Rating Unit Power-supply voltage VDD 4.5 V Allowable dissipation Pd 700 (*1) mW operating temperature range T Storage temperature range T

*1 7mW is decreased for 1°C when using it with Ta=25°C or more.

Operation can’t be guaranteed.

-25～+85 °C

opr

-55～+125 °C

stg

●Operating condition（Ta = - 25 ～+85°C）

Item Symbol Rating Unit Power-supply voltage VDD 3.0～3.6 V

* 1 It isn’t Radiation-proof designed for the product.

www.rohm.com

2/54

2012.03 - Rev.

BU9409FV

A

Technical Note

●Electrical Characteristics(Digital serial)

=3.3V unless specified, Ta=25°C

V

DD

Rating value

Unit Terms Adaptive

V

=0～3.3V

IN

Hysteresis

Input voltage

Item Symb

ol H Level voltage VIH 2.5 - - V *1,2,3 L Level voltage VIL - - 0.8 V *1,2,3

Min. Standard Max.

Input current II -1 - +1 µA

Pull-up resistor input L current IIL -150 -100 -50 µA VIN=0V *2

Pull-down resistor input H current IIH 35 70 105 µA VIN=3.3V *3

Output voltage

H Level voltage V L Level voltage VOL - - 0.55 V IO=0.6mA *4

2.75 - - V IO=-0.6mA *4

OH

terminal

*1

SDA terminal Output voltage

L Level voltage V

- - 0.4 V IO=3mA *5

OL

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)

V

=3.3V Unless specified, Ta=25°C,RL=10kΩ, VC standard

DD

Item Symbol

Min Standard Max whole Circuit current IQ - 15 30 mA VDD Regulator part Output voltage V

1.3 1.5 1.7 V IO=100mA

REG

PLL part Lock frequency F

- 24.576 - MHz 256fs(fs=48kHz) input

LK8

Rating Value

Unit Object pin/Condition

www.rohm.com

3/54

2012.03 - Rev.

BU9409FV

A

●Block diagram

Technical Note

BCKI

MCLK

VSS3

39

BCKO

LRCKO

SDATAO1

SYSCLKO

3740 38 36 27

35

SDATAO2

RESETXO

33 32 31 30 29 2834

MUTEX_DACO

MUTEX_SPO

SCLO

CLK

DSP

SP

Conv.

TEST

I2S

IF

2 3 4 5 6 7 8 9 10 11 13 14 15

1

N.C.

LRCKI

SDATA1

SDATA2

RESETX

Control

IF

MUTEX_SP

MUTEX_DAC

I2C

IF

LDO15

12

SCLI

１VSS

SDAI

REG15

DVDDCORE

SDAO

N.C.

2526

24 23 22 21

SPDIFO

N.C.

ADDR

PLLA

16

17 18 19 20

N.C.

VDD

ANATEST

LDOPOFF

N.C.

２VSS

PLLFIL

MODE

www.rohm.com

4/54

2012.03 - Rev.

BU9409FV

A

●Pin Description(s)

No.

Name Description of terminals

1 N.C (*2)

2 LRCKI I2S Audio LR signal input 3 SDATA1 I2S Audio data input 1 4 SDATA2 I2S Audio data input 2 5 RESETX Reset status with “L” 6 MUTEX_SP DAC mute signal input(*1) 7 MUTEX_DAC SP mute signal input(*1) 8 SCLI I2C Forwarding clock input

9 SDAI I2C Data input output 10 VSS1 Digital I/O GND 11 DVDDCORE Connect to REG15 terminal 12 REG15 Built-in regulator voltage output 13 LDOPOFF Built-in regulator POFF signal

input 14 ANATEST Analog test monitor terminal 15 VDD Digital I/O power supply 16 N.C 17 N.C 18 PLLFIL Filter connection terminal for

PLL 19 VSS2 Digital I/O GND 20 MODE Test mode selection input

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.

Type

-

D D D B B B F E

-

G G

G

-

G

A

Technical Note

No.

21 ADDR I2C Slave address selection

22 SPDIFO S/PDIF Signal output 23 N.C 24 N.C 25 N.C 26 N.C 27 N.C 28 SDAO 2 line serial data output（*1） 29 SCLO 2 line serial clock output（*1） 30 MUTEX_DACO DAC mute signal output(*1) 31 MUTEX_SPO SP mute signal output(*1) 32 RESETXO Reset signal output(*1) 33 SDATAO2 I2S Audio data output 2

34 SDATAO1 I2S Audio data output 1 35 LRCKO I2S Audio LR signal output 1 36 BCKO I2S Audio clock output 1 37 SYSCLKO System clock output（*1） 38 VSS3 Digital I/O GND

39 MCLK Master clock input 40 BCKI I2S Audio clock input

Name Description of terminals

terminal

Type

B

C

-

C C C C C C

C C C C

-

H D

www.rohm.com

5/54

2012.03 - Rev.

BU9409FV

A

●Terminal equal circuit figure

A B C

VDD

Technical Note

VDD

VSS

D E F

VDD

VSS

G H

VDD

VSS

VDD

VSS

www.rohm.com

6/54

2012.03 - Rev.

BU9409FV

A

1.Command interface

I2C bus method is used in command interface with host CPU on BU9409FV.

In BU9409FV, not only writing but read-out is possible except for some registers.

Besides the slave address in BU9409FV, one byte select address can be Specified, written and readout.

2

The format of I

MSB LSB MSB LSB MSB LSB

S Slave Address A Select Address A Data 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,

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 BU9409FV. (MSB first)

Data: Data-byte, data(MSB first)sent and received

P: Stop Condition

SDA

SCL

11--11.. DDaattaa wwrriittiinngg

S Slave Address A Select Address A Data A P

: From master to slave : From slave to master

ADDR=0 MSB LSB

A6 A5 A4 A3 A2 A1 A0 R/W

1 0 0 0 0 0 0 0

ADDR=1 MSB LSB

A6 A5 A4 A3 A2 A1 A0 R/W

1 0 0 0 0 0 1 0

S Slave Address

(example) 80h 20h 00h 00h 00h : From master to slave : From slave to master

C bus slave mode is shown below.

the data of eight bits in total will be sent. (MSB first)

MSB 6 5 LSB

Start Condition

↓When SDA , SCL=”H”

Select Address A Data A Data A Data A P

Stop Condition

↑When SDA , SCL=”H”

Setting of BU9409FV slave address

Terminal setting Write-mode

ADDR

0 80h 1 82h

Technical Note

Slave-address

www.rohm.com

7/54

2012.03 - Rev.

BU9409FV

A

Writing procedure

Step Clock Master Slave(BU9409FV) Note

1 Start Condition

2 7 Slave Address

3 1 R/W (0)

4 1 Acknowledge

5 8 Select Address Writing object register 8 bit

6 1 Acknowledge

7 8 Data Writing data 8 bit

8 1 Acknowledge

9 Stop Condition

- The select address add +1 by auto increment function when the data is transferred continuously. Repeat of Step 7~8.

11--22.. DDaattaa rreeaaddoouutt

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 A Req_Addr A Select Address A P

（example） 80h D0h 20h

S Slave Address A Data 1 A Data 2 A A Data N Ā P

（example） 81h **h **h **h ： Master to slave，： Slave to master， A：With acknowledge， Ā：without acknowledge

Readout Procedure

Step Clock Master Slave(BU9409FV) Note

1 Start Condition

2 7 Slave Address

3 1 R/W (0)

4 1 Acknowledge

5 8 Req_Addr Address for I2C readout &hD0

6 1 Acknowledge

7 8 Select Address Readout object register 8 bit

8 1 Acknowledge

9 1 Stop Condition

10 1 Start Condition

11 7 Slave Address

12 1 R/W (1)

13 1 Acknowledge

14 8 Data Readout data 8 bit

15 1 Acknowledge

16 Stop Condition

○ The select address adds +1 by auto increment function when continuous data is transferred. Repeat Step14~15.

&h80 (&h82)

&h81 (&h82)

Technical Note

www.rohm.com

8/54

2012.03 - Rev.

BU9409FV

A

Technical Note

11--33.. CCoonnttrrooll ssiiggnnaall ssppeecciiffiiccaattiioonn

○ Bus line, I/O stage electrical specification and timing.

SDAI

t

BUF

t

LOW

t

R

F

t

HD;STA

SCLI

t

HD;STA

SP

t

HD;DAT

t

HIGH

t

SU;DATtSU;STA

t

SU;STO

Sr

Fig.1-1: Timing chart

Table 1-1: SDAI and SCLI bus-line characteristic (Unless specified, Ta=25, Vcc=3.3V)

Parameter Code

High-speed mode

Min. Max.

Unit

1 SCLI clock frequency fSCL 0 400 kHz

Bus-free-time between "Stop" condition and "Start"

2

condition

"Start" condition of hold-time (resending). After this period,

3

the first clock-pulse is generated.

4 LOW status hold-time of SCLI clock

5 HIGH status hold-time of SCLI clock

6 Setup time of resending “Start” condition

7 Data-hold-time

8 Data-setup time

9 Rising time of SDAI and SCL signal

10 Fall time of SDAI and SCL signal

11 Setup time of "Stop" condition

t

BUF 1.3 － μs

t

HD;STA 0.6 － μs

t

LOW 1.3 － μs

t

HIGH 0.6 － μs

t

SU;STA 0.6 － μs

t

HD;DAT 01) － μs

t

SU;DAT

t

R 20+Cb 300 ns

t

F 20+Cb 300 ns

t

SU;STO 0.6 － μs

500/250/15

0

－ ns

12 Capacitive load of each bus-line Cb － 400 pF

The above-mentioned numerical values are all the values corresponding to V

IH min

and V

IL 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(V

of SCLI signal).

IH min

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.

P

www.rohm.com

9/54

2012.03 - Rev.

BU9409FV

A

Technical Note

2.Switching of data and clock

I/O system chart of BU9409FV audio data is shown below.

Digital input1

Digital input2

SEL1

SDATA1

SDATA2

Audio DSP (BU9409FV)

S-P

conversi

on1

S-P

conversi

on2

DSP CLK (512fs)

DSP operation part This part is performanced by hardware.

Main Main

Bass

Func.

Main

PLLA

mclk_

P-EQ

div

MCLK

SEL3

Sub

Treble

plla_

div

SYSCLKO

(256fs)

EVR

I2C

Sub

Control I/F

RESET

SEL2

MODE

Convers

・・・

ADDR

P-S

SDATAO1(Main)

ion1

P-S

SDATAO2(Sub)

ion2

P-S

ion3

SPDIFO

D Class amp output

(Sub Woofer)

Optical output

BU9409FV has 2 digital stereo input and 3 digital stereo output with the same sampling rate.

Output from DSP operation part is converted into I

2

S 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.

22--11.. SS--PP ccoonnvveerrssiioonn11 iinnppuutt ddaattaa sseelleeccttiioonn((SSEELL11))

Default = 0

Select Address Value Operating Description

&h03 [ 0 ]

0 Input data from SDATA1

1 Input data from SDATA2

22--22.. SS--PP ccoonnvveerrssiioonn22 iinnppuutt ddaattaa sseelleeccttiioonn((SSEELL11))

Default = 0

Select Address Value Operating Description

&h03 [ 4 ]

0 Input data from SDATA1

1 Input data from SDATA2

22--33.. OOuuttppuutt ddaattaa sseelleeccttiioonn((SSEELL22)) ttoo PP--SS ccoonnvveerrssiioonn11 ((SSDDAATTAAOO11 TTeerrmmiinnaall))

Default = 0

Select Address Value Operating Description

&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.

(Main SP)

www.rohm.com

10/54

2012.03 - Rev.

BU9409FV

A

Technical Note

22--44.. OOuuttppuutt ddaattaa sseelleeccttiioonn((SSEELL22)) ttoo PP--SS ccoonnvveerrssiioonn22 ((SSDDAATTAAOO22 TTeerrmmiinnaall))

Default = 0

Select Address Value Operating Description

&h04 [ 5：4 ]

22--55.. SSPPDDIIFFOO TTeerrmmiinnaall oouuttppuutt ddaattaa sseelleeccttiioonn（（SSEELL22））

Default = 0

Select Address Value Operatin

&h05 [ 1：0 ]

22--66.. SSyysstteemm cclloocckk sseelleeccttiioonn（（SSEELL33））

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 Operating Description

&h08 [ 5：4 ]

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 BU9409. 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.

Dividing frequency ratio setting of PLL block which corresponding to input clock from terminal MCLK

22--77..

Sampling rate of input clock Setting of mclk_div

512fs（24.576MHz、fs=48kHz） 256fs（12.288MHz、fs=48kHz）

128fs（6.144MHz、fs=48kHz）

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.

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.

0 Chose the input from a MCLK terminal as a clock.

1 Chose the PLL output as a clock.

2

Chose the input from a SDATA2terminal as a clock. (used for IC test).

3

&hF3

10h 01h 23h

08h 01h 23h

04h 01h 23h

Setting of pll_div

&hF5

g Description

PLL initialization

&hF6

www.rohm.com

11/54

2012.03 - Rev.

BU9409FV

A

Technical Note

3. S-P Conversion 1, S-P Conversion 2

BU9409FV 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

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 31 32 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 31 32

BCKI

MSB LSB

S

DATAI

16bit

MSB LSB

S

16bit

20bit

24bit

20bit

24bit

Left-justified method

左詰方式

LRCKI

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 31 32 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 31 32

BCKI

MSB L SB

S

DATAI

16bit

20bit

24bit

MSB L SB

S

16bit

20bit

24bit

Right-justified method

右詰方式

LRCKI

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 31 32 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 31 32

BCKI

DATAI

MSB LSB

S

16bit

20bit

24bit

MSB LSB

S

16bit

20bit

24bit

48fs

LRCKO

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

BCKO

DATAO

MSB LSB

S

16bit

20bit

24bit

MSB L SB

S

16bit

20bit

24bit

www.rohm.com

12/54

2012.03 - Rev.

BU9409FV

A

Technical Note

33--11.. TThhrreeee--wwiirree sseerriiaall iinnppuutt’’ss bbiitt cclloocckk ffrreeqquueennccyy sseettttiinngg

Default = 0

Select Address Value Operational explanation

S-P conversion1, S-Pconversion2

&h0B [ 4 ]

33--22.. TThhrreeee--wwiirree sseerriiaall iinnppuutt’’ss ffoorrmmaatt sseettttiinngg

Default = 0

Select Address Value Operational explanation

S-P conversion1 &h0B

S-P conversion2 &h0C

33--33.. TThhrreeee--wwiirree sseerriiaall iinnppuutt’’ss ddaattaa bbiitt wwiiddtthh sseettttiinngg

Default =

S-P conversion1 &h0B

S-P conversion2 &h0C

0

Select Address Value Operational explanation

[ 3：2 ]

[ 1：0 ]

0 64fs method

1 48fs method

0 IIS method

1 left-justified method

2 right-justified method

0 16 bit

1 20 bit

2 24 bit

www.rohm.com

13/54

2012.03 - Rev.

BU9409FV

A

Technical Note

4. Digital sound processing（DSP）

BU9409FV’s Digital Sound Processing（DSP） consists of special hardware most suitable to Thin TV. BU9409FV uses this special DSP to perform the following processing. Prescaler, DC Cut HPF, Channel Mixer, P

2

Volume（Perfect Pure Volume）, BASS, MIDDLE, TREBLE,

Pseudo Stereo, Surround, P2Bass, P2Treble, 7 Band・Parametric Equalizer, Master Volume, L/R Balance, PostScaler, Output Clipper、 Sub-woofer output Processing.

DDSSPP OOuuttlliinnee aanndd SSiiggnnaall FFllooww

Data width： 32 bit （DATA RAM） Machine cycle： 40.7ns （512fs, fs=48kHz） Multiplier： 32×24 → 56 bit Adder： 32＋32 Data RAM： 256×32 bit

→ 32 bit

MUX

Data

Input

RAM

MUX

0

M U X

Coefficient RAM： 128×24 bit Sampling frequency： fs=48kHz Master clock： 512fs （24.576MHz, fs=48kHz）

ADD

Acc

Digital signal from 16bit to 24bit is inputted to DSP,

Output

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.

Input1

Input2

Pre

scaler

HPF

Channel

mixer

Digital Audio Processing Signal Flow

P2Volume

BASS

MIDDLE

TREBLE

Scaler

Pseude

stereo

1

surround

＆

P2Bass P2Treble

Channel

mixer

Scaler

LPF

7Band P-EQ

2

3band P-EQ

EVR

＆

Blance

EVR

＆

Balance

Post

scaler

＆

Clipper

Post

scaler

＆

Clipper

44--11.. PPrreessccaalleerr

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

&h20 [ 7：0 ]

command gain

00 01 +23.5dB

30 31

32

……

FE FF

+24dB

0dB

-0.5dB

-1dB

-103dB

-∞

……

Coefficient

operation

Circuit

Coefficient

RAM

Decoder

circuit

Main output

Sub output

www.rohm.com

14/54

2012.03 - Rev.

BU9409FV

A

Technical Note

44--22.. DDCC CCuutt HHPPFF

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

44--33.. CChhaannnneell mmiixxeerr

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

The data inputted to Rch of DSP is mixed.

Default = 0

Select Address Value Operational explanation

&h21 [ 0 ]

Select Address Value Operational explanation

&h22 [ 7：6 ]

Select Address Value Operational explanation

&h22 [ 5：4 ]

0 Not using the DC Cut HPF

1 Using the DC Cut HPF

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

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

15/54

2012.03 - Rev.

BU9409FV

A

2

44--44.. P

P

VVoolluummee （（PPeerrffeecctt PPuurree VVoolluummee））

There are some scenes in which sound suddenly becomes large like plosive sound in TV Commercial or Movie.

2

Volume function automatically controls the volume and adjusts the output level.

P

In addition, it also adjusts in such a way that a whispery sound can be heard easily.

2

Volume function operates in the fields of (1), (2) & (3) divided according to input level.

P

(1) at the time of V

inf

Ｉ

(-∞)～V

Noise is prevented from being lifted by P

(2) When input level is over V V

= VI + α

O

α： Lifting the Whole output level by the offset value α (3) When output level Ｖ

V

Ｏ

= K・VI + α

O

min

Ｉ

and output is below V

min

Ｉ

exceeds V

Omax

2

Volume function.

Omax

V

O

V

Omax

P2V_MAX

(2)

K： Slope for suppressing of D range （P2V_K）

It is also possible to set an output level constant.

2

Selection of using the P

Default = 0

Volume function.

V

Omin

α

V

Oinf

(1)

V

Iinf

Imin

P2V_MIN

Select Address Value Operational explanation

&h33 [ 7 ]

0 Not using the P2Volume function

1 Using the P2Volume function

Setting of V

In order to cancel that noise etc. is lifted by P

2

Volume functions.

P

Default = 00h

min

Ｉ

2

Volume, the P2V_MIN sets the minimum level at which (to the minimum) the

command

Select Address Operational explanation

&h34 [ 4:0 ]

command gain

00 -∞ 01 02 03 04 05 06 07

-30dB

-32dB

-34dB

-36dB

-38dB

-40dB

-42dB

command gain

-44dB

08 09

-46dB

0A

-48dB

-50dB

0B 0C

-52dB

0D

-54dB

0E

-56dB

0F

-58dB

command gain

-60dB

10 11

-62dB

12

-64dB

-66dB

13 14

-68dB

15

-70dB

16

-72dB

17

-74dB

コマンド値ゲイン

-76dB

18 19

-78dB

1A

-80dB

-82dB

1B 1C

-84dB

1D

-86dB

1E

-88dB

1F

-90dB

Technical Note

K

(3)

0dB

P2V off

V

I

Setting of V

max

Ｏ

P2V_MAX sets the output suppression level. It represents the output level V case of setting of P2V_K = “0h”（slope is 0）.

Default = 00h

Select Address Operational explanation

&h35 [ 4:0 ]

www.rohm.com

command gain

00 0dB 01

-1dB

-2dB

02

-3dB

03 04

-4dB

05

-5dB

06

-6dB

07

-7dB

16/54

command gain

08

-8dB

09

-9dB

-10dB

0A

-11dB

0B 0C

-12dB

0D

-13dB

0E

-14dB

0F

-15dB

at the time of input level VI = 0dB in the

max

Ｏ

command gain

10 11 12 13 14 15 16 17

-16dB

-17dB

-18dB

-19dB

-20dB

-21dB

-22dB

-23dB

command gain

18

-24dB

19

-25dB

-26dB

1A

-27dB

1B 1C

-28dB

1D

-29dB

1E

-30dB

1F

-

2012.03 - Rev.

BU9409FV

A

Setting of K P2V_K sets the slop of D range. It sets the P2V_MAX = “1Eh”（-30dB） and represents the output level V

input level V

= 0dB.

I

Default = 00h

Select Address Operational explanation

&h36 [ 3:0 ]

command gain

0 -30dB 1

-28dB

-26dB

2

-24dB

3 4

-22dB

5

-20dB

6

-18dB

7

-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 Operational explanation

&h37 [ 4:0 ]

command gain

00 0dB 01 02 03 04 05 06 07

+1dB +2dB +3dB +4dB +5dB +6dB +7dB

command gain

08 09 0A 0B 0C 0D 0E 0F

+8dB

+9dB +10dB +11dB +12dB +13dB +14dB +15dB

command gain

10

+16dB

11

+17dB +18dB

12

+19dB

13 14

+20dB

15

+21dB

16

+22dB

17

+23dB

Setting 1 of transition time at the time of attack

2

A_RATE is the setting of transition time when the state of P

Default = 0

Volume function is transited to (2)→(3).

Select Address Operational explanation

&h38 [ 6:4 ]

command A_RATE time

0 1ms 1 2ms 2 3

3ms 4ms

command

4 5 6 7

A_RATE time

10ms 20ms 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

Default = 0h

Volume function is transited to (3)→(2).

Select Address Operational explanation

&h38 [ 3:0 ]

command R_RATE time

0 0.25s 1 2 3 4 5 6 7

0.5s

0.75s 1s

1.25s

1.5s 2s

2.5s

command

8 9 A B C D E F

R_RATE time

3s 4s 5s 6s 7s 8s 9s

10s

Technical Note

max

Ｏ

command gain

18 19 1A 1B 1C 1D 1E 1F

5ms

at the time of

+24dB

-

www.rohm.com

17/54

2012.03 - Rev.

BU9409FV

A

Technical Note

Explanation of A_RATE,R_RATE(field transition of (2)<->(3))

Input

V

I

Time

T

Field (2) Field (2)Field (3)

V

Omax

Output

V

O

Time

T

Attack operation

A_RATE

The time from exceeding the attack operation detection level V

till the attack operation's

Ｏmax

transition to Field (3) is completed

Recovery operation

R_RATE

The time from falling below the recovery operation detection level V operation's transition to Field

(2) is completed

till the recovery

Ｏmax

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)→(3) continues for more then A_TIME time in succession, then the state transition of P

Default = 0

Select Address Operational explanation

&h39 [ 6:4 ]

command A_TIME

command 0 0.5ms 1 1ms 2 3

Setting 1 of recovery detection time

2

R_TIME is the setting of the initiation of P (3)→(2) continues for more then R_TIME time in succession, then the state transition of P

Default = 0

Select Address Operational explanation

&h39 [ 2:0 ]

Volume function’s transition operation. If output level at the time of transiting to

command R_TIME

1.5ms 2ms

command 0 50ms 1 100ms 2 3

150ms 200ms

2

Volume is started.

A_TIME 4 5 6 7

2

Volume is started.

3ms 4ms 5ms 6ms

4 5 6 7

R_TIME

300ms 400ms 500ms 600ms

www.rohm.com

18/54

2012.03 - Rev.

BU9409FV

A

Explanation of A_RATE_Low,R_RATE_Low(field transition of (1)<->(2))

Technical Note

V

Imin

Input

V

I

Tme T

Field (1) Field (1)Field (2)

V

Omin

Output

V

O

Time T

Recovery operation

R_RATE_Low

The time from falling below the recovery operation detection level V

till the recovery

Imin

operation's transition to Field (2) is completed

Attack operation

A_RATE_Low

The time from exceeding the attack operation detection level V attack operation's transition to Field (1) is completed

Imin

till the

Setting 2 of the transition time at the time of attack

A_RATE_LOW is the setting of transition time when the state of P

Default = 0

2

Volume function is transited to (2)→(1).

Select Address Operational explanation

Command

0 1ms

&h3A [ 6:4 ]

1 2ms 2 3

Setting 2 of the transition time at the time of recovery R_RATE_LOW is the setting of transition time when the state of P

Default = 0 (Caution) This setting value is not reflected in BU9409FV. The value of &h38 [3:0] is set up.

A_RATE_LOW Time

Command

A_RATE_LOW Time

4

5 3ms 4ms

2

Volume function is transited to (1)→(2).

6

7

Select Address Operational explanation

&h3A [ 2:0 ]

Setting 2 of attack・recovery detection time AR_TIME_LOW is the setting of the initiation of P

Command

0 1ms 1 2ms 2 3

2

Volume function’s transition operation. If output level at the time of

R_RATE_LOW Time

3ms 4ms

Command

4 5 6 7

R_RATE_LOW Time

transiting to (1)<->(2) continues for more then AR_TIME time in succession, then the state transition of P

Default = 0

Select Address Operational explanation

&h3B [ 6:4 ]

Command

0 0.5ms 1 1ms 2 3

AR_TIME_LOW

1.5ms 2ms

Command

4 5 6 7

AR_TIME_LOW

3ms 4ms 5ms 6ms

5ms 10ms 20ms 40ms

2

Volume is started.

www.rohm.com

19/54

2012.03 - Rev.

BU9409FV

A

○Pulse sound detection and High-speed recovery function（functioning only at the time of transition of (2)<->(3)）

2

Volume function makes the P2Volume also compatible with large pulse sounds (clapping of hands, fireworks & shooting

P

2

etc.) in addition to normal P

operation (R_RATE) is performed at 4 or 8 times the speed of normal attack operation or recovery operation.

Selection of using the pulse sound detection function.

Default = 0

Select Address Value Operational explanation

&h3BC[ 7 ]

Selection of operating times of Recovery Time (R_RATE) in the case of using the pulse sound detection function

Default = 0

Select Address Value Operational explanation

&h3C [ 3 ]

Selection of pulse sound detection time

Default = 0

Select Address Operational explanation

&h3C [ 6:4 ]

Setting of operating level of pulse sound detection function

Operation is started by the difference between the presently detected value and the last value as a standard.

Default = 0

Select Address Operational explanation

&h3C [ 2:0 ]

Example） Present detection level A ： -10dB → 10^(-10/20) = 0.32 The last detection level B ： -30dB → 10^(-30/20) = 0.032 A – B ： 0.32 – 0.032 = 0.288 → Operating by the setting of command ”4” to ”7”.

Volume operation. When large pulse sound is inputted, attack operation (A_RATE) or recovery

0 Not using of pulse sound detection function

1 Using of pulse sound detection function

0

1

Operating at 4 times the speed corresponding to the setting time of R_RATE Operating at 8 times the speed corresponding to the setting time of R_RATE

Command

Detection time

0 100us 1 200us 2 3

400us

1ms

Detection level

0 Over 1.002 1 Over 0.709 2 3

Over 0.502 Over 0.355

Command

4 5 6 7

Command

Detection time

4 5 6 7

Technical Note

2ms

5ms 10ms 20ms

Detection level

Over 0.251 Over 0.178 Over 0.126 Over 0.089

www.rohm.com

20/54

2012.03 - Rev.

BU9409FV

A

Technical Note

44--55.. BBAASSSS

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 F

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

Selection of smooth transition function

Selection of smooth transition time

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.

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.

Default = 0

Select Address Value Operational explanation

Default = 0

Select Address Value Operational explanation

Default = 0

Select Address Value Operational explanation

Default = 0

Select Address Value Operational explanation

&h40 [ 7 ]

&h40 [ 6 ]

&h40 [ 5:4 ]

&h4C [ 0 ]

0 Peaking filter

1 Low-shelf filter

0 Using BASS smooth transition function

1 Not BASS using smooth transition function

0 21.4ms

1 10.7ms

2 5.4ms

3 2.7ms

0 BASS smooth transition stop

1 BASS smooth transition start

，Q and Gain, and

0

www.rohm.com

21/54

2012.03 - Rev.

BU9409FV

A

Technical Note

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（F

Default = 0Eh

0

）

Select Address Operational explanation

&h41 [ 5:0 ]

Command

00 01 02 03 04 05 06 07

Frequency

20Hz 22Hz 25Hz 28Hz 32Hz 35Hz 40Hz 45Hz

Command

08

09 0A 0B 0C 0D

0E

0F

Frequency

50Hz 56Hz 63Hz 70Hz 80Hz

90Hz 100Hz 110Hz

Command

10 11 12 13 14 15 16 17

Frequency

125Hz 140Hz 160Hz 180Hz 200Hz 220Hz 250Hz 280Hz

Command

18 19 1A 1B 1C 1D 1E 1F

Frequency

315Hz 350Hz 400Hz 450Hz 500Hz 560Hz 630Hz 700Hz

Command

20 21 22 23 24 25 26 27

Frequency

800Hz 900Hz

1kHz

1.1kHz

1.25kHz

1.4kHz

1.6kHz

1.8kHz

Command

28

29 2A 2B 2C 2D

2E

2F

Frequency

2kHz

2.2kHz

2.5kHz

2.8kHz

3.15kHz

3.5kHz 4kHz

4.5kHz

Command

30 31 32 33 34 35 36 37

Frequency

5kHz

5.6kHz

6.3kHz 7kHz 8kHz 9kHz

10kHz 11kHz

Command

Frequency

12.5kHz

38 39

14kHz 16kHz

3A 3B

18kHz 20kHz

3C 3D

-

3E 3F

-

Selection of quality factor （Q）

Default = 4h

Select Address Operational explanation

&h42 [ 3:0 ]

Command

Quality factor

0 1 2 3 4 5 6 7

0.33

0.43

0.56

0.75

1.0

1.2

1.5

1.8

Selection of Gain

Default = 40h

Select Address Operational explanation

&h43 [ 6:0 ]

Command Gain

1C -18dB

…

3E -1dB 3F

40 41

…

64

If the coefficient of b0, b1, b2, a1, and a2 exceeds ±4, it may not operate normally.

Command

8 9 A B C D E F

…

-0.5dB 0dB

+0.5dB

+1dB42

…

+18dB

Quality factor

2.2

2.7

3.3

3.9

4.7

5.6

6.8

8.2

www.rohm.com

22/54

2012.03 - Rev.

BU9409FV

A

Technical Note

44--66.. MMIIDDDDLLEE

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

Selection of smooth transition time

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.

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 Operational explanation

Default = 0

Select Address Value Operational explanation

Default = 0

Select Address Value Operational explanation

Default = 0

Select Address Value Operational explanation

&h44 [ 6 ]

&h44 [ 5:4 ]

&h4C [ 1 ]

&h44 [ 0 ]

0 Using MIDDLE smooth transition function

1 Not MIDDLE using smooth transition function

0 21.4ms

1 10.7ms

2 5.4ms

3 2.7ms

0 MIDDLE smooth transition stop

1 MIDDLE smooth transition start

0 MIDDLE coefficient transmission stop

1 MIDDLE coefficient transmission sart

www.rohm.com

23/54

2012.03 - Rev.

BU9409FV

A

Selection of frequency（F0）

Default = 0Eh

Select Address Operational explanation

&h45 [ 5:0 ]

Selection of quality factor（Q）

Default = 4h

Select Address Operational explanation

&h46 [ 3:0 ]

Selection of Gain

Default = 40h

Select Address Operational explanation

&h47 [ 6:0 ]

If the coefficient of b0, b1, b2, a1, and a2 exceeds ±4, it may not operate normally.

Command

00 01 02 03 04 05 06 07

Frequency

20Hz 22Hz 25Hz 28Hz 32Hz 35Hz 40Hz 45Hz

Command

08 09 0A 0B 0C 0D 0E 0F

Frequency

50Hz 56Hz 63Hz 70Hz 80Hz

90Hz 100Hz 110Hz

Command

10 11 12 13 14 15 16 17

Frequency

125Hz 140Hz 160Hz 180Hz 200Hz 220Hz 250Hz 280Hz

Command

18 19 1A 1B 1C 1D 1E 1F

Command

0 1 2 3 4 5 6 7

Frequency

315Hz 350Hz 400Hz 450Hz 500Hz 560Hz 630Hz 700Hz

Quality factor

Command

20 21 22 23 24 25 26 27

Frequency

800Hz 900Hz

1kHz

1.1kHz

1.25kHz

1.4kHz

1.6kHz

1.8kHz

Command

0.33

0.43

0.56

0.75

1.0

1.2

1.5

1.8

Command Gain

1C -18dB

…

3E -1dB 3F 40 41

…

64

8

9 A B C D E F

Command

…

-0.5dB 0dB

+0.5dB

+1dB42

…

+18dB

Frequency

28 29

2.2kHz

2.5kHz

2A 2B

2.8kHz

3.15kHz

2C 2D

3.5kHz 2E 2F

4.5kHz

Quality factor

2.2

2.7

3.3

3.9

4.7

5.6

6.8

8.2

Technical Note

Command

2kHz

30 31 32 33 34 35

4kHz

36 37

Frequency

5kHz

5.6kHz

6.3kHz 7kHz 8kHz 9kHz

10kHz 11kHz

Command

38 39 3A

3B 3C 3D 3E 3F

Frequency

12.5kHz 14kHz 16kHz 18kHz 20kHz

-

www.rohm.com

24/54

2012.03 - Rev.

BU9409FV

A

Technical Note

44--77.. TTRREEBBLLEE

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 F

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

Selection of smooth transition function

Selection of smooth transition time

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.

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.

，Q and Gain, and

0

Default = 0

Select Address Value Operational explanation

&h48 [ 7 ]

Default = 0

Select Address Value Operational explanation

&h48 [ 6 ]

Default = 0

Select Address Value Operational explanation

&h48 [ 5:4 ]

Default = 0

Select Address Value Operational explanation

&h4C [ 2 ]

What is necessary is the time of waiting, which is more than the time selected by the setting of TREBLE smooth

0 Peaking filter

1 High-shelf filter

0 Using smooth transition function

1 Not using smooth transition function

0 21.4ms

1 10.7ms

2 5.4ms

3 2.7ms

0 TREBLE smooth transition stop

1 TREBLE smooth transition start

www.rohm.com

25/54

2012.03 - Rev.

BU9409FV

A

Technical Note

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 Operational explanation

&h48 [ 0 ]

0 TREBLE coefficient transmission stop

1 TREBLE coefficient transmission start

Selection of frequency（F

Default = 0Eh

Select

）

0

Operational explanation

Address

&h49 [ 5:0 ]

Command

00 01 02 03 04 05 06 07

Frequency

20Hz 22Hz 25Hz 28Hz 32Hz 35Hz 40Hz 45Hz

Command

08 09 0A 0B 0C 0D 0E 0F

Frequency

50Hz 56Hz 63Hz 70Hz 80Hz

90Hz 100Hz 110Hz

Command

10 11 12 13 14 15 16 17

Frequency

125Hz 140Hz 160Hz 180Hz 200Hz 220Hz 250Hz 280Hz

Command

18 19 1A 1B 1C 1D 1E 1F

Frequency

315Hz 350Hz 400Hz 450Hz 500Hz 560Hz 630Hz 700Hz

Command

20 21 22 23 24 25 26 27

Frequency

800Hz 900Hz

1kHz

1.1kHz

1.25kHz

1.4kHz

1.6kHz

1.8kHz

Command

28

29 2A 2B 2C 2D 2E

2F

Frequency

2kHz

2.2kHz

2.5kHz

2.8kHz

3.15kHz

3.5kHz 4kHz

4.5kHz

Command

30 31 32 33 34 35 36 37

Frequency

5kHz

5.6kHz

6.3kHz 7kHz 8kHz 9kHz

10kHz 11kHz

Command

38

39 3A 3B 3C 3D 3E 3F

Selection of quality factor（Q）

Default = 4h

Select Address Operational explanation

&h4A [ 3:0 ]

Command

Quality factor

0 1 2 3

0.33

0.43

0.56

0.75 4 5 6 7

Command

1.0

1.2

1.5

1.8

Quality factor

8

9 A B C D E

F

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 Gain

1C -18dB

…

3E -1dB

3F 40 41

…

64

-0.5dB 0dB

+0.5dB

+1dB42

…

+18dB

If the coefficient of b0, b1, b2, a1, and a2 exceeds ±4, it may not operate normally.

Frequency

12.5kHz 14kHz 16kHz 18kHz 20kHz

-

www.rohm.com

26/54

2012.03 - Rev.

BU9409FV

A

Technical Note

44--88.. SSccaalleerr 11

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

&h24 [ 7：0 ]

Command Gain

00 01 +23.5dB

30 31 32

……

FE FF

+24dB

0dB

-0.5dB

-1dB

……

-103dB

-∞

44--99.. PPsseeuuddoo sstteerreeoo

The sense of stereo is reproduced by signal processing of monaural voice.

Selection of filter effects of pseudo stereo

Default = 0

Select Address Value Operational explanation

&h71 [ 1：0 ]

0 Not using of pseudo stereo

1 Gain is set as "high"

2 Gain is set as "low"

If combined with the Surround’s setting of ON（&h70[7] = 1）, it will become even wider.

Lch

Lch PHASE

SHIFTER

Rch PHASE

SHIFTER

EFFECT

GAIN

(High/Low/

）OFF

EFFECT

GAIN

(High/Low/

）OFF

Lch

44--1100.. SSuurrrroouunndd （（MMaattrriixx SSuurrrroouunndd ３３DD））

Rch Rch

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

Loop

+

Lch

+

L-R

-

+

PHASE

SHIFTER

EFFECT

GAIN

LPF

-

www.rohm.com

Rch

27/54

+

Rch

2012.03 - Rev.

BU9409FV

A

ON/OFF of Surround function

Default = 0

Select Address Value Operational explanation

&h70 [ 7 ]

Setting of using the LOOP

Default = 0

Select Address Value Operational explanation

&h70 [ 5 ]

Setting of Surround gain

Default = Fh

Select Address Operational explanation

&h70 [ 3：0 ]

Technical Note

0 Turning the Surround effect OFF

1 Turning the Surround effect ON

0 Not using of LOOP

1 Using of LOOP

Command

00dB 1 2 3 4 5 6 7

Gain

-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

www.rohm.com

28/54

2012.03 - Rev.

BU9409FV

A

V

d

2

P

44--1111.. P

BBaassss （（PPeerrffeecctt PPuurree BBaassss：： DDeeeepp BBaassss EEqquuaalliizzeerr））

Technical Note

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

ocal ban

P2Bass gain

P2Bassゲイン

ボーカル帯域

f

LPF Cutoff frequency

ON/OFF

2

Bass function

of P

Default = 0

HPF Cutoff frequency

HPFカットオフ周波数

LPFカットオフ周波数

Select Address Value Operational explanation

&h73 [ 7 ]

0 Not using of P2Bass function

1 Using of P2Bass function

2

Setting of P

Bass smooth transition time

Default = 0

Select Address Value Operational explanation

&h73 [ 3：2 ]

0 21.4ms

1 10.7ms

2 5.4ms

3 2.7ms

2

Bass smooth transition control

P

Default = 0

Select Address Value Operational explanation

&h77 [ 1：0 ]

0 P2Bass smooth transition stop

1 Setting of the values into Coefficient RAM for P2Bass smooth transition

2 P2Bass smooth transition start

2

What is necessary is the time of waiting, which is more than the time selected by the setting of P

2

time, from the time the P

Please make sure to perform the P

Bass smooth transition start（&h77[1:0] = “2”） is executed until the following command is sent.

2

Bass smooth transition stop（&h77[1:0] = “0”） after the smooth transition is completed.

Bass smooth transition

www.rohm.com

29/54

2012.03 - Rev.

BU9409FV

A

Setting of P2Bass deep bass gain

Default = 00h

Select Address Operational explanation

&h74 [ 7：4 ]

Command Gain

0 0dB 1 2 3 4 5 6 7

+1dB +2dB +3dB +4dB +5dB +6dB +7dB

Command

8

9 A B C D

E

F

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 LPF cutoff frequency

Default = 0

Select Address Value Operational explanation

&h74 [ 1：0 ]

0 120Hz

1 160Hz

2 200Hz

3 240Hz

ON/OFF of pseudo bass function

It can contribute to bass emphasis effect caused by pseudo bass. And it can also be used independently.

Default = 0

Select Address Value Operational explanation

&h72 [ 7 ]

0 Not using of pseudo bass function

1 Using of pseudo bass function

Setting of pseudo bass gain

Default = 00h

Select Address Operational explanation

&h72 [ 6：4 ]

Command Gain

0 -4dB 1 -2dB 2 3

0dB

+2dB

Command

4 5 6 7

Technical Note

Gain +8dB +9dB

+10dB +11dB +12dB +13dB +14dB +15dB

Gain +4dB +6dB +8dB

+10dB

www.rohm.com

30/54

2012.03 - Rev.

BU9409FV

A

2

P

44--1122.. P

TTrreebbllee （（PPeerrffeecctt PPuurree TTrreebbllee：：MMeeddiiuumm・・HHiigghh--bbaanndd eeqquuaalliizzeerr））

Technical Note

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 Value Operational explanation

&h75 [ 7 ]

0 Not using of P2Treble function

1 Using of P2Treble function

2

Setting of P

Treble smooth transition time

Default = 0

Select Address Value Operational explanation

&h75 [ 3：2 ]

0 21.4ms

1 10.7ms

2 5.4ms

3 2.7ms

2

Treble smooth transition control

P

Default = 0

Select Address Value Operational explanation

&h78 [ 1：0 ]

0 P2Treble smooth transition stop

1

Setting of the values into Coefficient RAM for P transition

2

Treble smooth

2 P2Treble smooth transitionＳtart

2

What is necessary is the time of waiting, which is more than the time selected by the setting of P

2

time, from the time the P

Please make sure to perform the P

Treble smooth transition start（&h78[1:0] = “2”） is executed until the following command is sent.

2

Treble smooth transition stop（&h78[1:0] = “0”） after the smooth transition is completed.

Treble smooth transition

2

Setting of P

Treble medium・high-band gain

Default = 0h

Select Address Operational explanation

&h76 [ 7：4 ]

Command Gain

0 0dB 1 2 3 4 5 6 7

+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

www.rohm.com

31/54

2012.03 - Rev.

BU9409FV

A

Technical Note

44--1133.. SSccaalleerr 22

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 2 does not incorporate the smooth transition function.

Default = 30h

Select Address Operational explanation

&h25 [ 7：0 ]

Command Gain

00 01 +23.5dB

30 31 32

……

FE FF

+24dB

0dB

-0.5dB

-1dB

……

-103dB

-∞

44--1144.. 77 bbaanndd・・ppaarraammeettrriicc eeqquuaalliizzeerr

77--bbaanndd ppaarraammeettrriicc eeqquuaalliizzeerr

an use Peaking filter, Low-shelf filter or high-shelf filter.

c

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

f

Level

±18dB

(0.5dB step)

63 160 400 1k 2.5k 6.3k 16k (Hz)

Selection of filter types

Default = 0

Select Address Value Operational explanation

bit[ 7:6 ]

It sets to all band

0 Peaking filter

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 Operational explanation

bit [ 0 ]

It sets to all band

0 Coefficient transmission stop

1 Coefficient transmission start

www.rohm.com

32/54

2012.03 - Rev.

BU9409FV

A

Selection of frequency（F0）

Default = 0Eh

Select

Operational explanation

Address

bit [ 5:0 ]

It sets to all

band

Command

00 01 02 03 04 05 06 07

Frequency

20Hz 22Hz 25Hz 28Hz 32Hz 35Hz 40Hz 45Hz

Command

08 09 0A 0B 0C 0D 0E 0F

Frequency

50Hz 56Hz 63Hz 70Hz 80Hz

90Hz 100Hz 110Hz

Command

10 11 12 13 14 15 16 17

Frequency

125Hz 140Hz 160Hz 180Hz 200Hz 220Hz 250Hz 280Hz

Command

18 19 1A 1B 1C 1D 1E 1F

Frequency

315Hz 350Hz 400Hz 450Hz 500Hz 560Hz 630Hz 700Hz

Command

20 21 22 23 24 25 26 27

Selection of quality factor（Q）

Default = 4h

Select Address Operational explanation

bit [ 3:0 ]

It sets to every band

Command

Quality factor

0 1 2 3 4 5 6 7

0.33

0.43

0.56

0.75

1.0

1.2

1.5

1.8

Selection of Gain

Default = 40h

Select Address Operational explanation

bit [ 6:0 ]

It sets to every band

Command Gain

1C -18dB

…

3E -1dB 3F 40 41

…

64

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

Selection of filter type bit [ 7:6 ]

Setting of the Start of transmitting to

&h50h &h54h &h58h &h5Ch &h60h &h64h &h68h

coefficient RAM bit [ 0 ]

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

Frequency

800Hz 900Hz

1kHz

1.1kHz

1.25kHz

1.4kHz

1.6kHz

1.8kHz

Command

8 9 A B C D E F

-0.5dB

+0.5dB

+1dB42

+18dB

28

29 2A 2B 2C 2D

2E 2F

…

0dB

…

Frequency

2kHz

2.2kHz

2.5kHz

2.8kHz

3.15kHz

3.5kHz 4kHz

4.5kHz

Quality factor

2.2

2.7

3.3

3.9

4.7

5.6

6.8

8.2

Technical Note

Frequency

Command

5kHz

30 31

5.6kHz

6.3kHz

32 33

7kHz 8kHz

34 35

9kHz

10kHz

36 37

11kHz

Command

38 39 3A 3B 3C 3D 3E 3F

Frequency

12.5kHz 14kHz 16kHz 18kHz 20kHz

-

www.rohm.com

33/54

2012.03 - Rev.

BU9409FV

A

Technical Note

44--1155.. MMaaiinn oouuttppuutt EEVVRR （（EElleeccttrroonniicc vvoolluummee））

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

&h26 [ 7：0 ]

Command Gain

00 01 +23.5dB

30 31 32

……

FE

FF

+24dB

0dB

-0.5dB

-1dB

……

-103dB

-∞

44--1166.. MMaaiinn oouuttppuutt bbaallaannccee

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

&h27 [ 7：0 ]

Command Lch

00 01

…

7F

80

81

…

FE

-126dB

0dB 0dB

…

0dB 0dB

-1dB

…

Rch

-∞

-126dB

…

-1dB0dB7E 0dB 0dB 0dB

…

0dB 0dB-∞FF

44--1177.. MMaaiinn oouuttppuutt ppoossttssccaalleerr

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

&h28 [ 7：0 ]

Command Gain

00 01 +23.5dB

30 31 32

……

FE FF

+24dB

0dB

-0.5dB

-1dB

……

-103dB

-∞

www.rohm.com

34/54

2012.03 - Rev.

BU9409FV

A

Technical Note

44--1188.. MMaaiinn oouuttppuutt cclliippppeerr

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.

Please set the &h27[7] at “H” when using of clipper function.

Default = 0

Select Address Value Operational explanation

Clip level is set in the form of higher-order 8 bit&h2A[7:0] and lower-order 8 bit&h2B[7:0].

&h29 [ 7 ]

Clip Level

0 Not using clipper function

1 Using clipper function

23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

10111 1111111111111111111

01000 0000000000000000000 0 1

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.

44--1199.. SSeelleeccttiioonn ooff ssuubb iinnppuutt ddaattaa

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 BU9409FV, the data can be inputted from SP conversion2.

Default = 0

clip_level[15:0]

~clip_level[15:0]

Select Address Value Operational explanation

&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

0000000 1111111

Maximum value

Minimum value

A positive clip level A negative clip level

The

clip

leve

www.rohm.com

35/54

2012.03 - Rev.

BU9409FV

A

Technical Note

44--2200.. SSuubb oouuttppuutt cchhaannnneell mmiixxeerr

Mixing setting of sound of the left channel and the right channel of the digital signal for sub output which is input into sound

DSP is done. The monaural conversion of the stereo signal is done here.

The data which is input into Lch of Sub output signal processing is mixed.

Default = 0

Select Address Value Operating explanation

&h22 [ 3：2 ]

The data which is input into Rch of Sub output signal processing is mixed.

Default = 0

Select Address Value Operating explanation

&h22 [ 1：0 ]

44--2211.. LLPPFF ffoorr ssuubb wwooooffeerr oouuttppuutt

It is the crossover filter (LPF) for sub woofer output. LPF function ON/OFF.

Default = 0

Select Address Value Operating explanation

&h7A [ 7 ]

Setting of the cut off frequency (Fc) of LPF

Default = 0h

Select Address Operating explanation

&h7A [ 6：4 ]

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

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

0 LPF function is not used

1 LPF function is used

Command Fc

0 1 2 3

60Hz

80Hz 100Hz 120Hz

Command

4 5 6 7

Fc

160Hz 200Hz 240Hz 280Hz

www.rohm.com

36/54

2012.03 - Rev.

BU9409FV

A

Technical Note

44--2222.. SSuubb oouuttppuutt 33 bbaanndd

Parametric Equalizer

The peaking filter or the low shelf filter or the high shelf filter can be used by the parametric equalizer of 3 bands. By the fact

that F, Q and Gain are selected, it converts the setting to the coefficient (b0, b1, b2, a1 and a2) of the digital filter inside IC,

and transfers it to the coefficient RAM. There is no smooth transition function.

Band1 Band2 Band3

f

Level

±18dB

(0.5dB step)

Selection of filter type

Default = 0

63 80 100 (Hz)

Select Address Value Operating explanation

bit[ 7:6 ]

It sets to all band

0 Peaking filter

1 Low shelf filter

2 High shelf filter

Transfer start setting to coefficient RAM.

It transfers directly to coefficient RAM.

Default = 0

Select Address Value Operating explanation

bit [ 0 ]

It sets to all band

0 Coefficient transmission stop

1 Coefficient transmission start

Selection of frequency (F

Default = 0Eh

Select

)

0

Operating explanation

Address

bit [ 5:0 ]

It sets to all

band

Command

00 01 02 03 04 05 06 07

Frequency

20Hz 22Hz 25Hz 28Hz 32Hz 35Hz 40Hz 45Hz

Command

08

09 0A 0B 0C 0D

0E

0F

Frequency

50Hz 56Hz 63Hz 70Hz 80Hz

90Hz 100Hz 110Hz

Command

10 11 12 13 14 15 16 17

Frequency

125Hz 140Hz 160Hz 180Hz 200Hz 220Hz 250Hz 280Hz

Command

18 19 1A 1B 1C 1D 1E 1F

Frequency

315Hz 350Hz 400Hz 450Hz 500Hz 560Hz 630Hz 700Hz

Command

20 21 22 23 24 25 26 27

Frequency

800Hz 900Hz

1kHz

1.1kHz

1.25kHz

1.4kHz

1.6kHz

1.8kHz

Command

28 29 2A 2B 2C 2D 2E 2F

Frequency

2kHz

2.2kHz

2.5kHz

2.8kHz

3.15kHz

3.5kHz 4kHz

4.5kHz

Command

30 31 32 33 34 35 36 37

Frequency

5kHz

5.6kHz

6.3kHz 7kHz 8kHz 9kHz

10kHz 11kHz

Command

38

39 3A 3B 3C 3D 3E

3F

Selection of quality factor (Q)

Default = 4h

Select Address Operating explanation

bit [ 3:0 ]

It sets to all band

Command

Quality factor

0 1 2 3 4 5 6 7

Command

0.33

0.43

0.56

0.75

1.0

1.2

1.5

1.8

Quality factor

8 9 A

B C D

E

F

2.2

2.7

3.3

3.9

4.7

5.6

6.8

8.2

Frequency

12.5kHz 14kHz 16kHz 18kHz 20kHz

-

www.rohm.com

37/54

2012.03 - Rev.

BU9409FV

A

Selection of Gain

Default = 40h

Select Address Operating explanation

bit [ 6:0 ]

It sets to all band

Command Gain

1C -18dB

…

3E -1dB 3F 40 41

…

-0.5dB 0dB

+0.5dB

+1dB42

…

Technical Note

64

+18dB

If the coefficient of b0, b1, b2, a1, and a2 exceeds ±4, it may not operate normally.

Select Address of every band is as in chart below

Band1 Band2 Band3

Selection of filter type bit [ 7:6 ]

&h80h &h84h &h88h

Transfer start setting to coefficient RAM

bit [ 0 ]

F (frequency) selection bit [ 5:0 ] &h81h &h85h &h89h

Q (quality factor) selection bit [ 3:0 ] &h82h &h86h &h8Ah

Gain selection bit [ 6:0 ] &h83h &h87h &h8Bh

44--2233.. SSuubb oouuttppuutt EEVVRR ((eelleeccttrroonniicc vvoolluummee))

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

&h2C [ 7：0 ]

Command Gain

00 01 +23.5dB

30 31 32

……

FE FF

+24dB

0dB

-0.5dB

-1dB

……

-103dB

-∞

www.rohm.com

38/54

2012.03 - Rev.

BU9409FV

A

Technical Note

44--2244.. SSuubb oouuttppuutt bbaallaannccee

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

&h2D [ 7：0 ]

Command Lch

00 01

…

7F 80 81

…

FE

0dB 0dB

…

0dB 0dB

-1dB

…

-126dB

Rch

-∞

-126dB

…

-1dB0dB7E 0dB 0dB 0dB

…

0dB 0dB-∞FF

44--2255.. SSuubb oouuttppuutt ppoosstt ssccaalleerr

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

&h2E [ 7：0 ]

Command Gain

00 01 +23.5dB

30 31 32

……

FE FF

+24dB

0dB

-0.5dB

-1dB

……

-103dB

-∞

www.rohm.com

39/54

2012.03 - Rev.

BU9409FV

A

Technical Note

44--2266.. SSuubb oouuttppuutt cclliippppeerr

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.

Please designate &h30 [7] as” H when using sub output clipper function.

Default = 0

As for clip level, it sets with superior 8 bits &h31 [7: 0] and subordinate 8 bits &h32 [7: 0].

Clip Level

Select Address Value Operating explanation

&h30 [ 7 ]

0 Clipper function is not used

1 Clipper function is used

23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

10111 1111111111111111111

01000 0000000000000000000 0 1

g value is made small, clip level becomes narrow.

As for negative clip level, the reversal data of positive clip level is set.

clip_level[15:0]

~clip_level[15:0]

0000000 1111111

Maximum value

Minimum value

A positive clip level A negative clip level

When

settin

www.rohm.com

40/54

2012.03 - Rev.

BU9409FV

A

Technical Note

44--2277.. DDiirreecctt sseettttiinngg ffiivvee ccooeeffffiicciieenntt ooff bb00,, bb11,, bb22,, aa11 aanndd aa22 ooff BBii--qquuaadd FFiilltteerr

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 Operating explanation

&h8C [ 7 ]

0 Coefficient transmission stop

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

-1

Z

-1

Z

Coefficient

：number

14

H.

b0

+

+ +

15

16

H.

17

H.

BAND1 (Main)

H

a1b1

+ +

18

H

a2b2

Sub output　3Band Parametric EQ

Coefficient

37

H.

b0

-1

Z

38

H.

-1

Z

39

H.

Coefficient

19

b0

-1

Z

1A

-1

Z

1B

：number

+

+ +

BAND1 (Sub) BAND2 (Sub) BAND3 (Sub)

Coefficient

：number

H.

+ +

-1

Z

1C

+ +

-1

Z

-1

Z

1D

Z

H

a1b1

Z

H

a2b2

Coefficient

3C

b0

-1

3D

-1

3E

-1

H.

BAND2 (Main) BAND3 (Main) BAND4 (Main) BAND5 (Main) BAND6 (Main) BAND7 (Main)

3A

H

a1b1

3B

H

a2b2

：number

1E

H.

b0

+ +

-1

Z

1F

H.

+ +

-1

Z

20

H.

：number

H.

+ +

3F

40

H

a1b1

H

a2b2

H.

+ +

21

a1b1

22

H

a2b2

-1

Z

-1

Z

Coefficient

：number

23

H.

b0

+ +

-1

Z

-1

Z

-1

Z

Coefficient

41

b0

-1

42

-1

43

24

H.

25

H.

：number

H.

H

26

+ +

27

+

44

+ +

45

Coefficient

：number

28

H.

b0

+ +

-1

Z

H

a1b1

H

a2b2

29

H.

-1

Z

2A

H.

-1

Z

H

a1b1

-1

Z

H

a2b2

+ +

2B

a1b1

2C

a2b2

Coefficient

：number

2D

H.

b0

+ +

-1

Z

H

2E

H.

-1

Z

2F

H.

+ +

30

a1b1

31

a2b2

Coefficient

：number

32

H.

b0

-1

Z

H

33

H.

+ +

-1

Z

34

H.

+

-1

Z

35

H

a1b1

-1

Z

36

H

a2b2

www.rohm.com

41/54

2012.03 - Rev.

BU9409FV

A

Technical Note

44--2288.. AAbboouutt tthhee aauuttoommaattiicc rreenneewwaall ooff ffiivvee ccooeeffffiicciieennttss ooff bb00,, bb11,, bb22,, aa11 aanndd aa22 ooff BBii--qquuaadd FFiilltteerr

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.

here is an automatic renewal function of coefficient RAM in this DSP, the automatic write-in renewal of coefficient RAM is

T 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 ]

The separate setting of Filter of automatic write-in renewal function

Default = 00h

Select Address Filter Operating explanation

&h6E [ 0 ] BASS 0：Automatic renewal function OFF

&h6E [ 1 ] MIDDLE 0：Automatic renewal function OFF

&h6E [ 2 ] TREBLE 0：Automatic renewal function OFF

&h6E [ 4 ] Sub BAND1 0：Automatic renewal function OFF

&h6E [ 5 ] Sub BAND2 0：Automatic renewal function OFF

&h6E [ 6 ] Sub BAND3 0：Automatic renewal function OFF

&h6F [ 0 ] Main MAND1 0：Automatic renewal function OFF

&h6F [ 1 ] Main MAND2 0：Automatic renewal function OFF

&h6F [ 2 ] Main MAND3 0：Automatic renewal function OFF

&h6F [ 3 ] Main MAND4 0：Automatic renewal function OFF

&h6F [ 4 ] Main MAND5 0：Automatic renewal function OFF

&h6F [ 5 ] Main MAND6 0：Automatic renewal function OFF

&h6F [ 6 ] Main MAND7 0：Automatic renewal function OFF

0 Automatic write-in renewal function is used

1 Automatic write-in renewal function is not used

1：Automatic renewal function ON

www.rohm.com

42/54

2012.03 - Rev.

BU9409FV

A

Technical Note

5. P-S conversion 1 ,P-S conversion 2

Two parallel serial conversion circuits are built in BU9409FV. (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

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 31 32 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 31 32

BCKO

MSB LSB

S

DATAO

16bit

MSB LSB

S

16bit

20bit

24bit

20bit

24bit

left-align mode

左詰方式

LRCKO

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 31 32 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 31 32

BCKO

MSB L SB

S

DATAO

16bit

20bit

24bit

MSB L SB

S

16bit

20bit

24bit

right-align mode

右詰方式

LRCKO

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 31 32 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 31 32

BCKO

DATAO

MSB LSB

S

16bit

20bit

24bit

MSB LSB

S

16bit

20bit

24bit

p

55--11.. FFoorrmmaatt sseettttiinngg ooff tthhrreeee lliinnee sseerriiaall oouuttp

Default =

0

uutt

Select Address Value Operating Description

P-S conversion 1 &h0D [ 3：2 ]

P-S conversion 2

& h0E [ 3：2 ]

0 IIS mode

1 left-align mode

2 right-align mode

55--22.. SSeettttiinngg ddaattaa bbiitt wwiiddtthh ooff tthhrreeee lliinnee sseerriiaall oouuttppuutt

Default =

0

Select Address Value Operating Description

P-S conversion 1 &h0D [ 1：0 ]

P-S conversion 2

& h0E [ 1：0 ]

0 16 bit

1 20 bit

2 24 bit

www.rohm.com

43/54

2012.03 - Rev.

BU9409FV

A

6. Mute function by command

Mute function by command is provided in BU9409FV.

It's possible to mute DSP's main and sub digital output by setting to &hFD [ 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

Technical Note

7. Clock halt function of DSP part

Clock halt function of DSP part with terminal MUTEX_DAC and MUTEX_SP is provided in BU9409FV.

Clock halt function’s setting

Default = 0

Select Address Value Operating Description

&hA9 [ 7 ]

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.

0 Don’t use the clock halt function

1 Use the clock halt function

www.rohm.com

44/54

2012.03 - Rev.

BU9409FV

A

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] = 10h ：Set the dividing frequency ratio of MCLK. Please do as follows to set a value by fs of

MCLK.

（MCLK:512fs=10h、256fs=08h、128fs=04h）

↓

4. &hF5[3:0] = 1h：Set the dividing frequency ratio of PLL.

↓

5. &hF6[5:0] = 23h：Set the phase match of PLL.

↓

6. &hF1[4] = 0 ：Turn on the analog input.

↓

7. &h08[5:4] = 1h ：Select the system clock.

↓

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 20ms weight until PLL is steady.

↓

10. &h01[5:4] = 0h ：Turn off the RAM Clear.

↓

11. 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）.

Technical Note

www.rohm.com

45/54

2012.03 - Rev.

BU9409FV

A

Technical Note

9. About frequency setting such as tone control and parametric equalizer

Because the sampling rate converter is not built into BU9409FV, 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

00 01 02 03 04 05 06 07

Frequency

20Hz 22Hz 25Hz 28Hz 32Hz 35Hz 40Hz 45Hz

Command

08 09 0A 0B 0C 0D 0E 0F

Frequency

50Hz 56Hz 63Hz 70Hz 80Hz

90Hz 100Hz 110Hz

Command

10 11 12 13 14 15 16 17

Frequency

125Hz 140Hz 160Hz 180Hz 200Hz 220Hz 250Hz 280Hz

Command

18 19 1A 1B 1C 1D 1E 1F

Frequency

315Hz 350Hz 400Hz 450Hz 500Hz 560Hz 630Hz 700Hz

Command

20 21 22 23 24 25 26 27

Frequency

800Hz 900Hz

1kHz

1.1kHz

1.25kHz

1.4kHz

1.6kHz

1.8kHz

Command

28 29 2A 2B 2C 2D 2E 2F

Frequency

2kHz

2.2kHz

2.5kHz

2.8kHz

3.15kHz

3.5kHz 4kHz

4.5kHz

Command

30 31 32 33 34 35 36 37

Frequency

5kHz

5.6kHz

6.3kHz 7kHz 8kHz 9kHz

10kHz 11kHz

Command

38 39 3A 3B 3C 3D 3E 3F

F0 (fs=44.1kHz)

Command

00 01 02 03 04 05 06 07

Frequency

18Hz 20Hz 23Hz 26Hz 29Hz 32Hz 37Hz 41Hz

Command

08

09 0A 0B 0C 0D

0E

0F

Frequency

46Hz 51Hz 58Hz 64Hz 74Hz 83Hz 92Hz

101Hz

Command

10 11 12 13 14 15 16 17

Frequency

115Hz 129Hz 147Hz 165Hz 184Hz 202Hz 230Hz 257Hz

Command

18

19 1A 1B 1C 1D

1E

1F

Frequency

289Hz 322Hz 368Hz 413Hz 459Hz 515Hz 579Hz 643Hz

Command

20 21 22 23 24 25 26 27

Frequency

735Hz 827Hz 919Hz

1.01kHz

1.15kHz

1.29kHz

1.47kHz

1.65kHz

Command

28 29 2A 2B 2C 2D 2E 2F

Frequency

1.84kHz

2.02kHz

2.3kHz

2.57kHz

2.89kHz

3.22kHz

3.68kHz

4.13kHz

Command

30 31 32 33 34 35 36 37

Frequency

4.59kHz

5.15kHz

5.79kHz

6.43kHz

7.35kHz

8.27kHz

9.19kHz

10.1kHz

Command

38

39 3A 3B

3C 3D

3E 3F

Frequency

12.5kHz 14kHz 16kHz 18kHz 20kHz

-

Frequency

11.5kHz

12.9kHz

14.7kHz

16.5kHz

18.4kHz

-

F0 (fs=32kHz)

Command

00 01 02 03 04 05 06 07

Frequency

13Hz 15Hz 17Hz 19Hz 21Hz 23Hz 27Hz 30Hz

Command

08 09 0A 0B 0C 0D 0E 0F

Frequency

33Hz 37Hz 42Hz 47Hz 53Hz 60Hz 67Hz 73Hz

Command

10 11 12 13 14 15 16 17

Frequency

83Hz

93Hz 107Hz 120Hz 133Hz 147Hz 167Hz 187Hz

Command

18 19 1A 1B 1C 1D 1E 1F

Frequency

210Hz 233Hz 267Hz 300Hz 333Hz 373Hz 420Hz 467Hz

Command

20 21 22 23 24 25 26 27

Frequency

533Hz 600Hz 667Hz 733Hz 833Hz 933Hz

1.07kHz

1.2kHz

Command

28 29 2A 2B 2C 2D 2E 2F

Frequency

1.33kHz

1.47kHz

1.67kHz

1.87kHz

2.1kHz

2.33kHz

2.67kHz 3kHz

Command

30 31 32 33 34 35 36 37

Frequency

3.33kHz

3.73kHz

4.2kHz

4.67kHz

5.33kHz 6kHz

6.67kHz

7.33kHz

Command

38

39 3A 3B 3C 3D 3E 3F

Frequency

8.33kHz

9.33kHz

10.7kHz 12kHz

13.3kHz

-

www.rohm.com

46/54

2012.03 - Rev.

BU9409FV

A

Technical Note

1100.. AAbboouutt aa sseettuupp ooff aa cclloocckk,, aanndd tthhee iinnppuutt ooff aa ccoommmmaanndd

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.

MCLK

I2C

CONTROL LOGIC

&hF3[5:0]

DIV

PLLA PLL_DIV

DSP

S E L 1

AUDIO IF

ERROR_DET

BU9409FV Clock line

&h08[5:4]

S

E L 2

The clock system figure of BU9409FV 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.

SYSCLKO

www.rohm.com

47/54

2012.03 - Rev.

BU9409FV

A

Technical Note

1111.. AAbboouutt tthhee cchhaannggee ooff aa ssaammpplliinngg rraattee

1111--11.. WWhheenn aa ssaammpplliinngg rraattee cchhaannggee ccaann pprreeddiicctt bbeeffoorreehhaanndd

hen the change of a sampling rate can predict beforehand, please switch a sampling rate in the following

W

procedures.

he mute of the DAC is carried out (MUTEX_SP and MUTEX_DAC are set to L and it is a mute about BD5446.).

1．T

↓

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 20 msec WAIT and &h08 [5:4] =1h, since it is PLL stability. ↓

8. A RAM clearance is canceled by setting it as &h01 = 0.

↓

9. Since the coefficient is cleared, please set up DSP.

↓

10. Please cancel a DAC mute.

1111--22.. WWhheenn aa ssaammpplliinngg rraattee cchhaan

Pleas

e 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 20 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．A

RAM clearance is canceled by setting it as &h01 = 0.

↓

８．Since the coefficient is cleared, please set up DSP.

↓

９．Please cancel a DAC mute.

nggee ccaannnnoott pprreeddiicctt bbeeffoorreehhaanndd

www.rohm.com

48/54

2012.03 - Rev.

BU9409FV

A

Technical Note

1111--33.. WWhheenn tthhee ffrreeqquueennccyy mmoorree tthhaann aa ssttoopp oorr tthhee ssppeecciiffiiccaattiioonn rraannggee ddooeess nnoott eenntteerr

[[ MMCCLLKK ]] aatt tthhee ttiimmee ooff aa ssaammpplliinngg rraattee cchhaannggee

W

hen 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 20ms 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. Please cancel a DAC mute.

www.rohm.com

49/54

2012.03 - Rev.

BU9409FV

A

Technical Note

1122.. WWhheenn tthhee cclloocckk wwhhiicchh eexxcceeeeddeedd tthhee ssppeecciiffiiccaattiioonn rraannggee ffrroomm MMCCLLKK iiss iinnppuutttteedd

hen the frequency beyond fs=48kHz is inputted from

W

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

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

The time of Ter serves as about 70 usec.

The frequency limit that DSP can operate

MCLK inputted frequency

Time

Ter

www.rohm.com

50/54

2012.03 - Rev.

BU9409FV

A

13. Audio Interface Signal Specification

○Electric specification and timing of MCK, BCK, LRCK, and SDATA1 and SDATA2

MCLK

1/ｆMCLK

LRCK

1/fLRCK

Technical Note

BCK

LRCK

BCK

SDATA1,SDATA2

tBCK

tBCK H tBCK L

Fig 1-2 Clock timing

tBLRDG

Fig 1-3 Audio interface timing

tLBRD G

tSU;SD

tHD;SD

Parameter Sign Unit

1

MCK

2 DUTY dSCLK 40 60 %

3

LRCK

4 DUTY dLRCK 40 60 %

5

BCK

6 H width tBCKH 130 － ns

Frequency fSCLK 4.096 24.576 MHz

Frequency fLRCK 32 48 kHz

Cycle tBCK 325 － ns

Min. Max.

7 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

51/54

2012.03 - Rev.

BU9409FV

A

14. Notes at the Time of Res et

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 BU9409FV 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 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]

Soft transition will be completed if the read-out result of &hF4 [0] is L.

Technical Note

www.rohm.com

52/54

2012.03 - Rev.

BU9409FV

A

●Cautions

(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.

Technical Note

www.rohm.com

53/54

2012.03 - Rev.

BU9409FV

A

●Ordering Information

Technical Note

B U 9 4 0 9 F V E2

Part Number

Package FV: SSO-B40

●Physical Dimension Tape and Reel Information

SSOP-B40

13.6 ± 0.2

(MAX 13.95 include BURR)

40

21

1.8 ± 0.1

7.8 ± 0.3

5.4 ± 0.2

1

0.1

0.65

0.22 ± 0.1

0.08

20

M

0.5 ± 0.2

0.15 ± 0.1

0.1 S

(Unit : mm)

Embossed carrier tapeTape

Quantity

Direction of feed

2000pcs 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

Reel

●Marking Diagram(s)(TOP VIEW)

Packaging and forming specification E2: Embossed tape and reel

1pin

Order quantity needs to be multiple of the minimum quantity.

∗

Direction of feed

BU9409F

Lot No.

www.rohm.com

54/54

2012.03 - Rev.

Notes

No copying or reproduction of this document, in part or in whole, is permitted without the consent of ROHM Co.,Ltd.

The content specied herein is subject to change for improvement without notice.

The content specied herein is for the purpose of introducing ROHM's products (hereinafter "Products"). If you wish to use any such Product, please be sure to refer to the specications, which can be obtained from ROHM upon request.

Examples of application circuits, circuit constants and any other information contained herein illustrate the standard usage and operations of the Products. The peripheral conditions must be taken into account when designing circuits for mass production.

Great care was taken in ensuring the accuracy of the information specied in this document. However, should you incur any damage arising from any inaccuracy or misprint of such information, ROHM shall bear no responsibility for such damage.

The technical information specied herein is intended only to show the typical functions of and examples of application circuits for the Products. ROHM does not grant you, explicitly or implicitly, any license to use or exercise intellectual property or other rights held by ROHM and other parties. ROHM shall bear no responsibility whatsoever for any dispute arising from the use of such technical information.

The Products specied in this document are intended to be used with general-use electronic equipment or devices (such as audio visual equipment, ofce-automation equipment, communication devices, electronic appliances and amusement devices).

The Products specied in this document are not designed to be radiation tolerant.

While ROHM always makes efforts to enhance the quality and reliability of its Products, a Product may fail or malfunction for a variety of reasons.

Please be sure to implement in your equipment using the Products safety measures to guard against the possibility of physical injury, re or any other damage caused in the event of the failure of any Product, such as derating, redundancy, re control and fail-safe designs. ROHM shall bear no responsibility whatsoever for your use of any Product outside of the prescribed scope or not in accordance with the instruction manual.

The Products are not designed or manufactured to be used with any equipment, device or system which requires an extremely high level of reliability the failure or malfunction of which may result in a direct threat to human life or create a risk of human injury (such as a medical instrument, transportation equipment, aerospace machinery, nuclear-reactor controller, fuelcontroller or other safety device). ROHM shall bear no responsibility in any way for use of any of the Products for the above special purposes. If a Product is intended to be used for any such special purpose, please contact a ROHM sales representative before purchasing.

If you intend to export or ship overseas any Product or technology specied herein that may be controlled under the Foreign Exchange and the Foreign Trade Law, you will be required to obtain a license or permit under the Law.

Notice

Thank you for your accessing to ROHM product informations. More detail product informations and catalogs are available, please contact us.

ROHM Customer Support System

http://www.rohm.com/contact/

R1120

A

ROHM BU9409FV Technical data

Specifications and Main Features

Frequently Asked Questions

User Manual