ROHM BU9414FV Technical data

A

Digital Sound Processors for FPD TVs

32bit Audio DSP

BU9414FV

●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: 32bit (Data RAM) The fastest 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 (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

Pre-Scaler, DC cut HPF, Channel Mixer, P TREBLE, Pseudo BASS, Surround, P 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)

2

Volume(Perfect Pure Volume), BASS, MIDDLE,

2

Bass, P2Treble, 7Band Parametric EQ,

No.12083EAT04

www.rohm.com

1/57

2012.03 - Rev.

BU9414FV

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

-25～+85 °C

opr

-55～+125 °C

stg

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

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

www.rohm.com

2/57

2012.03 - Rev.

BU9414FV

A

Technical Note

●Electric characteristic(Digital serial)

V

=3.3V unless specified, Ta=25°C

DD

Rating value

Unit Terms Adaptive

terminal

V

=0～3.3V

IN

*1

Hysteresis

Input voltage

Item Symbol

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

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

Rating Value

Unit Object pin/Condition

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

www.rohm.com

3/57

2012.03 - Rev.

BU9414FV

A

Technical Note

●Block diagram

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

SDAO

SCLO

N.C.

2526

24 23 22 21

SPDIFO

N.C.

ADDR

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

SCLI

SDAI

１VSS

LDO15

DVDDCORE

12

16

N.C.

REG15

LDOPOFF

VDD

ANATEST

PLLA

17 18 19 20

N.C.

２VSS

PLLFIL

MODE

Block diagram

Fig.2

www.rohm.com

4/57

2012.03 - Rev.

BU9414FV

A

Technical Note

●Pin Description(s)

No.

Name Description of terminals

1 N.C (*2)

Type

-

No.

Name Description of terminals

21 ADDR I2C Slave address selection

Type

B

terminal 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

D

22 SPDIFO S/PDIF Signal output

D

23 N.C

D

24 N.C

B

25 N.C

B

26 N.C

B

27 N.C

F

28 SDAO 2 line serial data output（*1）

E

29 SCLO 2 line serial clock output（*1）

-

30 MUTEX_DACO DAC mute signal output(*1)

-

31 MUTEX_SPO SP mute signal output(*1)

G

32 RESETXO Reset signal output(*1)

G

33 SDATAO2 I2S Audio data output 2

C

-

C C C C C C

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.

G

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）

G

38 VSS3 Digital I/O GND

-

39 MCLK Master clock input

A

40 BCKI I2S Audio clock input

C C C C

H D

www.rohm.com

5/57

2012.03 - Rev.

BU9414FV

A

Technical Note

● Pin Equivalent Circuit Diagrams

A B C

VDD

VSS

D E F

VDD

VSS

G H

VDD

VSS

VDD

VSS

www.rohm.com

6/57

2012.03 - Rev.

BU9414FV

A

6

5

Technical Note

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.

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,

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

SDAI

MSB

LSB

SCLI

Start condition

Stop condition

When SDAI ,SCLI=”H”

↓

When SDAI , SCLI=”H”

↑

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

Setting of BU9414FV slave address

Terminal setting Write-mode

ADDR

Slave-address 0 80h 1 82h

1 0 0 0 0 0 1 0

S Slave Address

Select Address A Data A Data A Data A P

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

www.rohm.com

7/57

2012.03 - Rev.

BU9414FV

A

Technical Note

Writing procedure

Step Clock Master Slave(BU9414FV) Note

1 Start Condition

2 7 Slave Address

3 1 R/W (0)

&h80 (&h82)

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(BU9414FV) Note

1 Start Condition

2 7 Slave Address

3 1 R/W (0)

&h80 (&h82)

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)

&h81 (&h82)

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.

www.rohm.com

8/57

2012.03 - Rev.

BU9414FV

A

Technical Note

1-3. Control signal specification

○ 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

P

Fig.1-1: Timing chart

Table 1-1: SDAI and SCLI bus-line characteristic (Unless specified, Ta=25°C, 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.

www.rohm.com

9/57

2012.03 - Rev.

BU9414FV

A

Technical Note

2.Switching of data and clock

I/O system chart of BU9414FV audio data is shown below.

Digital input1

Digital input2

SEL1

SDATA1

SDATA2

Audio DSP (BU9414FV)

S-P

conversi

on1

S-P

conversi

on2

DSP CLK (512fs)

DSP oper atio n 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

(Main SP)

D Class amp output

(Sub Woofer)

Optical output

BU9414FV 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.

www.rohm.com

10/57

2012.03 - Rev.

BU9414FV

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 ]

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.

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

Default = 0

Select Address Value Operatin

&h05 [ 1：0 ]

g Description

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.

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 ]

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

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.

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

&hF3

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

128fs（6.144MHz、fs=48kHz）

10h 01h 00h

08h 01h 00h

04h 01h 00h

Setting of pll_div

&hF5

PLL initialization

&hF6

www.rohm.com

11/57

2012.03 - Rev.

BU9414FV

A

Technical Note

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

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 LSB

S

DATAI

16bit

20bit

24bit

MSB LSB

S

16bit

20bit

24bit

Right-justified

右詰方式

method

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 L SB

S

16bit

20bit

24bit

MSB LSB

S

16bit

20bit

24bit

www.rohm.com

12/57

2012.03 - Rev.

BU9414FV

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 ]

0 64fs method

1 48fs method

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

Default = 0

Select Address Value Operational explanation

S-P conversion1 &h0B [ 3：2 ]

S-P conversion2 &h0C [ 3：2 ]

0 IIS method

1 left-justified method

2 right-justified method

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

Default =

0

Select Address Value Operational explanation

S-P conversion1 &h0B [ 1：0 ]

S-P conversion2 &h0C [ 1：0 ]

0 16 bit

1 20 bit

2 24 bit

www.rohm.com

13/57

2012.03 - Rev.

BU9414FV

A

Technical Note

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.

2

Prescaler, DC Cut HPF, Channel Mixer, P

2

Pseudo Stereo, Surround, P

Bass, Pseudo Bass, P2Treble, 7 Band・Parametric Equalizer, Master Volume, L/R

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

Balance, PostScaler, Output Clipper.

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 → 32 bit

Data RAM：

Coefficient RAM： 128×24 bit

256×32 bit

MUX

Data

Input

RAM

Coefficient

operation

MUX

0

Circuit

Coefficient

M U X

RAM

Decoder

circuit

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

DC cut

HPF

Channel

mixer

Digital Audio Processing Signal Flow

P2Volume

Surround

BASS MIDDLE TREBLE

Pseudo

BASS

P2Bass P2Treble

Scaler

7Band

Parametric

EQ

EVR

＆

Blance

EVR

＆

Blance

2Band

DRC

＆

Clipper

Post

scaler

＆

Clipper

Main output

Sub output

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

-∞

……

www.rohm.com

14/57

2012.03 - Rev.

BU9414FV

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

Select Address Value Operational explanation

&h21 [ 0 ]

0 Not using the DC Cut HPF

1 Using the DC Cut HPF

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

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 Operational explanation

&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

15/57

2012.03 - Rev.

BU9414FV

A

Technical Note

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

min

Ｉ

and output is below V

min

Ｉ

2

Volume function.

Omax

α： Lifting the Whole output level by the offset value α

(3) When output level Ｖ

V

= K・VI + α

O

exceeds V

Ｏ

Omax

V

O

V

Omax

P2V_MAX

(2)

P2V off

K

(3)

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

0dB

V

I

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

Setting of V

P2V_MAX sets the output suppression level. It represents the output level V

max

Ｏ

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

max

Ｏ

case of setting of P2V_K = “0h”（slope is 0）.

Default = 00h

Select Address Operational explanation

&h35 [ 4:0 ]

command gain

00 0dB 01 02 03 04 05 06 07

-1dB

-2dB

-3dB

-4dB

-5dB

-6dB

-7dB

command gain

08

-8dB

09

-9dB

-10dB

0A

-11dB

0B 0C

-12dB

0D

-13dB

0E

-14dB

0F

-15dB

command gain

10

-16dB

11

-17dB

-18dB

12

-19dB

13 14

-20dB

15

-21dB

16

-22dB

17

-23dB

command gain

18

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

www.rohm.com

16/57

-24dB

-25dB

-26dB

-27dB

-28dB

-29dB

-30dB

-

2012.03 - Rev.

BU9414FV

A

Technical Note

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

at the time of

max

Ｏ

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

command gain

18

+24dB 19 1A 1B 1C 1D 1E 1F

-

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

5ms 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

www.rohm.com

17/57

2012.03 - Rev.

BU9414FV

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

0 50ms 1 100ms 2 3

150ms 200ms

2

Volume is started.

A_TIME 4 5 6 7

2

Volume is started.

command

4 5 6 7

3ms 4ms 5ms 6ms

R_TIME

300ms 400ms 500ms 600ms

www.rohm.com

18/57

2012.03 - Rev.

BU9414FV

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

A_RATE_LOW Time

Command

4

5 3ms 4ms

2

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

6

7

A_RATE_LOW Time

5ms 10ms 20ms 40ms

Select Address Operational explanation

&h3A [ 2:0 ]

Command

R_RATE_LOW Time

0 1ms 1 2ms 2 3

3ms 4ms

Command

4 5 6 7

R_RATE_LOW Time

5ms 10ms 20ms 40ms

Setting 2 of attack recovery detection time

A_TIME_LOW is the setting of the initiation of P2Volume 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 Operational explanation

&h3B [ 6:4 ]

Command

0 50ms 1 100ms 2 3

A_TIME_LOW

150ms 200ms

Command

4 5 6 7

A_TIME_LOW

300ms 400ms 500ms 600ms

www.rohm.com

19/57

2012.03 - Rev.

BU9414FV

A

Technical Note

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

&h3B [ 6:4 ]

Command

0 0.5ms 1 1ms 2 3

R_TIME_LOW

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

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

P

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

&h3D [ 1:0 ]

Command

0 4 1 8 2 3

Value

16 64

Selection of scene change detection time

Default = 0

Select Address Operational explanation

&h3C [ 6:4 ]

Command Time

0 1 2 3

50ms 100ms 150ms 200ms

Command

4 5 6 7

Time

300ms 400ms 500ms 600ms

www.rohm.com

20/57

2012.03 - Rev.

BU9414FV

A

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 Operational explanation

&h3C [ 2:0 ]

Command

0 Over 1.002 1 Over 0.709 2 3

Detection level

Over 0.502 Over 0.355

Command

4 5 6 7

Technical Note

Detection level

Over 0.251 Over 0.178 Over 0.126 Over 0.089

www.rohm.com

21/57

2012.03 - Rev.

BU9414FV

A

Technical Note

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

Loop

+

Lch

+

L-R

-

+

PHASE

SHIFTER

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 Operational explanation

&h70 [ 5 ]

0 Not using of LOOP

1 Using of LOOP

Setting of Surround gain

Default = Fh

Select Address Operational explanation

&h70 [ 3：0 ]

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

22/57

2012.03 - Rev.

BU9414FV

A

Technical Note

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 Operational explanation

&h40 [ 7 ]

0 Peaking filter

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

23/57

2012.03 - Rev.

BU9414FV

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

38

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

Frequency

12.5kHz 14kHz 16kHz 18kHz 20kHz

-

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

24/57

2012.03 - Rev.

BU9414FV

A

Technical Note

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 Operational explanation

&h44 [ 6 ]

0 Using MIDDLE smooth transition function

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 Operational explanation

&h44 [ 0 ]

0 MIDDLE coefficient transmission stop

1 MIDDLE coefficient transmission sart

www.rohm.com

25/57

2012.03 - Rev.

BU9414FV

A

Technical Note

Selection of frequency（F0）

Default = 0Eh

Select Address Operational explanation

&h45 [ 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

Frequency

12.5kHz 14kHz 16kHz 18kHz 20kHz

Selection of quality factor（Q）

Default = 4h

Select Address Operational explanation

&h46 [ 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

Command

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

&h47 [ 6:0 ]

Command Gain

1C -18dB

…

3E -1dB 3F 40 41

…

-0.5dB 0dB

+0.5dB

+1dB42

…

64

+18dB

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

-

www.rohm.com

26/57

2012.03 - Rev.

BU9414FV

A

Technical Note

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 Operational explanation

&h48 [ 7 ]

0 Peaking filter

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

27/57

2012.03 - Rev.

BU9414FV

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

Frequency

12.5kHz 14kHz 16kHz 18kHz 20kHz

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.

-

www.rohm.com

28/57

2012.03 - Rev.

BU9414FV

A

V

l

band

Technical Note

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

oca

P2Bass gain

P2Bassゲイン

ボーカル帯域

f

LPF Cutoff frequency

ON/OFF of P

Default = 0

2

Bass function

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

www.rohm.com

29/57

2012.03 - Rev.

BU9414FV

A

Technical Note

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

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 Operational explanation

&h73[ 1：0 ]

0 1st order

1 2nd order

2 OFF

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

www.rohm.com

30/57

2012.03 - Rev.

BU9414FV

A

Technical Note

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. f

=40Hz）

L

A fundamental-wave component is extracted.（ex. f

HPF

=120Hz）

H

LPF1

Multiple

sound (even

number)

Generator

The generated noise signal is operated orthopedically.（ex. f

Multiple

sound (odd

number)

Generator

LPF2

=240Hz）

C

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 Operational explanation

&h7B [ 6 ]

0 Not using of pseudo bass(2 time sound) function

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 OFF 1 20Hz 2 3

Frequency

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 Operational explanation

&h7C [ 7 ]

0 2nd order

1 4th order

www.rohm.com

31/57

2012.03 - Rev.

BU9414FV

A

Technical Note

Setting of pseudo bass input LPF

Default = 00h

Select Address Operational explanation

&h7C [ 6：4 ]

Command

0 40Hz 1 60Hz 2 3

Frequency

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 Operational explanation

&h7C [ 3：0 ]

Command Frequency

0 80Hz 1 2 3 4 5 6 7

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 Operational explanation

&h7D[ 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

Setting of addition gain for 2 time sound

Default = 00h

Select Address Operational explanation

&h7D[ 3:0 ]

Command Gain

0 -6dB 1 2 3 4 5 6 7

-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 Operational explanation

&h7E[ 2:0 ]

Command

0 -∞ 1 -12dB 2 3

Gain

-10ｄB

-8dB

Command

4 5 6 7

Gain

-6dB

-4dB

-2dB 0dB

www.rohm.com

32/57

2012.03 - Rev.

BU9414FV

A

Technical Note

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 Value Operational explanation

&h75 [ 7 ]

0 Not using of P2Treble function

1 Using of P2Treble function

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

33/57

2012.03 - Rev.

BU9414FV

A

Technical Note

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

&h24 [ 7：0 ]

Command Gain

00 01 +23.5dB

30 31 32

……

FE FF

+24dB

0dB

-0.5dB

-1dB

-103dB

-∞

……

4-13. 7 band・parametric equalizer

77--bbaanndd ppaarraammeettrriicc eeqquuaalliizzeerr

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

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

34/57

2012.03 - Rev.

BU9414FV

A

Technical Note

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

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

Frequency

12.5kHz 14kHz 16kHz 18kHz 20kHz

-

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

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

bit [ 6:0 ]

It sets to every band

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.

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

www.rohm.com

35/57

2012.03 - Rev.

BU9414FV

A

Technical Note

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

&h26 [ 7：0 ]

Command Gain

00 01 +23.5dB

30 31 32

……

FE

FF

+24dB

0dB

-0.5dB

-1dB

……

-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

&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

4-16. 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

&h28 [ 7：0 ]

Command Gain

00 01 +23.5dB

30 31 32

……

FE FF

+24dB

0dB

-0.5dB

-1dB

……

-103dB

-∞

www.rohm.com

36/57

2012.03 - Rev.

BU9414FV

A

Technical Note

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

ON/OFF low frequency DRC .

Default = 0

IN OUT

Select Address Value Operational explanation

&h18 [ 7 ]

BASS and MIDDLE frequency component is extracted.

LPF1

MIDDLE and TREBLE frequency component is extracted.

0 Use low frequency DRC

1 Not use low frequency DRC

min

DET

LPF2

www.rohm.com

37/57

2012.03 - Rev.

BU9414FV

A

Technical Note

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 Operational explanation

&h19 [ 5:4 ]

0 OFF

1 1st order

2 2nd order

Setting of LPF(LPF1) .

Default = 00h

Select Address Operational explanation

&h19 [ 3：0 ]

Command Frequency

0 スルー 1 2 3 4 5 6 7

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 Operational explanation

&h1A [ 6：4 ]

Command

0 1ms 1 2ms 2 3

Time

3ms 4ms

Command

4 5 6 7

Time

5ms 10ms 20ms 40ms

Setting of low frequency R_RATE.

Default = 0h

Select Address Operational explanation

&h1A [ 3：0 ]

www.rohm.com

38/57

Command R_RATE

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

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

10s

2012.03 - Rev.

BU9414FV

A

Technical Note

Setting of low frequency A_TIME.

Default = 0h

Select Address Operational explanation

&h1B [ 6：4 ]

Command A_TIME

0 0.5ms 1 1ms 2 3

1.5ms 2ms

Command

4 5 6 7

A_TIME

3ms 4ms 5ms 6ms

Setting of low frequency R_TIME.

Default = 0h

Select Address Operational explanation

&h1B [ 2：0 ]

Command R_TIME

0 50ms 1 100ms 2 3

150ms 200ms

Command

4 5 6 7

R_TIME

300ms 400ms 500ms 600ms

www.rohm.com

39/57

2012.03 - Rev.

BU9414FV

A

Technical Note

Setting of high frequency A_RATE.

Default = 0h

Select Address Operational explanation

&h1C [ 6：4 ]

Command

0 1ms 1 2ms 2 3

Time

3ms 4ms

Command

4 5 6 7

Time

5ms 10ms 20ms 40ms

Setting of high frequency R_RATE.

Default = 0h

Select Address Operational explanation

&h1C [ 3：0 ]

Command R_RATE

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

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

10s

Setting of high frequency A_TIME.

Default = 0h

Select Address Operational explanation

&h1D [ 6：4 ]

Setting of high frequency R_TIME.

Default = 0h

Select Address Operational explanation

&h1D [ 2：0 ]

Command A_TIME

0 0.5ms 1 1ms 2 3

Command R_TIME

0 50ms 1 100ms 2 3

1.5ms 2ms

150ms 200ms

Command

4 5 6 7

Command

4 5 6 7

A_TIME

3ms 4ms 5ms 6ms

R_TIME

300ms 400ms 500ms 600ms

www.rohm.com

40/57

2012.03 - Rev.

BU9414FV

A

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.

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

Default = 0

Select Address Value Operational explanation

&h29 [ 7 ]

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

0 Not using clipper function

1 Using clipper function

Clip Level

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.

4-19. Selection of sub input data

Selection of Sub input (Sub woofer processing etc.).

The Sub woofer output interlocked with P

In addition, in BU9414FV, the data can be inputted from SP conversion2.

Default = 0

clip_level[15:0]

~clip_level[15:0]

2

Bass’s gain setting is possible by inputting the data that after P2Bass processing.

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

Technical Note

The

clip

leve

www.rohm.com

41/57

2012.03 - Rev.

BU9414FV

A

Technical Note

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

&h2C [ 7：0 ]

Command Gain

00 01 +23.5dB

30 31 32

……

FE FF

+24dB

0dB

-0.5dB

-1dB

……

-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

&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

4-22. 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

&h2E [ 7：0 ]

Command Gain

00 01 +23.5dB

30 31 32

……

FE FF

+24dB

0dB

-0.5dB

-1dB

……

-103dB

-∞

www.rohm.com

42/57

2012.03 - Rev.

BU9414FV

A

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.

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

Default = 0

Select Address Value Operating explanation

&h30 [ 7 ]

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

0 Clipper function is not used

1 Clipper function is used

Clip Level

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

Technical Note

When

settin

www.rohm.com

43/57

2012.03 - Rev.

BU9414FV

A

Technical Note

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 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.

+ +

H.

+ +

3F

a1b1

40

a2b2

21

a1b1

22

H

a2b2

-1

Z

H

-1

Z

H

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

-1

Z

2A

-1

Z

H

a1b1

-1

Z

H

a2b2

+ +

H.

2B

+ +

2C

Coefficient

：number

2D

H.

b0

+ +

-1

Z

H

a1b1

H

a2b2

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

44/57

2012.03 - Rev.

BU9414FV

A

Technical Note

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 Operating explanation

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

1：Automatic renewal function ON

&h6F [ 0 ] Main MAND1 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

45/57

2012.03 - Rev.

BU9414FV

A

Technical Note

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

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 LSB

S

DATAO

16bit

20bit

24bit

MSB LSB

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

5-1. Format setting of three line serial output

Default = 0

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

5-2. Setting data bit width of three line serial output

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

46/57

2012.03 - Rev.

BU9414FV

A

Technical Note

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

Select Address Value Operating Description

&h10 [ 7：6 ]

0 0ms

1 100ms

2 200ms

3 300ms

7. 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

47/57

2012.03 - Rev.

BU9414FV

A

Technical Note

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 ：Rel

ease the mute of the Sub output volume（30h=0dB）.

）.

www.rohm.com

48/57

2012.03 - Rev.

BU9414FV

A

Technical Note

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

00 01 02 03 04 05 06 07

Frequency

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

Command

0C

08 09 0A 0B

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

Frequency

12.5kHz 14kHz 16kHz 18kHz 20kHz

-

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

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

49/57

2012.03 - Rev.

BU9414FV

A

Technical Note

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.

MCLK

I2C

CONTROL LOGIC

&hF3[5:0]

DIV

PLLA PLL_DIV

DSP

S E L 1

AUDIO IF

ERROR_DET

BU9414FV Clock line

&h08[5:4]

S E L 2

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

50/57

2012.03 - Rev.

BU9414FV

A

Technical Note

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.

↓

．EVR is set as -infinit

5

y.

↓

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

51/57

2012.03 - Rev.

BU9414FV

A

Technical Note

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

52/57

2012.03 - Rev.

BU9414FV

A

Technical Note

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

which DSP can operate.

In this case, an allophone may carry out irrespective of the

existence of data.

PLL output frequency

The frequency limit that DSP can operate

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.

Ter

Time

www.rohm.com

53/57

2012.03 - Rev.

BU9414FV

A

Technical Note

13. Audio Interface Signal Specification

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

MCLK

1/ｆMCLK

LRCK

1/fLRCK

BCK

LRCK

BCK

SDATA1,SDATA2

tBLRDG

tBCK

tBCK H tBCKL

Fig 1-2 Clock timing

tLBRD G

tSU;SD

Fig 1-3 Audio interface timing

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

54/57

2012.03 - Rev.

BU9414FV

A

Technical Note

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 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

55/57

2012.03 - Rev.

BU9414FV

A

Technical Note

●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

56/57

2012.03 - Rev.

BU9414FV

A

Technical Note

●Ordering Information

B U 9 4 1 4 F

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)

●Marking Diagram(s)(TOP VIEW)

V

Packaging and forming specification E2: Embossed tape and reel

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

E2

1pin

Order quantity needs to be multiple of the minimum quantity.

∗

Direction of feed

BU9414F

Lot No.

www.rohm.com

57/57

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 BU9414FV Technical data

Specifications and Main Features

Frequently Asked Questions

User Manual