Rohm LAPIS Semiconductor ML22660 User manual

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
1
2
3
4
5
6
7
8
17
18
19
20
21
22
23
24
16
15
14
13
12
11
10
25
26
27
28
29
30
31
(N.C.)
SPP
SPM
RESETB
TEST0
STATUS1
STATUS2
CBUSYB
SPGND
SP
VDD
AIN
SG
V
DDL
D
VDD
DGND
XT
(TOP VIEW)
TQFP32
9
XTB
(N.C.)
IO
VDD
EROFF
ERSO
ERSI
ERSCK
ERCSB
32
DGND
(N.C.)
SAD0
SCL
SDA
SAD1 SAD2
(N.C.)
(N.C.) Unused pin
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FEDL22660-01
ML22660
■Pin Description
Pin Symbol I/O Attribute Description
Initial
value
*1
1,18
DGND
G
-
Digital ground pin.
—
3
SAD0
I
-
I2C slave address select pin.
—
4 SCL I -
I2C slave serial clock pin.
Be sure to insert a pull-up resistor.
H
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
H
6
SAD1
I
-
I2C slave address select pin.
—
7
SAD2
I
-
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.
H
10 ERSCK O -
Serial flash memory interface serial clock output pin.
Setting the EROFF pin to "L" enables output.
L
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.
L
12 ERSO O -
Serial flash memory interface serial data output pin.
Setting the EROFF pin to "L" enables output.
L
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.
L
*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
*1
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.
H
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.
L
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.
L
21 SG O -
Reference voltage output pin for the built-in speaker amplifier.
Connect a capacitor between this pin and SPGND pin.
L
22 AIN I -
Speaker amplifier analog signal input pin.
Initially, input is disabled.
L
23 SPVDD P -
Power supply pin for speaker amplifier.
Connect a bypass capacitor between this pin and the SPGND pin.
—
24
SPGND
G
-
Speaker amplifier ground pin.
—
26 SPP O -
Positive output pin of the speaker amplifier.
Line amplifier outputs are also available with AMODE command.
L
27
SPM
O
-
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
*1
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.
L
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
*3
of channel 0, and output data is "H" level.
H
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
*3
of channel 0, and output data is "H" level.
H
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.
XT
Leave open.
XTB
AIN
Connect to the SPGND.
TEST0
Connect to the DGND.
N.C.
Leave open.
SO
SPM
STATUS1
STATUS2
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FEDL22660-01
ML22660
■I/O Equivalent Circuit
Classifi
cation
Circuit Overview
A
Attribute: Input
Power: DVDD
Function: CMOS inputs with pull-down
Applicable pin: TEST0
B
Attribute: Input
Power: IOVDD
Function: CMOS inputs with pull-down
Applicable pin: EROFF
C
Attribute: Input
Power: DVDD
Function: CMOS inputs with pull-up
Applicable pin: RESETB
D
Attribute: Input
Power: DVDD
Function: CMOS inputs
Applicable pins: SAD0, SAD1, SAD2
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FEDL22660-01
ML22660
Classifi
cation
Circuit Overview
F
Attribute: Input/output
Power: DVDD
Function: CMOS inputs
Function: CMOS outputs
Applicable pins: STATUS1, STATUS2, CBUSYB
G
Attribute: Input/output
Power: IOVDD
Function: CMOS inputs
Function: CMOS outputs
Applicable pin: ERCSB, ERSCK, ERSO
H
Attribute: Input/output
Power: IOVDD
Function: CMOS inputs with pull-down
Function: CMOS outputs
Applicable pin: ERSI
I
XT
XTB
Attribute: Oscillator circuit
Power: DVDD
Function: 4.096M, 4.000MHz oscillation
Applicable pins: XT, XTB
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FEDL22660-01
ML22660
Classifi
cation
Circuit Overview
J
Attribute: Analog
Power: SPVDD
Function: Sound output
Applicable pins: SPP, SPM
L
Attribute: Analog
Power: SPVDD
Function: Sound input
Applicable pins: AIN
M
Attribute: Input
Power: DVDD
Function: Nch Open Drain
Applicable pins: SCL, SDA
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FEDL22660-01
ML22660
■Electrical characteristics
●Absolute maximum rating DGND=SPGND=0V, Ta=25°C
Parameter
Symbol
Condition
Rating
Unit
Power supply voltage 1
DV
DD
IOVDD
SPVDD
— -0.3 to +6.0 V
Input voltage 1
VIN1
—
-0.3 to DVDD+0.3
V
Input voltage 2
VIN2
—
-0.3 to IOVDD+0.3
V
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
mA
Applies to the VDDL pin.
50
mA
Storage temperature
TSTG
—
-55 to +150
°C
●Recommended operating conditions DGND=SPGND=0V
Parameter
Symbol
Condition
Range
Unit
DVDD,
IOVDD,
SPVDD
*1
,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
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