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¡ Semiconductor

MSM7570L-01/02

¡ Semiconductor

MSM7570L-01/02

Multi-Function ADPCM CODEC

GENERAL DESCRIPTION

The MSM7570L-01/02, developed for advanced digital cordless telephone systems, are single
channel ADPCM CODEC ICs which perform mutual transcoding between the analog voice band
signal and 32 kbps ADPCM serial data.
The devices include DTMF Tone and several types of tone generation, transmit/receive data
mute and gain control, side-tone path and gain control, and VOX function.
Using advanced circuit technology, these devices operate from a single 3 V power supply and
provide low power consumption.

Note: The MSM7570L01differs from MSM7570L02 in Ringing Tone Frequency.

FEATURES

· Single 3 V Power Supply Operation

: 2.7 V to 3.6 V

· ADPCM Algorithm :

ITU-T G.726 (32 kbps, 24 kbps, 16 kbps)

· Full-Duplex Transmit/Receive Operation
·

· Transmit/Receive Synchronous Mode Only
·

· PCM Data Format :

A-law/

-law Selectable

· Serial PCM/ADPCM Transmission Data Rate :64 kbps to 2048 kbps
·

· Low Power Consumption

Operating Mode :

21 mW Typ. (V

= 3.0 V)

Power-Down Mode :

0.3 mW Typ. (V

= 3.0 V)

· Two Analog Input Amplifier Stages :

Externally Adjustable Gain

· Analog Output Stage :

Push-pull Drive (direct drive of 350 W + 120 nF)

· Master Clock Frequency :

12.288/19.200 MHz Selectable

· Transmit/Receive Mute, Transmit/Receive Programmable Gain Control
·

· Side Tone Path with Programmable Attenuation

(8-step Level Adjustment)

· Built-in DTMF Tone Generator
·

· Built-in Various Ringing/Function Tones Generator
·

· Built-in Various Ring Back Tone Generator
·

· Serial MCU Interface Control
·

· Built-in Sounder Driving Amplifier
·

· Built-in VOX Control

Transmit side :

Voice Signal Detect

Receive side :

Background Noise Generation

· Characteristic Evaluation Board.
·

· Package:

32-pin plastic TSOP

(TSOPI32-P-814-0.50-1K)

(Product name: MSM7570L-01TS-K)
(Product name: MSM7570L-02TS-K)

E2U0028-28-82

This version: Aug. 1998

Previous version: Nov. 1996

2/26

¡ Semiconductor

MSM7570L-01/02

BLOCK DIAGRAM

VOXO

XSYNC

PCMSI

PCMSO

BCLK

PCMRI

PCMRO

IR
RSYNC

VOXI

ADPCM

CODER

TXMUTE

RXON/OFF

RXPAD

Ex-

pan-

der

Receive gain adjust

LPF

D/A

Conv.

Filter

Clock/Timing

MCU Interface

REF

Voice

Detect

Compan-

der

Transmit gain adjust

Tone gain adjust

BPF

TXON/OFF

A/D

Conv.

Filter

DTMF/other

Tone Generator

Noise Generator

Side tone gain adjust

AIN1

AIN1+

GSX1

AIN2

GSX2

AOUT+

AOUT

PWI

VFRO

SAO+

SAO

VDDC

DGC

AGC

DEN

EXCK

DIN

DOUT

MCK

PDN/

RESET

RXMUTE

ADPCM

DECODER

Power Detect

4/26

¡ Semiconductor

MSM7570L-01/02

PIN AND FUNCTIONAL DESCRIPTIONS

AIN1+, AIN1, AIN2, GSX1, GSX2

Transmits analog input and the output for transmit gain adjustment.
AIN1 (AIN2) connects to the inverting input of the internal transmit amplifier. AIN1+ connects
to the non-inverting input of the internal transmit amplifier. GSX1 (GSX2) connects to the
internal transmit amplifier output. Refer to Fig.1 for gain adjustment.

VFRO, AOUT+, AOUT, PWI

Receives analog output and the output for receive gain adjustment.
VFRO is the receive filter output. AOUT+ and AOUT are differential analog signal outputs
which can directly drive Z

= 350 W + 120 nF or a 1.2 kW load. Refer to Fig.1 for gain adjustment.

Figure 1 Analog Input/Output Interface

Transmit Gain: V

GSX2

/Vi

= (R2/R1) ¥ (R4/R3)

AIN1

GSX1

to ENCODER

from
DECODER

Differential
Analog
Output

Receive Gain: Vo/V

FRO

= 2 ¥ (R6/R5)

= 120 nF

+ 350 W

AIN2

GSX2

AOUT

PWI

VFRO

AOUT+

AIN1+

REF

Differential
Sound Output

= 120 nF

+ 350 W

SAO

SAO+

SELECT

10 mF

0.1 mF

Differential

Analog Input

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¡ Semiconductor

MSM7570L-01/02

SAO+, SAO

Differential analog outputs for sound output.
Control register data CR4-B5 determines the output pins (AOUT+ and AOUT- /SAO+ and SAO-
) for the voice signal and an acoustic component of the sound tone, DTMF tone, R tone, F tone,
and various types of tones at either the VFRO pin or the SAO+ and SAO- pins. The output load
conditions of these pins are the same as those of AOUT+ and AOUT-.

Analog signal ground.
The output voltage of this pin is approximately 1.4 V. Put the bypass capacitors (10

F in parallel

with 0.1

F ceramic type) between this pin and AG to get the specified noise characteristics.

During power-down, this output voltage is 0 V. The SG voltage if necessary should be used via
a beffer.

Analog ground.

Digital ground.
This ground is separated from the analog signal ground pin (AG). The DG pin must be kept as
close as possible to AG on the PCB.

+3 V power supply.

PDN/RESET

Power down and reset control input.
A "0" level makes the IC enter a power down state. At the same time, all control register data are
reset to the initial state. Set this pin to "1" during normal operating mode. The power down state
is controlled by a logical OR with CR0-B5 of the control register. When using PDN/RESET for
power down and reset control, set CR0-B5 to digital "0".
The reset width (during "L") should be 200ns or more.

MCK

Master clock input.
The frequency must be 12.288 MHz or 19.2 MHz. The applied clock frequency is selected by the
control register data CR0-B6. The master clock signal may be asynchronous with BCLK, XSYNC,
and RSYNC.

6/26

¡ Semiconductor

MSM7570L-01/02

PCMSO

Transmit PCM data output.
PCM is output from MSB in synchronization with the rising edge of BCLK and XSYNC.

PCMSI

Transmit PCM data input.
This signal is converted to the transmit ADPCM data. PCM is shifted in synchronization with
the falling edge of BCLK. Normally, this pin is connected to PCMSO.

PCMRO

Receive PCM data output.
PCM is the output signal after ADPCM decoder processing. This signal is output serially from
MSB in synchronization with the rising edge of BCLK and RSYNC.

PCMRI

Receive PCM data input.
PCM is shifted on the rising edge of the BCLK and input from MSB. Normally, this pin is
connected to PCMRO.

Transmit ADPCM signal output.
After having encoded PCM with ADPCM, this signal is output from MSB in synchronization
with the rising edge of BCLK and XSYNC. This pin is an open drain output and remains in a high
impedence state during power-down. IS requires a pull-up resistor.

Receive ADPCM signal input.
This input signal is shifted serially on the falling edge of BCLK in synchronization with RSYNC,
and input from MSB.

BCLK

Shift clock input for the PCM data (PCMSO, PCMSI, PCMRO, PCMRI) and the ADPCM data(IS,
IR) .
The frequency is set in the 64 kHz to 2048 kHz range.

7/26

¡ Semiconductor

MSM7570L-01/02

XSYNC

Transmit PCM and ADPCM data 8 kHz synchronous signal input.
Synchronize this signal with BCLK signal. XSYNC is used to indicate the MSB of the transmit
serial PCM and ADPCM data stream.
Be sure to input the XSYNC signal because it is also used as the input of the timing generator.

RSYNC

Receive PCM and ADPCM data synchronous signal input.
Synchronize this signal with BCLK signal. RSYNC is used to indicate the MSB of the receive
serial PCM and ADPCM data stream.

VOXO

Transmit VOX function signal output.
VOX function voice recognizes the presence or absence of the transmit voice signal by detecting
the signal energy. "1" and "0" levels set on this pin correspond to the presence and the absence
of voice, respectively. This result appears at the register data CR7-B7. The signal energy detect
threshold is set by the control register data CR6-B6, B5.

VOXI

Signal input for receive VOX function.
A "1" level at VOXI indicates the presence of a voice signal. The decoder block processes normal
receive signal, and the voice signal appears at the analog output pins . The "0" level indicates
the absence of a voice signal. Background noise generated in this device is transferred to the
analog output pins. The background noise amplitude is set by the control register CR6. Because
this signal is ORed with the register data CR6-B3, set the control register data CR6-B3 to digital
"0".

8/26

¡ Semiconductor

MSM7570L-01/02

Voice Input
GSX2

VOXO

VOXI

Voice Output
VFRO

VXON

Voice
Detect

VXOFF

Silence
Detect (Hang-over time)

Normal Voice Signal

Decoded Time period

Background

Noise

(a) Transmit VOX Function Timing Diagram

(b) Receive VOX Function (CR6-B3: digital "0") Timing Diagram

Voice

Silence

Voice

Note: VOXO, VOXI functions becomes valid when setting CR6-B7 to digital "1".

Figure 2 VOX Function

9/26

¡ Semiconductor

MSM7570L-01/02

Figure 3 MCU Interface Input/Output Timing

Table 1 shows the register map.

DEN , EXCK, DIN, DOUT

Serial control ports for MCU interface.
Reading and writing data are performed by an external MCU through these pins. Eight registers
with eight bits are provided on the devices.
DEN is the "Enable" control signal input, EXCK is the data shift clock input, DIN is the address
and data input, and DOUT is the data output.
Fig.3 shows the input/output timing diagram.

R/W : Read/Write enable R : Read only register.

High Impedance

(a) Write Data Timing Diagram

(b) Read Data Timing Diagram

DEN

EXCK

DIN

DOUT

DEN

EXCK

DIN

DOUT

Table-1

Name

Address

Control and Detect Data

R/W

CR0

R/W

A/m

SEL

MCK

SEL

PDN

ALL

PDN

SAO/AOUT

CR1

R/W

MODE1

MODE0

RESET

MUTE

PAD

CR2

R/W

ON/OFF

GAIN2

GAIN1

GAIN0

ON/OFF

GAIN2

GAIN1

GAIN0

CR3

R/W

Side Tone

GAIN2

Side Tone

GAIN1

Side Tone

GAIN0

TONE

ON/OFF

TONE

GAIN3

TONE

GAIN2

TONE

GAIN1

TONE

GAIN0

CR4

R/W

DTMF/

OTHERS

SEL

TONE
SEND

SAO/

VFRO

TONE4

TONE3

TONE2

TONE1

TONE0

CR5

R/W

CR6

R/W

VOX

ON/OFF

LVL1

LVL0

OFF

TIME

VOX

RX NOISE

LEVEL SEL

RX NOISE

LVL1

RX NOISE

LVL0

CR7

VOX
OUT

TX NOISE

LVL1

TX NOISE

LVL0

10/26

¡ Semiconductor

MSM7570L-01/02

ABSOLUTE MAXIMUM RATINGS

Parameter

Power Supply Voltage

Analog Input Voltage

Digital Input Voltage

Storage Temperature

Symbol

AIN

DIN

STG

Condition

Rating

0.3 to +5

0.3 to V

+ 0.3

0.3 to V

+ 0.3

55 to +150

Unit

°C

RECOMMENDED OPERATING CONDITIONS

Parameter

Symbol

Condition

Min.

Typ.

Max.

Unit

Power Supply Voltage

Voltage must be fixed

2.7

3.6

MCK, XSYNC, RSYNC, PCMRI,

PCMSI, BCLK, IR, PDN/RESET,

DEN, EXCK, DIN

Digital Input High Voltage

0.45

MCK, XSYNC, RSYNC, PCMRI,

PCMSI, BCLK, IR, PDN/RESET,

DEN, EXCK, DIN

Digital Input Low Voltage

0.16

Master Clock Frequency

MCK1

MCK (CR0B6 = "0")

0.01%

12.288

+0.01%

MHz

Bit Clock Frequency

BCK

BCLK

2048

kHz

Synchronous Signal Frequency

SYMC

XSYNC, RSYNC

8.0

kHz

Clock Duty Ratio

MCK, BCLK, EXCK

MCK, XSYNC, RSYNC, PCMRI,

PCMSI, BCLK, IR, PDN/RESET,

DEN, EXCK, DIN

Digital Input Rise Time

MCK, XSYNC, RSYNC, PCMRI,

PCMSI, BCLK, IR, PDN/RESET,

DEN, EXCK, DIN

Digital Input Fall Time

Transmit Sync Signal Setting Time

BCLK to XSYNC

100

XSYNC to BCLK

100

Receive Sync Signal Setting Time

BCLK to RSYNC

100

RSYNC to BCLK

100

Synchronous Signal Width

XSYNC, RSYNC

1 BCLK

100

Bypass Capacitors for SG

10 + 0.1

Digital Output Load

IS (Pull-up Resistor)

500

100

IS, PCMSO, PCMRO, VOXO, DOUT

Operating Temperature

+25

+70

°C

MCK2

MCK (CR0B6 = "1")

0.01%

19.200

+0.01%

MHz

PCM, ADPCM Set-up Time

100

PCM, ADPCM Hold Time

100

SG to AG

11/26

¡ Semiconductor

MSM7570L-01/02

Parameter

Power Supply Current

Input High Voltage

Input Low Voltage

Output Low Voltage

Output Leakage Current

Input Capacitance

Symbol

DD1

DD2

Condition

Operating Mode,

No Signal, (V

= 3.0 V)

Power Down Mode, (V

= 3.0 V)

1 LSTTL, Pull-up: 500 W

Min.

0.45

0.0

Typ.

0.1

0.2

Max.

0.2

0.16

0.4

Unit

2.7 V to 3.6 V, Ta = 25°C to +70°C)

Output Resistance

OSG

Input Leakage Current

0 V

2.0

0.5

SG Warm-up Time

SG´GND 10 + 0.1 mF

(Rise time to 90% of max. level)

700

ELECTRICAL CHARACTERISTICS

DC and Digital Interface Characteristics

Parameter

Input Resistance

Output Load Resistance

Output Load Capacitance

Output Amplitude

Input Offset Voltage

Symbol

INX

LGX

OGX

OFGX

Condition

AIN1+ , AIN1 , AIN2

Min.

Typ.

Max.

100

*1.30

+20

Unit

GSX1, GSX2

GSX1, GSX2, R

= 20 kW

PreOPAMPs

2.7 V to 3.6 V, Ta = 25°C to +70°C)

Transmit Analog Interface Characteristics

7.7 dBm (600 W) = 0 dBm0, + 3.14 dBm0 = 1.30 V

(A-law)

7.7 dBm (600 W) = 0 dBm0, + 3.17 dBm0 = 1.30 V

(m-law)

12/26

¡ Semiconductor

MSM7570L-01/02

Parameter

Input Resistance

Output Load Resistance

Output Capacitance

Symbol

INPW

LVF

LAO

LVF

LAO

Condition

PWI

Min.

1.2

Typ.

Max.

100

Unit

VFRO

Output Voltage Level

Offset Voltage

OVF

OAO

OFVF

OFAO

100

*1.30

+100

+20

VFRO,

AOUT+, AOUT, SAO+, SAO

VFRO

AOUT+, AOUT, SAO+, SAO

AOUT+,
AOUT,
SAO+,
SAO
VFRO

AOUT+, AOUT (GAIN = 0 dB,

Power amp only) SAO+, SAO

Power amp (0.3 to 3.4 kHz,

= 350 W + 120 nF)(See Fig.1)

= 20 kW

= 350 W

+ 120 nF(See Fig.1)

= 1.2 kW

2.7 V to 3.6 V, Ta = 25°C to +70°C)

*1.30

Open Loop Gain

7.7 dBm (600 W) = 0 dBm0, + 3.14 dBm0 = 1.30 V

(A-law)

7.7 dBm (600 W) = 0 dBm0, + 3.17 dBm0 = 1.30 V

(m-law)

Receive Analog Interface Characteristics

13/26

¡ Semiconductor

MSM7570L-01/02

Parameter

Transmit Frequency

Response

Symbol

OSS

Level

0 to 60

Min.

Typ.

Max.

Unit

Freq.

Others

OSS

T2 300 to 3000

0.15

+0.20

OSS

1020

Reference

OSS

3300

0.15

+0.80

OSS

3400

0.80

OSS

3968.75

Receive Frequency

Response

0 to 3000

0.15

+0.20

1020

Reference

3300

0.15

+0.80

3400

0.80

3968.75

Transmit Signal

to Distortion Ratio

SD T1

SD T2

SD T3

SD T4

1020

SD T5

Receive Signal

to Distortion Ratio

SD R1

SD R2

SD R3

SD R4

1020

SD R5

Transmit Gain

Tracking

GT T1

0.2

+0.2

GT T2

Reference

GT T3

1020

0.2

+0.2

GT T4

0.5

+0.5

GT T5

1.2

+1.2

Receive Gain

Tracking

GT R1

0.2

+0.2

GT R2

Reference

GT R3

1020

0.2

+0.2

GT R4

0.5

+0.5

GT R5

1.2

+1.2

Condition

OSS

(*1)

2.7 V to 3.6 V, Ta = 25°C to +70°C)

(dBm0)

(Hz)

AC Chracteristics

*1 Use the P-message weighted filter

14/26

¡ Semiconductor

MSM7570L-01/02

Digital Output

Delay Time

PCM and ADPCM

Interface

SDX

200

SDR

200

XD1

200

XD2

200

1 LSTTL + 100 pF,

Pull-up: 500 W

SRRT

Noise Freq.

: 0 to 50 kHz

Power Supply Noise

Rejection Ratio

Noise Level

: 50 mV

SRRR

XD3

200

Parameter

Symbol

Level

Min.

Typ.

Max.

Unit

2.7 V to 3.6 V, Ta = 25°C to +70°C)

Freq.

Others

Condition

See

Fig.4

RD1

RD2

RD3

100

M10

M11

Serial Port Digital

Input/Output Setting

Time

= 100 pF

See

Fig.5

EXCK

MHz

EXCK

Shift Clock Frequency

(dBm0)

(Hz)

IDLT

(75.7) dBmOp

(dBmp)

IDLR

1020

0.285

0.320

(*3)

0.359

0.285

0.320

(*3)

0.359

(79.7)

Idle Channel Noise

AIN = SG

(*1)

(*2)

Vrms

GSX2

Absolute Signal

Amplitude

VFRO

(*1)

AC Characteristics (Continued)

*1 Use the P-message weighted filter
*2 PCMRI input code

"11010101"(A-law)
"11111111"(m-law)

*3 0.320 Vrms = 0 dBm0 = 7.7 dBm

Note: All ADPCM coder and decoder characteristics comply with ITU-T Recommendation

G.726.

15/26

¡ Semiconductor

MSM7570L-01/02

2.5

VXON

OFF Æ ON

Transmit VOX Detect Time

(Voice Signal ON/OFF Detect Time

)

VXOF

Parameter

Symbol

Min.

Typ.

Max.

Unit

2.7 V to 3.6 V, Ta = 25°C to +70°C)

Condition

150/310 160/320 170/330

ON Æ OFF

To the values (CR6-B6, B5)

VOXO,

See Fig.2

+2.5

Transmit VOX Detect Level

Accuracy

(Threshold Level)

dBm0

FT1

DTMF Tones

Frequency Difference

FT2

Parameter

Symbol

Min.

Typ.

Max.

Unit

2.7 V to 3.6 V, Ta = 25°C to +70°C)

Condition

dBm0

Other Tones

Transmit Tones
(Gain setting 0dB)

dBm0

DTMF

, V

Original (reference)

Tone Signal Level

Relative Level of

DTMF Tones

DTMF (High)

and Other Tones
DTMF (Low)

DTMF (High)

and Other Tones

Receive Tones
(Tone generator
gain setting 6dB)

DTMF (Low)

AC Characteristics (DTMF and Other Tones)

*4 Does not contain the setting value set for the programmable gain

AC Characteristics (Programmable Gain Stages)

All gain stages, to programmed value

Gain Accuracy

Parameter

Symbol

Min.

Typ.

Max.

Unit

2.7 V to 3.6 V, Ta = 25°C to +70°C)

Condition

AC Characteristics (VOX Function)

*5 When single tone is input at 1000Hz

16/26

¡ Semiconductor

MSM7570L-01/02

XD1

XD2

SDX

MSB

LSB

XD1

XD2

MSB

LSB

XD3

SDX

BCLK

XSYNC

PCMSO

BCLK

XSYNC

TIMING DIAGRAM

Transmit Side PCM/ADPCM Data Interface

Figure 4 PCM/ADPCM Data Interface

RD1

RD2

SDR

MSB

LSB

RD3

BCLK

RSYNC

PCMRO

BCLK

RSYNC

MSB

LSB

Receive Side PCM/ADPCM Data Interface

18/26

¡ Semiconductor

MSM7570L-01/02

FUNCTIONAL DESCRIPTION

Control Registers

(1) CR0 (Basic operating mode)

Note: Initial Value: Reset state by PDN/RESET

B7 ...PCM Companding law select;

-law, 1/A-law

B6 ...Master clock frequency select;

0/12.288 MHz, 1/19.200 MHz

B5 ...Power down (entire system);

0/Power on, 1/Power down

When using this data for power down control, set pin PDN/RESET at "1"level.
The control registers are not reset by this signal.

B2 ...Not used
B1 ...Not used
B0 ...Power Down for Sound output amps: (SAO+, SAO), or Receiver output amp (AOUT+,

AOUT, VFRO );
If this data is set to digital "1", either a pair of sound amplifiers or a pair of reciver
amplifiers enters the power down state depending on the set data on CR4-B5.
If this data is set to digital "0", sound amplifiers and receiver amplifiers are in the power-
on state.

B4, B3 ... Not used (These pins are used to test the device. They should be set to "0" during normal

operation.)

PDN

SAO/AOUT

PDN ALL

MCK SEL

A/m SEL

CR0

Initial Value (Note)

19/26

¡ Semiconductor

MSM7570L-01/02

(2) CR1 (ADPCM block operating mode)

B7, B6 ... ADPCM data compression algorithm select;

(0, 0):

32 kbps

(0, 1):

64 kbps (data through)

(1, 0):

24 kbps

(1, 1):

16 kbps

B5 ... ADPCM of transmit reset (specified by G.726);

1/Reset*

B4 ... ADPCM of receive reset (specified by G.726 );

1/Reset*

B3 ... ADPCM transmit data mute,

1/Mute

B2 ... ADPCM receive data mute,

1/Mute

B1 ... Not used
B0 ... Receive side PAD,

1/inserted,12 dB loss
0/no PAD

The reset width should be 125ms or more.
The transmitter and receiver cannot be reset separately.
They must be reset at the same time.

RX PAD

RX MUTE

TX MUTE

RX RESET

TX RESET

MODE0

MODE1

CR1

Initial Value

20/26

¡ Semiconductor

MSM7570L-01/02

This programmable gain table, not only for transmit/receive voice signal and the transmitted
DTMF and other tones. The transmission of these tone signal is enabled by the CR4-B6 data
described later. The original (reference) signal amplitude of these tones is analogically defined
as follows.

DTMF low-group-tones .................................... 16 dBm0
DTMF high-group-tones and others............... 14 dBm0

For example, when selecting +8 dB (B6, B5, B4) = (1,1,1) as a transmit gain, each tone signal
amplitude with an analogical expression on the pin PCMSO becomes as follows .

DTMF low-group tones .................................... 8 dBm0
DTMF high-group tones and other tones ...... 6 dBm0

Gain setting for the side tone (path to receive side from transmit side) and the receive side tone
is performed by register CR3.

(3) CR2 (PCM CODEC operational mode setting and transmit/receive gain adjustment)

B7 ... PCM Coder disable;

0/Enable, 1/Disable (transmit PCM idle pattern)

B6, B5, B4 ... Transmit gain adjustment, refer to Table-2.
B3 ... PCM Decoder disable;

0/Enable, 1/Disable (receive PCM idle pattern)

B2, B1, B0 ... Receive gain setting, refer to Table-2.

Table-2

RX GAIN0

RX GAIN1

RX GAIN2

RX ON/OFF

TX GAIN0

TX GAIN1

TX GAIN2

TX ON/OFF

CR2

Initial Value

Transmit Gain

Receive Gain

6 dB

4 dB

2 dB

0 dB

+2 dB

+4 dB

+6 dB

+8 dB

4 dB

2 dB

0 dB

+2 dB

+4 dB

+6 dB

+8 dB

21/26

¡ Semiconductor

MSM7570L-01/02

(4) CR3 (Side tone and other tone generator gain setting)

The tone generator gain setting table for the receive side, as shown in Table-4, depends upon the
following reference level.

DTMF low-group tones ................................ 2 dBm0
DTMF high-group tones and others ............ 0 dBm0

For example, when selecting 6 dB (B3, B2, B1, B0) = (1, 1, 1, 1) as a tone generator gain, each DTMF
tone signal amplitude on SAO+/SAO or VFRO is as follows.

DTMF low-group tone .................................. 8 dBm0
DTMF high-group tone or other tones ....... 6 dBm0

B7, B6, B5 ... Side tone path gain setting, refer to Table-3.
B4 ... Tone generator enable;

0/Disable, 1/Enable

B3, B2, B1, B0 ... Tone generator gain adjustment for receive side, refer to Table-4

Table-3

Side Tone Path Gain

OFF

21 dB

19 dB

17 dB

15 dB

13 dB

11 dB

9 dB

Table-4

TONE

GAIN0

TONE

GAIN1

TONE

GAIN2

TONE

GAIN3

TONE

ON/OFF

Side. Tone

GAIN0

Side. Tone

GAIN1

Side. Tone

GAIN2

CR3

Initial Value

Tone Generator Gain

36 dB

20 dB

34 dB

18 dB

32 dB

16 dB

30 dB

14 dB

28 dB

12 dB

26 dB

10 dB

24 dB

8 dB

22 dB

6 dB

22/26

¡ Semiconductor

MSM7570L-01/02

(5) CR4 (Tone genereator operating mode and frequency select)

(b) B7 = 0 (Other tones)
<MSM7570L-01>

B7 ... DTMF or other tones select; 0/Others, 1/DTMF
B6 ... Tone transmit enable (Transmit side); 0/Voice signal (transmit), 1/Tone transmit
B5 ... Tone output pin select (Receive side); 0/VFRO, 1/SAO+ and SAO
B4, B3, B2, B1, B0 ... Tone frequency setting, referred to Table-5-1, 5-2, and 5-3.

(a) B7 = 1 (DTMF tone)

*Unrelated

Table-5-1

Table-5-2

TONE0

TONE1

TONE2

TONE3

TONE4

SAO/

VFRO

TONE
SEND

DTMF/OTHERS

SEL

CR4

Initial Value

Frequency

697 Hz + 1209 Hz

852 Hz + 1209 Hz

697 Hz + 1336 Hz

852 Hz + 1336 Hz

697 Hz + 1477 Hz

852 Hz + 1477 Hz

697 Hz + 1633 Hz

852 Hz + 1633 Hz

770 Hz + 1209 Hz

941 Hz + 1209 Hz

770 Hz + 1336 Hz

941 Hz + 1336 Hz

770 Hz + 1477 Hz

941 Hz + 1477 Hz

770 Hz + 1633 Hz

941 Hz + 1633 Hz

Frequency

1k/1333 Hz, 16 Hz wamb.

2000 Hz Single tone

800/667 Hz, 16 Hz wamb.

2042 Hz Single tone

800/1k Hz,16 Hz wamb.

2514 Hz Single tone

500/667 Hz,16 Hz wamb.

500 Hz Single tone

500/400 Hz,16 Hz wamb.

667 Hz Single tone

800/1k Hz, 8 Hz wamb.

1333 Hz Single tone

500/400 Hz, 8 Hz wamb.

2100 Hz Single tone

400 Hz,16 Hz wamb.

400 Hz,20 Hz wamb.

400 Hz Single tone

425 Hz Single tone

440 Hz Single tone

450 Hz Single tone

800 Hz Single tone

1000 Hz Single tone

1300 Hz Single tone

23/26

¡ Semiconductor

MSM7570L-01/02

(b) B7 = 0 (Other tones)
<MSM7570L-02>

Table-5-3

(6) CR5 (Not used)

B7 B0..... Not used

Frequency

1k/1333 Hz 16 Hz wamb.

2500 Hz Single tone

800/1k Hz 16 Hz wamb.

2600 Hz Single tone

800/1k Hz 8 Hz wamb.

2670 Hz Single tone

400 Hz, 16 Hz wamb.

2700 Hz Single tone

2700 Hz, 16 Hz wamb.

2800 Hz Single tone

400 Hz

2910 Hz Single tone

800 Hz

3000 Hz Single tone

1000 Hz

3110 Hz Single tone

1333 Hz

3200 Hz Single tone

1440 Hz

1900 Hz

2000 Hz

2100 Hz

2180 Hz

2300 Hz

2400 Hz

CR5

Initial Value

24/26

¡ Semiconductor

MSM7570L-01/02

(7) CR6 (VOX function control)

B7 ... VOX function enable;

0/Disable, 1/Enable

B6, B5 ... Transmit signal energy detect (Transmit VOX) threshold

(0, 0): 30 dBm0
(0, 1): 35 dBm0
(1, 0): 40 dBm0
(1, 1): 45 dBm0

B4 ... Hang-over time (Fig.2, T

VXOFF)

;

0/160 ms, 1/320 ms

B3 ... Receive VOX function setting;

0/Background noise transmit, 1/Voice signal detect

When using this data for control, set pin VOXI at "0" level.

B2 ... Background noise amplitude setting;

0/Automatic, 1/Programmable by B1 and B0

Automatic : Set the noise at the voice signal amplitude when B3 (or VOXI) changes from
"1" to digital "0".

B1, B0 ... (0, 0): No noise

(0, 1): 55 dBm0
(1, 0): 45 dBm0
(1, 1): 35 dBm0

(8) CR7 (Detect register, read only)

For IC test

B7 ... Transmit VOX function result;

0/Silence, 1/Voice

B6, B5 ... Transmit silence level (indicator); (at 1000 Hz)

(0, 0) : Below 60 dBm0

Note: These outputs are valid only when the VOX

(0, 1) : 50 to 60 dBm0

function is enabled by CR6-B7.

(1, 0) : 40 to 50 dBm0
(1, 1) : Above 40 dBm0

B4 ... Not used
B3 ... Not used
B2 ... Not used
B1 ... Not used
B0 ... Not used

RX NOISE

LVL0

RX NOISE

LVL1

RX NOISE

LEVEL SEL

VOX IN

OFF

TIME

LVL0

LVL1

VOX

ON/OFF

CR6

Initial Value

TX NOISE

LVL0

TX NOISE

LVL1

VOX
OUT

CR7

Initial Value

25/26

¡ Semiconductor

MSM7570L-01/02

* Single-ended Analog Input Stage Type

1
2
3

4
5
6
7

32
31
30

29
28
27
26

MSM7570L-01/02 TS

AIN1+
AIN1
GSX1
AIN2
GSX2

VFRO
PWI

AOUT

AOUT+

SAO+

SAO

PDN/RESET

VOXI

BCLK

XSYNC

RSYNC

PCMSO

PCMSI

PCMRO

PCMRI

MCK

DEN

EXCK

DIN

DOUT

VOXO

8 kHz Sync. Signal input

Bit Clock
(64 kHz to 2048 kHz)

ADPCM Output

ADPCM Input

VOX OUT

Interface

Serial MCU

Master Clock

Power-Down/Reset Input

Receive Voice Analog Output

VOX IN

Transmit
Voice
Analog Input

Sound

APPLICATION CIRCUIT

26/26

¡ Semiconductor

MSM7570L-01/02

(Unit : mm)

PACKAGE DIMENSIONS

Notes for Mounting the Surface Mount Type Package

The SOP, QFP, TSOP, SOJ, QFJ (PLCC), SHP and BGA are surface mount type packages, which
are very susceptible to heat in reflow mounting and humidity absorbed in storage.
Therefore, before you perform reflow mounting, contact Oki's responsible sales person for the
product name, package name, pin number, package code and desired mounting conditions
(reflow method, temperature and times).

TSOPI32-P-814-0.50-1K

Package material
Lead frame material
Pin treatment
Solder plate thickness
Package weight (g)

Epoxy resin
42 alloy
Solder plating
5 mm or more
0.27 TYP.

Mirror finish

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ÐÐ»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: MSM7570L-02