Rohm LAPIS Semiconductor ML22660 Manuale utente

FEDL22660-01

Issue date: Apr 24, 2020

ML22660

4-Channel Mixing Speech Synthesis LSI

■Overview

ML22660 is a 4-channel mixing speech synthesis LSI with a serial flash memory interface for sound data. It is equipped

with a I2C interface (slaves).

It adopts a HQ-ADPCM*1, 16-bit D/A converter, and low-pass filter for high sound quality, and incorporates a 1.0W mono

speaker amplifier for driving speakers directly. It is also equipped with a function to detect failure.

The functions necessary for sound output are integrated into a single chip, so that sound functions can be realized simply by

adding this LSI.

● Memory capacity and maximum sound production time (HQ-ADPCM*1 algorithm, registered phrase 1024)

Product Name

Flash memory capacity

Maximum sound production time (sec)

fs=8.0kHz

fs=16.0kHz

fs=32.0kHz

ML22660

128Mbits

(Serial Flash Memory)

5240 2620 1310

Application Circuit

Host

MCU 16bit

DAC

Filter

Volume

MIX

I2C

Analog Signal

MIX

Decode

FLASH

MEMORY

Speaker

AMP

*1 HQ-ADPCM is "Ky's" high-quality audio compression technique.

"Ky's" is a registered trademark of Kyushu Institute of Technology, a

national university corporation.

FEDL22660-01

ML22660

■Feature

● Sound data

Speech synthesis algorithm: The algorithm can be specified for each phrase.

HQ-ADPCM/4bit ADPCM2/8bit non-linear PCM /

8bit Straight PCM/16bit Straight PCM

Sampling frequency: The sampling frequency can be specified for each phrase.

10.7/21.3kHz,

6.4/12.8/25.6kHz,

8.0/16.0/32.0kHz,

11.025/22.05/44.1kHz,

12.0/24.0/48.0kHz

Maximum number of phrases: 4096 Phrases

● Edit ROM function

● Playback function

Repeat function: LOOP command

Mixing-function: Up to 4-channel

Volume adjustment function: CVOL command 128 levels (including off-state)

AVOL command 16 levels (including off-state)

● Low-pass filter

● 16-bit D/A converter

● Speaker amplifier: Class AB/D 1. 0W 8Ω (SPVDD =5V, Ta=25 OC)

● Line amplifier output: 10kΩ driving (Exclusive operation from speaker amplifier output)

● External analog sound input (at the time Class AB speaker amplifier choice, with analog mixing function)

● MCU command interface: I2C Interface (Slaves)

● Failure detection function

Speaker short detection: Speaker pin ground fault detection, speaker pin short detection

Speaker disconnection detection

Thermal detection

Clock error detection

Flash memory error detection

● Clock backup function

● Master clock frequency: 4.096MHz, 4.000MHz

● Power-supply voltage 2.7V to 5.5V

●Operating temperature range: -40 OCto +85 OC*1

● Package: 32-pin TQFP (7mm x 7mm, 0.8mm pitch)

● Ordered Part Name: ML22660TB (32-pin TQFP)

*1 The operating time of the speaker amplifier may be limited depending on the average ambient temperature (Ta) used.

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FEDL22660-01

ML22660

■Pin Configuration (TOP VIEW)

●ML22660TB

(N.C.)

SPP

SPM

RESETB

TEST0

STATUS1

STATUS2

CBUSYB

SPGND

VDD

AIN

DDL

VDD

DGND

(TOP VIEW)

TQFP32

XTB

(N.C.)

VDD

EROFF

ERSO

ERSI

ERSCK

ERCSB

DGND

(N.C.)

SAD0

SCL

SDA

SAD1

SAD2

(N.C.)

(N.C.) Unused pin

3/116

FEDL22660-01

ML22660

■Pin Description

Pin Symbol I/O Attribute Description

Initial

value

1,18

DGND

Digital ground pin.

—

SAD0

I2C slave address select pin.

—

4 SCL I -

I2C slave serial clock pin.

Be sure to insert a pull-up resistor.

5 SDA IO -

I2C slave serial data input/output pin.

Be sure to insert a pull-up resistor.

Output: Nch MOS OPEN DRAIN output

Input: High-impedance input

SAD1

I2C slave address select pin.

—

SAD2

I2C slave address select pin.

—

9 ERCSB O Negative

Serial flash memory interface chip select output pin.

Output the "H" level during non-access and the "L" level during

access.

Setting the EROFF pin to "L" enables output.

10 ERSCK O -

Serial flash memory interface serial clock output pin.

Setting the EROFF pin to "L" enables output.

11 ERSI I -

Serial flash memory interface serial data input pin.

Setting the EROFF pin to "L" enables input.

A pull-down resistor is internally connected.

12 ERSO O -

Serial flash memory interface serial data output pin.

Setting the EROFF pin to "L" enables output.

13 EROFF I Positive

Pin to disable the serial flash memory interface.

When this bit is set to "L", the serial

flash memory interface pin is

enabled. A pull-down resistor is internally connected.

Set this pin to "L" during playback operation using serial flash

memory.

When this pin set to "H", the serial flash memory interface is in a

condition of high-impedance.

Set this bit to "H" for onboard rewriting.

*1 Initial value at reset input and power-down. The pin whose IO is "I" indicates a fixed level from outside.

4/116

FEDL22660-01

ML22660

Pin Symbol I/O Attribute Description

Initial

value

14 IOVDD P -

Serial flash memory interface power supply pin.

Connect a bypass capacitor between this pin and the DGND pin.

—

16 XTB O Negative

Crystal or ceramic resonator connection pin.

When an external clock is used, leave it open and capacitor is not

required when a crystal or ceramic resonator is connected.

When using a resonator, connect it as close as possible.

Leave it open when not in use.

17 XT I Positive

Crystal or ceramic resonator connection pin.

A feedback resistor of about 1MΩ is built in between the XT pin and

the XTB pin.

To use an external clock, input from this pin. Delete the capacitor

when a crystal or ceramic resonator is connected.

When using a resonator, connect it as close as possible.

Leave it open when not in use.

19 DVDD P -

Digital power supply pin.

Connect a bypass capacitor between this pin and the DGND pin.

—

20 VDDLO -

2.5V regulator output pin.

Used as internal power supply.

Connect a capacitor between this pin and DGND pin as close as

possible.

21 SG O -

Reference voltage output pin for the built-in speaker amplifier.

Connect a capacitor between this pin and SPGND pin.

22 AIN I -

Speaker amplifier analog signal input pin.

Initially, input is disabled.

23 SPVDD P -

Power supply pin for speaker amplifier.

Connect a bypass capacitor between this pin and the SPGND pin.

—

SPGND

Speaker amplifier ground pin.

—

26 SPP O -

Positive output pin of the speaker amplifier.

Line amplifier outputs are also available with AMODE command.

SPM

Negative output pin of the speaker amplifier.

Hi-Z

*1 Initial value at reset input and power-down. The pin whose IO is "I" indicates a fixed level from outside.

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FEDL22660-01

ML22660

Pin Symbol I/O Attribute Description

Initial

value

28 RESETB I Negative

Reset input pin.

The LSI is initialized by the "L" level input. After a reset is input, all the

circuits stop operating and enter the power-down state.

At power-on, input an

"L" level to this pin. After the power supply

voltage stabilizes, set this pin to an "H" level.

A pull-up resistor is internally connected.

(*2)

29 TEST0 I Positive

Input pin for testing.

A pull-down resistor is internally connected.

Fix to the DGND.

30 STATUS1 O -

Status/error output pin 1.

Execute OUTSTAT command to select BUSYB*3 and NCR*3 in each

channel, or errors.

The initial value is BUSYB

of channel 0, and output data is "H" level.

31 STATUS2 O -

Status/error output pin 2.

Execute OUTSTAT command to select BUSYB*3 and NCR*3 in each

channel, or errors.

The initial value is BUSYB

of channel 0, and output data is "H" level.

32 CBUSYB O Negative

Command processing status signal output pin.

An "L" level is output during command processing.

Be sure to input a command with this pin at an "H" level.

(*2)

2,8,

15,25

N.C. - -

Unused pin.

Leave open.

Hi-Z

*1 Initial value at reset input and power-down. The pin whose IO is "I" indicates a fixed level from outside.

*2 "L" at reset, "H" at power-down

*3 For NCR, BUSYB, refer to the description of "RDSTAT command".

■Termination of Unused Pins

This section explains how to terminate unused pins.

Symbol

Recommended pin termination

EROFF

Connect to the DGND.

Leave open.

XTB

AIN

Connect to the SPGND.

TEST0

Connect to the DGND.

N.C.

Leave open.

SPM

STATUS1

STATUS2

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FEDL22660-01

ML22660

■I/O Equivalent Circuit

Classifi

cation

Circuit Overview

Attribute: Input

Power: DVDD

Function: CMOS inputs with pull-down

Applicable pin: TEST0

Attribute: Input

Power: IOVDD

Function: CMOS inputs with pull-down

Applicable pin: EROFF

Attribute: Input

Power: DVDD

Function: CMOS inputs with pull-up

Applicable pin: RESETB

Attribute: Input

Power: DVDD

Function: CMOS inputs

Applicable pins: SAD0, SAD1, SAD2

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FEDL22660-01

ML22660

Classifi

cation

Circuit Overview

Attribute: Input/output

Power: DVDD

Function: CMOS inputs

Function: CMOS outputs

Applicable pins: STATUS1, STATUS2, CBUSYB

Attribute: Input/output

Power: IOVDD

Function: CMOS inputs

Function: CMOS outputs

Applicable pin: ERCSB, ERSCK, ERSO

Attribute: Input/output

Power: IOVDD

Function: CMOS inputs with pull-down

Function: CMOS outputs

Applicable pin: ERSI

XTB

Attribute: Oscillator circuit

Power: DVDD

Function: 4.096M, 4.000MHz oscillation

Applicable pins: XT, XTB

8/116

FEDL22660-01

ML22660

Classifi

cation

Circuit Overview

Attribute: Analog

Power: SPVDD

Function: Sound output

Applicable pins: SPP, SPM

Attribute: Analog

Power: SPVDD

Function: Sound input

Applicable pins: AIN

Attribute: Input

Power: DVDD

Function: Nch Open Drain

Applicable pins: SCL, SDA

9/116

FEDL22660-01

ML22660

■Electrical characteristics

●Absolute maximum rating DGND=SPGND=0V, Ta=25°C

Parameter

Symbol

Condition

Rating

Unit

Power supply voltage 1

IOVDD

SPVDD

— -0.3 to +6.0 V

Input voltage 1

VIN1

—

-0.3 to DVDD+0.3

Input voltage 2

VIN2

—

-0.3 to IOVDD+0.3

Allowable loss PD

When the LSI is mounted on

JEDEC 4-layer board.

SPVDD = 5V

1000 mW

Output short-circuit current IOS Applies to pins other than

SPM, SPP and VDDL pins.

10 mA

Applies to SPM and SPP pins.

500

Applies to the VDDL pin.

Storage temperature

TSTG

—

-55 to +150

°C

●Recommended operating conditions DGND=SPGND=0V

Parameter

Symbol

Condition

Range

Unit

DVDD,

IOVDD,

SPVDD

,Power-supply voltage

DVDD

IOVDD

SPVDD

— 2.7 to 3.6 / 3.3 to 5.5 V

Operating temperature

Top

—

-40 to +85

°C

Master clock frequency fOSC —

Min.

Typ.

Max.

MHz

Typ

-5% 4.096 Typ

+5%

4.000

*1 SPVDD≥DVDD

10/116

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