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M65831AP/FP

DIGITAL ECHO (DIGITAL DELAY)

DESCRIPTION The M65831A is an IC developed for producing echo effects added to voice signals picked up by microphone for karaoke applications. The IC has the largest memory among the digital delay series. As it’s design is aimed at high performance, it is best suited to provide radio cassette tape recorders and miniature unit audio system with quality echo function. Being pin compatible with the M65830CP / FP and M65843AP / FP, the M65831AP / FP is suitable for upgrading the series.

Outline FEATURES •Built-in input / output filters, A-D and D-A conver ters, and memory realize a delay system with only a single chip •Capable of composing low-noise and low-distortion delay system at low cost by ADM system (No=-92dB typ, THD=0.5% typ) •Control mode selections available from 2 kinds : easy mode using parallel data and microcomputer mode using serial data •Sleep mode can be selected to stop IC functions •Built-in automatic reset circuit

Outline 24P4 (AP) 2.54mm pitch 600mil DIP (13.0mm X 31.1mm X 3.8mm)

RECOMMENDED OPERATING CONDITIONS Supply voltage range

Outline 24P2W-A(AFP) 1.27mm pitch 450mil SOP (8.4mm X15.0mm X2.0mm)

VCC,VDD=4.5 to 5.5V

Rated supply voltage

VCC,VDD=5.0V

SYSTEM CONFIGURATION RAM HPF

L VOCAL CUT

LPF

BASS

MIX

L

MIX

BASS

MIX

R

KEY CONTROL

HPF

R

MIX

CTL NORM

SEARCH

MIC1

VISS

VISS

M65381AP/FP

MIC VOL MIC AMP

MIC2

MIX

MIX

MIC VOL

ECHO

MIC AMP

MITSUBISHI ELECTRIC

1

ECHO VOL

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MITSUBISHI SOUND PROCESSOR ICS

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M65831AP/FP

DIGITAL ECHO (DIGITAL DELAY)

Pin Configuration

1

24

Vcc

XIN

2

23

LPF1 IN

XOUT

3

22

LPF1 OUT

D1/REQ

4

21

OP1 OUT

D2/SCK

5

20

OP1 IN

D3/DATA

6

19

REF

D4/IDSW

7

18

CC1

TEST

8

17

CC2

EASY/µ -COM

9

16

OP2 IN

SLEEP 10

15

OP2 OUT

D-GND

11

14

LPF2 IN

A-GND

12

13

LPF2 OUT

M65831AP/FP

VDD

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MITSUBISHI SOUND PROCESSOR ICS

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M65831AP/FP

DIGITAL ECHO (DIGITAL DELAY)

BLOCK DIAGRAM LPF1 IN

LPF1 OUT

OP1 OUT

23

22

21

20

CC1

CC2

OP2 IN

18

17

16

MOD

DEM

4.7k

OP2 LPF2 OUT IN

LPF2 OUT

15 14

13

OP2

OP1

LPF1 REF

4.7k

OP1 IN

LPF2

COMP

19 1/2 Vcc D1 AUTO RESET

RESET CLOCK

OSCILLATOR

2

3

XIN XOUT

DO0

DO1

MAIN CONTROL

48K-bit SRAM

MO MI

DELC

DELAY TIME CONTROL

4

5

6

7

8

9 10

11

12

1

SLEEP D-GND A-GND VDD D1/REQ D3/DATA TEST D2/SCK D4/IDSW EASY/µ -COM

24 Vcc

Unit Resistance:Ω

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MITSUBISHI SOUND PROCESSOR ICS

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M65831AP/FP

DIGITAL ECHO (DIGITAL DELAY)

PIN DESCRIPTION No.

Symbol

Name

Function

I/O

1

VDD

Digital VDD

2

XIN

Oscillator input

I

3

XOUT

Oscillator output

O

4

D1/REQ

Delay1/Request

I

Easy mode:inputs D1 data µ -COM mode:inputs request data

5

D2/SCK

Delay2/Shift clock

I

Easy mode:inputs D2 data µ -COM mode:inputs shift clock

6

D3/DATA

Delay3/Serial data

I

Easy mode:inputs D3 data µ -COM mode:inputs serial data

7

D4/IDSW

Delay4/ID switch

I

Easy mode:inputs D4 data µ -COM mode:controls ID code

8

TEST

Test

I

L=normal mode

9

EASY/ µ -COM Easy/ µ -COM

I

H=easy mode L=µ -COM mode

10

SLEEP

Sleep

I

H=sleep mode L=normal mode

11

D GND A GND

Digital GND Analog GND Low pass filter2 output Low pass filter2 input OP-AMP2 output OP-AMP2 input Current control 2 Current control 1 Reference OP-AMP1 input OP-AMP1 output Low pass filter1 output Low pass filter1 input Analog VCC

12 13 14 15 16 17 18 19 20 21 22 23 24

LPF2 OUT LPF2 IN OP2 OUT OP2 IN CC2 CC1 REF OP1 IN OP1 OUT LPF1 OUT LPF1 IN VCC

Supply voltage

Connects to analog GND at one point Connects to analog GND

O I O I

Forms low pass filter with external C.R Forms integrator with external C.R

=1/2VCC

I O O I

MITSUBISHI ELECTRIC

4

Connects to 2MHz ceramic filter

Forms integrator with external C.R

Forms low pass filter with external C.R Supply voltage

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M65831AP/FP

DIGITAL ECHO (DIGITAL DELAY)

ABSOLUTE MAXIMUM RATINGS (Vcc=5V,f=1kHz,Vi=100mVrms,Ta=25°C,unless otherwise noted) Symbol Parameter Conditions Ratings Units Vcc Supply voltage 6.5 V Circuit cuurent

100

mA

Pd

M65831AP Power dissipation M65831AFP

1 650

W mW

Topr

Operating temperature

-20~+75

°C

Tstg

Storage temperature

-40~+125

°C

POWER DISSIPATION Pd (mW)

Icc

THERMAL DERATING (MAXIMUM RATING) 1000

AP

800 AFP

650

600 400 325

200 0

0

25

50

75

100

125

AMBIENT TEMPERATURE Ta (°C )

RECOMMENDED OPERATING CONDITIONS Min

Limits Typ

Max

Supply voltage

4.5

5

5.5

V

VDD

Supply voltage

4.5

5

5.5

Vcc-VDD

Difference voltage

-0.3

0

0.3

V V

fck

Clock frequency

1

2

3

MHz

VIH

High input voltage

0.7VDD

VDD

V

VIL

Low input voltage

0

0.3VDD

V

Symbol

Parameter

Vcc

Conditions

MITSUBISHI ELECTRIC

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Units

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M65831AP/FP

DIGITAL ECHO (DIGITAL DELAY)

ELECTRICAL CHARACTERISTICS (Vcc=5V,f=1kHz,Vi=100mVrms,Ta=25°C,unless otherwise noted) Limits Symbol Parameter Test conditions Min

Typ

Max

Units

18.0

40.0

mA

2.5

dB

Icc

Circuit current

No signal

Gv

Voltage gain

RL=47kΩ

-3.5

-0.5

Maximum output voltage

THD=10%

0.7

1

Vomax THD No SVRR

fs=500kHz

0.3

1.0

fs=250kHz

0.5

1.5

Output noise voltage DIN-AUDIO

(fs=250kHz)

-92

-75

dBV

Supply voltage rejection ∆Vcc=-20dBV,f=100Hz ratio

-40

-25

dB

548

Output distortion

TMUTE Mute time Iccs

Vrms

Circuit current (Sleep mode)

%

30kHz LPF

Upon changing Delay Time

508

528

Upon canceling Sleep Mode

508

528

548

14.0

30.0

Sleep Mode

MITSUBISHI ELECTRIC

6

ms mA

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MITSUBISHI SOUND PROCESSOR ICS

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M65831AP/FP

DIGITAL ECHO (DIGITAL DELAY)

OPERATION 1) DELAY TIME

D4

D3

D2

D1

fs

L

12.3

H

24.6

L

36.9

H

49.2

L L H

L L H H

L L H

L

L H H

500 61.4

H

73.7

L

86.0

H

98.3

L

110.6

H

122.9

L

135.2

H

H

Td

147.5 250

L

159.7

H

172.0

L

184.3

H

196.6

fs=sampling frequency(kHz) Td=delay time(msec)

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MITSUBISHI SOUND PROCESSOR ICS

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M65831AP/FP

DIGITAL ECHO (DIGITAL DELAY)

2) EASY MODE(EASY / µ -COM=H) D1,D2,D3,D4 and sleep are for easy mode D1 D2 D3 D4 SLEEP

delay time

cf 11-1) cf 11-5)

3) µ -COM MODE(EASY / µ -COM=L) REQ

SCK

DATA

SLEEP

D1

D2

D3

D4

MUTE

ID1 ID2 ID3 ID4 ID CODES

DELAY TIME cf 11-1) H=SLEEP MODE cf 11-5)

H=MUTE cf 11-4)

TIMING DIAGRAM This Timing chart shows that delay time is set by serial data from µ -COM. DATA signal is latched at the falling edge of SCK signal,the last ten data are set at the rising edge of REQ signal when ID codes are satisfied. ID1,ID3:L ID2 :H ID4 :equal to IDSW

*

*

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MITSUBISHI SOUND PROCESSOR ICS

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M65831AP/FP

DIGITAL ECHO (DIGITAL DELAY)

REQ,SCK,DATA INPUT TIMING t5

REQ t1

t4

SCK t2 t3 ds

DATA

Symbol

SLEEP

D1

D2

D3

Parameter

t1

SCK pulse width

ds

SCK pulse duty

t2

DATA setup time

t3

D4

MUTE

min

ID1 ID2 ID3 ID4

typ

250

max

Units nsec

50

%

100

t1/2

nsec

DATA hold time

100

t1/2

nsec

t4

REQ hold time

100

nsec

t5

REQ pulse width

250

nsec

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M65831AP/FP

DIGITAL ECHO (DIGITAL DELAY)

4) MUTING (1)Easy mode Automatic mute upon changing delay time,cancelling SLEEP mode and power-on. (2)µ -COM mode MUTE=H:mute MUTE=L:automatic mute AUTOMATIC MUTE DELAY SIGNAL BEFORE CHANGE MODE

DELAY SIGNAL AFTER CHANGE MODE

MUTE TIME

(a) UPON CHANGING DELAY TIME DELAY SIGNAL

MUTE TIME CANCEL SLEEP MODE

(b) UPON CANCELLING SLEEP MODE DELAY SIGNAL

120msec

MUTE TIME

POWER ON

(c) UPON POWER-ON MITSUBISHI ELECTRIC

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MITSUBISHI SOUND PROCESSOR ICS

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M65831AP/FP

DIGITAL ECHO (DIGITAL DELAY)

5) SLEEP MODE SLEEP data is H:clock and RAM stop to reduce circuit current (SLEEP mode) L:normal operation

6) SYSTEM RESET Automatically reset power-on. The reset time is about 120msec. Delay time is set at 147.5msec.

MITSUBISHI ELECTRIC

11

S24

2

1

A

S30

2

50

VCC

24

0.1µ

MITSUBISHI ELECTRIC

12

100p

0.1µ

1

VDD

CLK

2

2MHz

1M

3

100p

2

DELC

1

2

S5

5 1

DELAY TIME CONTROL

S4

4

20 19

47µ

DO0

MOD

18

0.1µ

2

1

S6

6

2

1

S7

7

MAIN CONTROL

OP1

4.7k

21

D1

COMP

RESET

LPF1

22

30

0.1µ

8

DO1

DEM

17

0.1µ

9

16

30

MI

2

1

13

GND VDD

11

1µ

12

ANG.GND

48K-bit SRAM

LPF2

14

560p

10k

5600p 15k

DIG.GND

S10

10

OP2

MO

15 4.7k

0.1µ

15k 2.7k 47k

0.01µ

Vo

L t a f sub P R E; This iisc nlimo its are

OSCILLATOR

AUTO RESET

560p

15k

15k

23

10k

1µ 5600p

1/2 Vcc

100µ

1

tr ice Not parame e som

Units : Resistance Ω Capacitance F

Vcc

Vi

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MITSUBISHI SOUND PROCESSOR ICS

M65831AP/FP

DIGITAL ECHO (DIGITAL DELAY)

TEST CIRCUIT

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MITSUBISHI SOUND PROCESSOR ICS

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M65831AP/FP

DIGITAL ECHO (DIGITAL DELAY)

TEST METHODS Switch condition No

Parameter

Sampling frequency

1 Current circuit 2 Voltage gain

500kHz 250kHz

500kHz

3 Delay time

250kHz

Output voltage

4 (max)

Total harmonic

5 distortion

Output noise

6 voltage

Supply voltage

7 rejection ratio 8 Mute time

500kHz 250kHz

* 1 or 2 S

Symbol 4 Icc 1 Gv1 * Gv2 * Tda 1 Tdb 2 Tdc 1 Tdd 2 Tde 1 Tdf 2 Tdg 1 Tdh 2 Tdi 1 Tdj 2 Tdk 1 Tdl 2 Tdm 1 Tdn 2 Tdo 1 Tdp 2 Vomax 1 * Vomax 2 *

S 5

S S S S S 6 7 10 24 30

1 1 1 * * 1 * * 2 1 1 1 1 1 1 2 1 1 2 1 1 1 2 1 1 2 1 2 2 1 2 2 1 1 1 2 1 1 2 2 1 2 2 1 2 1 2 2 1 2 2 2 2 2 2 2 2 * * 1 * * 2 * * * 1 * * * 2

1 1 1 1

2 1 1 1

notes

2 No signal 1 1 1

cf. 11-1)

1 1 1 1 1

1 1 1 1

1 1 30kHz L.P.F. 1 THD=10% 1 30kHz L.P.F. 1 1

250kHz

THD 1 THD 2

250kHz

No

*

*

* 2 1 1 1 Vi=0mVrms

SVRR

*

*

*

* 1 1 2 f=100Hz

MUTE T 2 1 * MUTE S * *

* *

* 1 1 1 2 * 1 1 1

500kHz

MITSUBISHI ELECTRIC

13

DIN AUDIO

∆Vcc=-20dBv,

Upon changing Delay Time Upon cancelling Sleep Mode

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MITSUBISHI SOUND PROCESSOR ICS

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M65831AP/FP

DIGITAL ECHO (DIGITAL DELAY)

APPLICATION EXAMPLE 30k

1µ 15k 5600p

0.1µ

30

18

17

16

D4

TEST

EASY/µ-COM OP2 IN

SLEEP

DGND

AGND

7

8

9

10

11

12

SLEEP SW

REF D3

6

100p

100p

2.µ -COM MODE

SETTING DELAY TIME

1µ

30k

0.1µ

30

AGND

9

10

11

12

100p

REF

µ -COM MITSUBISHI ELECTRIC

14

LPF2 OUT

DGND

8

LPF2 IN

SLEEP

7

SLEEP SW

6

CC2

5

OP1 IN

4

2MHz

OUT

13

EASY/ µ -COM OP2 IN

14

TEST

OP2 OUT

15

IDSW

16

3

0.1µ 100p

17

DATA

CC1

18

2.7k

560p

SCK

19

1µ

REQ

20

1M 100µ

15k

10k

0.1µ

XOUT

LPF1 OUT

21 OP1 OUT

22

LPF1 IN XIN

Vcc VDD

2

47µ

30

560p

1

0.1µ

0.1µ

0.01µ

5600p

15k

15k

23

3k 0.01µ

non-porlar

1µ 15k 5600p

24

OUT

13

5

2MHz

10k

14

4

0.1µ

IN

15

3 1M

100µ

2.7k

560p OP2 OUT

OP1 OUT

LPF1 OUT

19

CC2

20

CC1

21

1µ

D2

2

22

15k

10k

D1

1

0.1µ

XOUT

LPF1 IN XIN

Vcc VDD

23

0.1µ

30

560p

24

47µ

0.01µ

5600p 15k

0.1µ

15k

10k

3k 0.01µ

non-porlar

LPF2 OUT

1µ

OP1 IN

IN

LPF2 IN

1.EASY MODE

Units Resistance Ω Capacitance F